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  • Trying to serialize and unserialze a Binary search tree to a file

    - by ClearMist
    I am trying to find a way to use these methods to save and restore a binary search tree that contains names and phone numbers in each node. I am just very lost and how to go about doing this. 'public void save(String fileName) { // TODO : implement this method. // save bst to its original shape. } public void restore(String fileName) { // TODO : implement this method. // restore bst from a file, if file exists. // do nothing, otherwise. File fichier = new File(fileName); if (fichier.exists()) { } }'

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  • what happens with memory when I throw an exception?

    - by Vincenzo
    This is the code (just a simplification of a real problem): <?php echo memory_get_usage() . "\n"; function f() { throw new Exception(); } function foo() { try { f(); } catch (Exception $e) { } } foo(); echo memory_get_usage() . "\n"; This is the output (PHP 5.3): 630680 630848 What happened with memory (168 bytes lost)? The exception object is not destroyed? Please, help! Thanks

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  • Apache/mod_rewrite > Tomcat encoding %26 and "&"...

    - by user293479
    Apache is the front-end to my web app then I use mod_rewrite to proxy the request to JBoss. So far this sounds pretty standard, but the problem I am having is: if I access the app directly through jboss @ http://localhost:8080/app/page?raw=foo%26bar&page=1: request.getParameter("raw") = foo&bar If I access the app through Apache @ http://localhost/foo%26bar&page=1 request.getParameter("raw") = foo So somewhere along the way, the %26 is lost and replaced with an & which chops the raw variable. This is my Apache rewrite rule. RewriteRule ^/(.*) \ http://localhost:8080/app/home?raw=$1 [L,P] The Apache access log shows: http://localhost/foo%26bar&page=1 And the rewrite log shows: http://localhost:8080/app/home?raw=foo&bar&page=1 But I want the request to be: http://localhost:8080/app/home?raw=foo%26bar&page=1 I am pretty sure that this also occurs with slashes / too so to me this is some sort of encoding issue. Is there a way to proxy the URL untouched? Can't seem to figure this one out.

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  • Why are my hard drives failing?

    - by WishCow
    I have a small Ubuntu server running at home, with 2 HDDs. There are two software raids (raid1) on the disks, managed by mdadm, which I believe is irrelevant, but mentioning it anyway. Both of the HDDs are Western Digital, and have been used for around 2 years, when one of them started making clicking noises, and died. I figured that maybe it's natural after 2 years, so I bought a new one, and resynced the raid arrays. After about a month, the other drive also died. I didn't get suspicious, since both drives have been bought at the same time, it's not that surprising to see both of them near each other, so I bought another one. So far, 2 old drives failed, and 2 brand new in the system. After one month, one of the new drives died. This is when it started getting suspicious. Since the PC was put together from some really old parts (think AthlonXP), I figured that maybe the motherboard's SATA controller is the culprit. Of course you can't switch parts easily in an old PC like this, so I bought a whole system, new MB, new CPU, new RAM. Took the just failed drive back, since it was under warranty, and got it replaced. So it is up to 2 failed drives from the old ones, and 1 failed drive from the new ones. No problems, for 1 month. After that errors were creeping up again in /var/log/messages, and mdadm was reporting raid array failures. I started tearing my hair out. Everything is new in the system, it's up to the third brand new HDD, it's simply not possible that all of the new drives that I bought were faulty. Let's see what is still common... the cables. Okay, long shot, let's replace the SATA cables. Take HDD back, smile to the guy at the counter and say that I'm really unlucky. He replaces the HDD. I come home, one month passes and one of HDDs fails, again. I'm not joking. Two of the brand new HDDs have failed. Maybe it's a bug in the OS. Let's see what the manufacturer's testing tool says. Download testing tool, burn it to a CD, reboot, leave HDD testing overnight. Test says that the drive is faulty, and I should back up everything, if I still can. I don't know what's happening, but it does not look like a software problem, something is definitely thrashing the HDDs. I should mention now, that the whole system is in a shoebox. Since there are a load of "build your own ikea case" stuff, I thought there shouldn't be any problems throwing the thing in a box, and stuffing it away somewhere. The box is well ventilated, but I thought that just maybe the drives were overheating. There is no other possible answer to this. So I took the HDD back, and got it replaced (for the 3rd time), and bought HDD coolers. And just now, I have heard the sound of doom. click click whizzzzzzzzz. SSH into the box: You have new mail! mail r 1 DegradedArrayEvent on /dev/md0 ... dmesg output: [47128.000051] ata3: lost interrupt (Status 0x50) [47128.000097] end_request: I/O error, dev sda, sector 58588863 [47128.000134] md: super_written gets error=-5, uptodate=0 [48043.976054] ata3: lost interrupt (Status 0x50) [48043.976086] ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [48043.976132] ata3.00: cmd c8/00:18:bf:40:52/00:00:00:00:00/e1 tag 0 dma 12288 in [48043.976135] res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) [48043.976208] ata3.00: status: { DRDY } [48043.976241] ata3: soft resetting link [48044.148446] ata3.00: configured for UDMA/133 [48044.148457] ata3.00: device reported invalid CHS sector 0 [48044.148477] ata3: EH complete Recap: No possibility of overheating 6 drives have failed, 4 of those have been brand new. I'm not sure now that the original two have been faulty, or suffered the same thing that the new ones. There is nothing common in the system, apart from the OS which is Ubuntu Karmic now (started with Jaunty). New MB, new CPU, new RAM, new SATA cables. No, the little holes on the HDD are not covered I'm crying. Really. I don't have the face to return to the store now, it's not possible for 4 drives to fail under 4 months. A few ideas that I have been thinking: Is it possible that I fuck up something when I partition and resync the drives? Can it be so bad that it physicaly wrecks the drive? (since the vendor supplied tool says that the drive is damaged) I do the partitoning with fdisk, and use the same block size for the raid1 partitions (I check the exact block sizes with fdisk -lu) Is it possible that the linux kernel or mdadm, or something is not compatible with this exact brand of HDDs, and thrashes them? Is it possible that it may be the shoebox? Try placing it somewhere else? It's under a shelf now, so humidity is not a problem either. Is it possible that a normal PC case will solve my problem (I'm going to shoot myself then)? I will get a picture tomorrow. Am I just simply cursed? Any help or speculation is greatly appreciated. Edit: The power strip is guarded against overvoltage. Edit2: I have moved inbetween these 4 months, so the possibility of the cause being "dirty" electricity in both places, is very low. Edit3: I have checked the voltages in the BIOS (couldn't borrow a multimeter), and they are all seem correct, the biggest discrepancy is in the 12V, because it's supplying 11.3. Should I be worried about that? Edit4: I put my desktop PC's PSU into the server. The BIOS reported much more accurate voltage readings, and also it has successfully rebuilt the raid1 array, which took some 3-4 hours, so I feel a little positive now. Will get a new PSU tomorrow to test with that. Also, attaching the picture about the box: (disregard the 3rd drive)

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  • init never reaping zombie/defunct processes

    - by st9
    Hi, On my Fedora Core 9 webserver with kernel 2.6.18.8, init isn't reaping zombie processes. This would be bearable if it wasn't for the process table eventually reaching an upper limit where no new processes can be allocated. Sample output of ps -el | grep 'Z': F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 5 Z 0 2648 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 1 Z 51 2656 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 1 Z 0 2670 1 0 75 0 - 0 exit ? 00:00:02 crond <defunct> 4 Z 0 2874 1 0 82 0 - 0 exit ? 00:00:00 mysqld_safe <defunct> 5 Z 0 28104 1 0 76 0 - 0 exit ? 00:00:00 httpd <defunct> 5 Z 0 28716 1 0 76 0 - 0 exit ? 00:00:06 lfd <defunct> 5 Z 74 10172 1 0 75 0 - 0 exit ? 00:00:00 sshd <defunct> 5 Z 0 11199 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 5 Z 0 11202 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 5 Z 0 11205 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 5 Z 0 11208 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 5 Z 0 11211 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 5 Z 0 11240 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 5 Z 0 11246 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 5 Z 0 11249 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 5 Z 0 11252 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 1 Z 0 14106 1 0 80 0 - 0 exit ? 00:00:00 anacron <defunct> 5 Z 0 14631 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> Is this an OS bug? misconfiguration? I'm looking for inspiration as to the source of this problem. Thanks

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  • Ask the Readers: Do You Use the Command Line?

    - by Asian Angel
    Most people have heard of it but not everyone is familiar or comfortable with how to use this bastion of geekdom. This week we would like to know if you use the command line or not. The command line…the bastion of ultimate geekery in many peoples’ eyes. You often hear people referring to doing things using the command line, so there must be something to it, right? For some people using the command line is the best, most efficient, and easiest way to do things on their systems. These are the people that many of us wish we were like. Next you have those who are proficient at using the command line but do not rely on it for everything they do on their systems. Then there are people who know how to perform some tasks or hacks using the command line but may not be as comfortable or knowledgeable as they wish to be using it. Moving on you find those who are interested in learning how to use the command line and just need a small push to get started.  Perhaps you feel too intimidated to learn it and just need the right opportunity to come along. And maybe you do not care one way or the other so long as you get done what you want to do on your system. Or you may prefer to simply use a graphical interface since that is quicker and easier for you (along with being familiar). You can find the whole range of people when it comes to using the command line… This week we would like to know if you use the command line or not. What command line category do you fit into? Power user? Casual usage? Totally lost? Let us know in the comments! How-To Geek Polls require Javascript. Please Click Here to View the Poll. Latest Features How-To Geek ETC The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek The How-To Geek Guide to Learning Photoshop, Part 7: Design and Typography Fun and Colorful Firefox Theme for Windows 7 Happy Snow Bears Theme for Chrome and Iron [Holiday] Download Full Command and Conquer: Tiberian Sun Game for Free Scorched Cometary Planet Wallpaper Quick Fix: Add the RSS Button Back to the Firefox Awesome Bar Dropbox Desktop Client 1.0.0 RC for Windows, Linux, and Mac Released

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  • Guidance: A Branching strategy for Scrum Teams

    - by Martin Hinshelwood
    Having a good branching strategy will save your bacon, or at least your code. Be careful when deviating from your branching strategy because if you do, you may be worse off than when you started! This is one possible branching strategy for Scrum teams and I will not be going in depth with Scrum but you can find out more about Scrum by reading the Scrum Guide and you can even assess your Scrum knowledge by having a go at the Scrum Open Assessment. You can also read SSW’s Rules to Better Scrum using TFS which have been developed during our own Scrum implementations. Acknowledgements Bill Heys – Bill offered some good feedback on this post and helped soften the language. Note: Bill is a VS ALM Ranger and co-wrote the Branching Guidance for TFS 2010 Willy-Peter Schaub – Willy-Peter is an ex Visual Studio ALM MVP turned blue badge and has been involved in most of the guidance including the Branching Guidance for TFS 2010 Chris Birmele – Chris wrote some of the early TFS Branching and Merging Guidance. Dr Paul Neumeyer, Ph.D Parallel Processes, ScrumMaster and SSW Solution Architect – Paul wanted to have feature branches coming from the release branch as well. We agreed that this is really a spin-off that needs own project, backlog, budget and Team. Scenario: A product is developed RTM 1.0 is released and gets great sales.  Extra features are demanded but the new version will have double to price to pay to recover costs, work is approved by the guys with budget and a few sprints later RTM 2.0 is released.  Sales a very low due to the pricing strategy. There are lots of clients on RTM 1.0 calling out for patches. As I keep getting Reverse Integration and Forward Integration mixed up and Bill keeps slapping my wrists I thought I should have a reminder: You still seemed to use reverse and/or forward integration in the wrong context. I would recommend reviewing your document at the end to ensure that it agrees with the common understanding of these terms merge (forward integration) from parent to child (same direction as the branch), and merge  (reverse integration) from child to parent (the reverse direction of the branch). - one of my many slaps on the wrist from Bill Heys.   As I mentioned previously we are using a single feature branching strategy in our current project. The single biggest mistake developers make is developing against the “Main” or “Trunk” line. This ultimately leads to messy code as things are added and never finished. Your only alternative is to NEVER check in unless your code is 100%, but this does not work in practice, even with a single developer. Your ADD will kick in and your half-finished code will be finished enough to pass the build and the tests. You do use builds don’t you? Sadly, this is a very common scenario and I have had people argue that branching merely adds complexity. Then again I have seen the other side of the universe ... branching  structures from he... We should somehow convince everyone that there is a happy between no-branching and too-much-branching. - Willy-Peter Schaub, VS ALM Ranger, Microsoft   A key benefit of branching for development is to isolate changes from the stable Main branch. Branching adds sanity more than it adds complexity. We do try to stress in our guidance that it is important to justify a branch, by doing a cost benefit analysis. The primary cost is the effort to do merges and resolve conflicts. A key benefit is that you have a stable code base in Main and accept changes into Main only after they pass quality gates, etc. - Bill Heys, VS ALM Ranger & TFS Branching Lead, Microsoft The second biggest mistake developers make is branching anything other than the WHOLE “Main” line. If you branch parts of your code and not others it gets out of sync and can make integration a nightmare. You should have your Source, Assets, Build scripts deployment scripts and dependencies inside the “Main” folder and branch the whole thing. Some departments within MSFT even go as far as to add the environments used to develop the product in there as well; although I would not recommend that unless you have a massive SQL cluster to house your source code. We tried the “add environment” back in South-Africa and while it was “phenomenal”, especially when having to switch between environments, the disk storage and processing requirements killed us. We opted for virtualization to skin this cat of keeping a ready-to-go environment handy. - Willy-Peter Schaub, VS ALM Ranger, Microsoft   I think people often think that you should have separate branches for separate environments (e.g. Dev, Test, Integration Test, QA, etc.). I prefer to think of deploying to environments (such as from Main to QA) rather than branching for QA). - Bill Heys, VS ALM Ranger & TFS Branching Lead, Microsoft   You can read about SSW’s Rules to better Source Control for some additional information on what Source Control to use and how to use it. There are also a number of branching Anti-Patterns that should be avoided at all costs: You know you are on the wrong track if you experience one or more of the following symptoms in your development environment: Merge Paranoia—avoiding merging at all cost, usually because of a fear of the consequences. Merge Mania—spending too much time merging software assets instead of developing them. Big Bang Merge—deferring branch merging to the end of the development effort and attempting to merge all branches simultaneously. Never-Ending Merge—continuous merging activity because there is always more to merge. Wrong-Way Merge—merging a software asset version with an earlier version. Branch Mania—creating many branches for no apparent reason. Cascading Branches—branching but never merging back to the main line. Mysterious Branches—branching for no apparent reason. Temporary Branches—branching for changing reasons, so the branch becomes a permanent temporary workspace. Volatile Branches—branching with unstable software assets shared by other branches or merged into another branch. Note   Branches are volatile most of the time while they exist as independent branches. That is the point of having them. The difference is that you should not share or merge branches while they are in an unstable state. Development Freeze—stopping all development activities while branching, merging, and building new base lines. Berlin Wall—using branches to divide the development team members, instead of dividing the work they are performing. -Branching and Merging Primer by Chris Birmele - Developer Tools Technical Specialist at Microsoft Pty Ltd in Australia   In fact, this can result in a merge exercise no-one wants to be involved in, merging hundreds of thousands of change sets and trying to get a consolidated build. Again, we need to find a happy medium. - Willy-Peter Schaub on Merge Paranoia Merge conflicts are generally the result of making changes to the same file in both the target and source branch. If you create merge conflicts, you will eventually need to resolve them. Often the resolution is manual. Merging more frequently allows you to resolve these conflicts close to when they happen, making the resolution clearer. Waiting weeks or months to resolve them, the Big Bang approach, means you are more likely to resolve conflicts incorrectly. - Bill Heys, VS ALM Ranger & TFS Branching Lead, Microsoft   Figure: Main line, this is where your stable code lives and where any build has known entities, always passes and has a happy test that passes as well? Many development projects consist of, a single “Main” line of source and artifacts. This is good; at least there is source control . There are however a couple of issues that need to be considered. What happens if: you and your team are working on a new set of features and the customer wants a change to his current version? you are working on two features and the customer decides to abandon one of them? you have two teams working on different feature sets and their changes start interfering with each other? I just use labels instead of branches? That's a lot of “what if’s”, but there is a simple way of preventing this. Branching… In TFS, labels are not immutable. This does not mean they are not useful. But labels do not provide a very good development isolation mechanism. Branching allows separate code sets to evolve separately (e.g. Current with hotfixes, and vNext with new development). I don’t see how labels work here. - Bill Heys, VS ALM Ranger & TFS Branching Lead, Microsoft   Figure: Creating a single feature branch means you can isolate the development work on that branch.   Its standard practice for large projects with lots of developers to use Feature branching and you can check the Branching Guidance for the latest recommendations from the Visual Studio ALM Rangers for other methods. In the diagram above you can see my recommendation for branching when using Scrum development with TFS 2010. It consists of a single Sprint branch to contain all the changes for the current sprint. The main branch has the permissions changes so contributors to the project can only Branch and Merge with “Main”. This will prevent accidental check-ins or checkouts of the “Main” line that would contaminate the code. The developers continue to develop on sprint one until the completion of the sprint. Note: In the real world, starting a new Greenfield project, this process starts at Sprint 2 as at the start of Sprint 1 you would have artifacts in version control and no need for isolation.   Figure: Once the sprint is complete the Sprint 1 code can then be merged back into the Main line. There are always good practices to follow, and one is to always do a Forward Integration from Main into Sprint 1 before you do a Reverse Integration from Sprint 1 back into Main. In this case it may seem superfluous, but this builds good muscle memory into your developer’s work ethic and means that no bad habits are learned that would interfere with additional Scrum Teams being added to the Product. The process of completing your sprint development: The Team completes their work according to their definition of done. Merge from “Main” into “Sprint1” (Forward Integration) Stabilize your code with any changes coming from other Scrum Teams working on the same product. If you have one Scrum Team this should be quick, but there may have been bug fixes in the Release branches. (we will talk about release branches later) Merge from “Sprint1” into “Main” to commit your changes. (Reverse Integration) Check-in Delete the Sprint1 branch Note: The Sprint 1 branch is no longer required as its useful life has been concluded. Check-in Done But you are not yet done with the Sprint. The goal in Scrum is to have a “potentially shippable product” at the end of every Sprint, and we do not have that yet, we only have finished code.   Figure: With Sprint 1 merged you can create a Release branch and run your final packaging and testing In 99% of all projects I have been involved in or watched, a “shippable product” only happens towards the end of the overall lifecycle, especially when sprints are short. The in-between releases are great demonstration releases, but not shippable. Perhaps it comes from my 80’s brain washing that we only ship when we reach the agreed quality and business feature bar. - Willy-Peter Schaub, VS ALM Ranger, Microsoft Although you should have been testing and packaging your code all the way through your Sprint 1 development, preferably using an automated process, you still need to test and package with stable unchanging code. This is where you do what at SSW we call a “Test Please”. This is first an internal test of the product to make sure it meets the needs of the customer and you generally use a resource external to your Team. Then a “Test Please” is conducted with the Product Owner to make sure he is happy with the output. You can read about how to conduct a Test Please on our Rules to Successful Projects: Do you conduct an internal "test please" prior to releasing a version to a client?   Figure: If you find a deviation from the expected result you fix it on the Release branch. If during your final testing or your “Test Please” you find there are issues or bugs then you should fix them on the release branch. If you can’t fix them within the time box of your Sprint, then you will need to create a Bug and put it onto the backlog for prioritization by the Product owner. Make sure you leave plenty of time between your merge from the development branch to find and fix any problems that are uncovered. This process is commonly called Stabilization and should always be conducted once you have completed all of your User Stories and integrated all of your branches. Even once you have stabilized and released, you should not delete the release branch as you would with the Sprint branch. It has a usefulness for servicing that may extend well beyond the limited life you expect of it. Note: Don't get forced by the business into adding features into a Release branch instead that indicates the unspoken requirement is that they are asking for a product spin-off. In this case you can create a new Team Project and branch from the required Release branch to create a new Main branch for that product. And you create a whole new backlog to work from.   Figure: When the Team decides it is happy with the product you can create a RTM branch. Once you have fixed all the bugs you can, and added any you can’t to the Product Backlog, and you Team is happy with the result you can create a Release. This would consist of doing the final Build and Packaging it up ready for your Sprint Review meeting. You would then create a read-only branch that represents the code you “shipped”. This is really an Audit trail branch that is optional, but is good practice. You could use a Label, but Labels are not Auditable and if a dispute was raised by the customer you can produce a verifiable version of the source code for an independent party to check. Rare I know, but you do not want to be at the wrong end of a legal battle. Like the Release branch the RTM branch should never be deleted, or only deleted according to your companies legal policy, which in the UK is usually 7 years.   Figure: If you have made any changes in the Release you will need to merge back up to Main in order to finalise the changes. Nothing is really ever done until it is in Main. The same rules apply when merging any fixes in the Release branch back into Main and you should do a reverse merge before a forward merge, again for the muscle memory more than necessity at this stage. Your Sprint is now nearly complete, and you can have a Sprint Review meeting knowing that you have made every effort and taken every precaution to protect your customer’s investment. Note: In order to really achieve protection for both you and your client you would add Automated Builds, Automated Tests, Automated Acceptance tests, Acceptance test tracking, Unit Tests, Load tests, Web test and all the other good engineering practices that help produce reliable software.     Figure: After the Sprint Planning meeting the process begins again. Where the Sprint Review and Retrospective meetings mark the end of the Sprint, the Sprint Planning meeting marks the beginning. After you have completed your Sprint Planning and you know what you are trying to achieve in Sprint 2 you can create your new Branch to develop in. How do we handle a bug(s) in production that can’t wait? Although in Scrum the only work done should be on the backlog there should be a little buffer added to the Sprint Planning for contingencies. One of these contingencies is a bug in the current release that can’t wait for the Sprint to finish. But how do you handle that? Willy-Peter Schaub asked an excellent question on the release activities: In reality Sprint 2 starts when sprint 1 ends + weekend. Should we not cater for a possible parallelism between Sprint 2 and the release activities of sprint 1? It would introduce FI’s from main to sprint 2, I guess. Your “Figure: Merging print 2 back into Main.” covers, what I tend to believe to be reality in most cases. - Willy-Peter Schaub, VS ALM Ranger, Microsoft I agree, and if you have a single Scrum team then your resources are limited. The Scrum Team is responsible for packaging and release, so at least one run at stabilization, package and release should be included in the Sprint time box. If more are needed on the current production release during the Sprint 2 time box then resource needs to be pulled from Sprint 2. The Product Owner and the Team have four choices (in order of disruption/cost): Backlog: Add the bug to the backlog and fix it in the next Sprint Buffer Time: Use any buffer time included in the current Sprint to fix the bug quickly Make time: Remove a Story from the current Sprint that is of equal value to the time lost fixing the bug(s) and releasing. Note: The Team must agree that it can still meet the Sprint Goal. Cancel Sprint: Cancel the sprint and concentrate all resource on fixing the bug(s) Note: This can be a very costly if the current sprint has already had a lot of work completed as it will be lost. The choice will depend on the complexity and severity of the bug(s) and both the Product Owner and the Team need to agree. In this case we will go with option #2 or #3 as they are uncomplicated but severe bugs. Figure: Real world issue where a bug needs fixed in the current release. If the bug(s) is urgent enough then then your only option is to fix it in place. You can edit the release branch to find and fix the bug, hopefully creating a test so it can’t happen again. Follow the prior process and conduct an internal and customer “Test Please” before releasing. You can read about how to conduct a Test Please on our Rules to Successful Projects: Do you conduct an internal "test please" prior to releasing a version to a client?   Figure: After you have fixed the bug you need to ship again. You then need to again create an RTM branch to hold the version of the code you released in escrow.   Figure: Main is now out of sync with your Release. We now need to get these new changes back up into the Main branch. Do a reverse and then forward merge again to get the new code into Main. But what about the branch, are developers not working on Sprint 2? Does Sprint 2 now have changes that are not in Main and Main now have changes that are not in Sprint 2? Well, yes… and this is part of the hit you take doing branching. But would this scenario even have been possible without branching?   Figure: Getting the changes in Main into Sprint 2 is very important. The Team now needs to do a Forward Integration merge into their Sprint and resolve any conflicts that occur. Maybe the bug has already been fixed in Sprint 2, maybe the bug no longer exists! This needs to be identified and resolved by the developers before they continue to get further out of Sync with Main. Note: Avoid the “Big bang merge” at all costs.   Figure: Merging Sprint 2 back into Main, the Forward Integration, and R0 terminates. Sprint 2 now merges (Reverse Integration) back into Main following the procedures we have already established.   Figure: The logical conclusion. This then allows the creation of the next release. By now you should be getting the big picture and hopefully you learned something useful from this post. I know I have enjoyed writing it as I find these exploratory posts coupled with real world experience really help harden my understanding.  Branching is a tool; it is not a silver bullet. Don’t over use it, and avoid “Anti-Patterns” where possible. Although the diagram above looks complicated I hope showing you how it is formed simplifies it as much as possible.   Technorati Tags: Branching,Scrum,VS ALM,TFS 2010,VS2010

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  • C# Java Objective-C need expert advices

    - by Kevino
    Which platform as the edge today in 2012 with the rise of cloud computing, mobile development and the revolution of HTML5/Javascript between J2EE, .Net framework and IOS Objective-C ??? I want to start learning 1 language between Java, C# and Objective-C and get back into programming after 14 years and I don't know which to choose I need expert advices... I already know a little C++ and I remember my concepts in example pointers arithmetic, class etc so I tend to prefer learning C# and Objective-C but I've been told by some experienced programmers that Windows 8 could flop and .Net could be going away slowly since C++ and Html5/Javascript could be king in mobile is that true ? and that C# is more advanced compared to Java with Linq/Lambda... but not truly as portable if we consider android, etc but Java as a lot going for him too Scala, Clojure, Groovy, JRuby, JPython etc etc so I am lost Please help me, and don't close this right away I really need help and expert advices thanks you very much ANSWER : ElYusubov : thanks for everything please continue with the answers/explanations I just did some native C++ in dos mode in 1998 before Cli and .Net I don't know the STL,Templates, Win32 or COM but I remember a little the concept of memory management and oop etc I already played around a little with C# 1.0 in 2002 but things changed a lot with linq and lambda... I am here because I talked with some experienced programmers and authors of some the best selling programming books like apress wrox and deitel and they told me a few things are likely to happen like .Net could be on his way out because of Html5/Javascript combo could kill xaml and C++ native apps on mobile dev will outperform them by a lot... Secondly ios and android are getting so popular that mobile dev is the future so Objective-C is very hard to ignore so why get tied down in Windows long term (.Net) compared to Java (android)... but again android is very fragmented, they also said Windows 8 RT will give you access to only a small part of the .Net framework... so that's what they think so I don't know which direction to choose I wanted to learn C# & .Net but what if it die off or Windows 8 flop Windows Phone marketshare really can't compare to ios... so I'll be stuck that's why I worry is Java safer long term or more versatile if you want 'cause of the support for android ??

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  • Emperors don’t come cheap

    - by RoyOsherove
    “Sorry” I replied in a polite email. “Maybe next year, when budgets allow for this”. It was addressed to the organizer of TechEd US, which was to be in New Orleans this year. Man, I would have loved to be in new Orleans this year, but, I guess these guys only understand one language – and I won’t be their puppy any more. You see, they wouldn’t pay for my business class flight to TechEd from Israel. Me– the great emperor of unit testing?! travelling coach for 12 hours? No thanks. I have better things to do! And this is after last year, they only invited me to have one talk throughout the conference. one talk. After the year before I was on the top ten speakers list of that conference?! No sir! They did give it a good try, though. They said they can pay up to 4,000$ per flight cost for me, and that they only found a flight at about 5460$. “Unacceptable” I told them when they asked if I would pay the difference. And that was that. Goodbye teched. As I closed up gmail, wondering if I should have told them that I found a similar flight at 4,300$, and came back to the living room, I told my wife, all full of myself “I just canceled teched”. “Oh good” she said. Not even looking at me as she tried to feed our one year old. “did you tell them you need to cancel because you already have another flight that month and your wife won’t let you travel more than once a month anymore?” “Yeah right” I said. Just what I need – for people to realize I’m totally whipped. I still need an ounce of dignity. “I told those bastards that if they want me they have to make an effort. People like me don’t come cheap, you know?” “You’re an idiot for not telling them the real reason.” She handed me the baby.  “What if they found a flight that matches their budget? How would you have gotten away from that engagement?” . She put on “Lost” on the media center and sat next to me. I did not reply.

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  • Quick guide to Oracle IRM 11g: Classification design

    - by Simon Thorpe
    Quick guide to Oracle IRM 11g indexThis is the final article in the quick guide to Oracle IRM. If you've followed everything prior you will now have a fully functional and tested Information Rights Management service. It doesn't matter if you've been following the 10g or 11g guide as this next article is common to both. ContentsWhy this is the most important part... Understanding the classification and standard rights model Identifying business use cases Creating an effective IRM classification modelOne single classification across the entire businessA context for each and every possible granular use caseWhat makes a good context? Deciding on the use of roles in the context Reviewing the features and security for context roles Summary Why this is the most important part...Now the real work begins, installing and getting an IRM system running is as simple as following instructions. However to actually have an IRM technology easily protecting your most sensitive information without interfering with your users existing daily work flows and be able to scale IRM across the entire business, requires thought into how confidential documents are created, used and distributed. This article is going to give you the information you need to ask the business the right questions so that you can deploy your IRM service successfully. The IRM team here at Oracle have over 10 years of experience in helping customers and it is important you understand the following to be successful in securing access to your most confidential information. Whatever you are trying to secure, be it mergers and acquisitions information, engineering intellectual property, health care documentation or financial reports. No matter what type of user is going to access the information, be they employees, contractors or customers, there are common goals you are always trying to achieve.Securing the content at the earliest point possible and do it automatically. Removing the dependency on the user to decide to secure the content reduces the risk of mistakes significantly and therefore results a more secure deployment. K.I.S.S. (Keep It Simple Stupid) Reduce complexity in the rights/classification model. Oracle IRM lets you make changes to access to documents even after they are secured which allows you to start with a simple model and then introduce complexity once you've understood how the technology is going to be used in the business. After an initial learning period you can review your implementation and start to make informed decisions based on user feedback and administration experience. Clearly communicate to the user, when appropriate, any changes to their existing work practice. You must make every effort to make the transition to sealed content as simple as possible. For external users you must help them understand why you are securing the documents and inform them the value of the technology to both your business and them. Before getting into the detail, I must pay homage to Martin White, Vice President of client services in SealedMedia, the company Oracle acquired and who created Oracle IRM. In the SealedMedia years Martin was involved with every single customer and was key to the design of certain aspects of the IRM technology, specifically the context model we will be discussing here. Listening carefully to customers and understanding the flexibility of the IRM technology, Martin taught me all the skills of helping customers build scalable, effective and simple to use IRM deployments. No matter how well the engineering department designed the software, badly designed and poorly executed projects can result in difficult to use and manage, and ultimately insecure solutions. The advice and information that follows was born with Martin and he's still delivering IRM consulting with customers and can be found at www.thinkers.co.uk. It is from Martin and others that Oracle not only has the most advanced, scalable and usable document security solution on the market, but Oracle and their partners have the most experience in delivering successful document security solutions. Understanding the classification and standard rights model The goal of any successful IRM deployment is to balance the increase in security the technology brings without over complicating the way people use secured content and avoid a significant increase in administration and maintenance. With Oracle it is possible to automate the protection of content, deploy the desktop software transparently and use authentication methods such that users can open newly secured content initially unaware the document is any different to an insecure one. That is until of course they attempt to do something for which they don't have any rights, such as copy and paste to an insecure application or try and print. Central to achieving this objective is creating a classification model that is simple to understand and use but also provides the right level of complexity to meet the business needs. In Oracle IRM the term used for each classification is a "context". A context defines the relationship between.A group of related documents The people that use the documents The roles that these people perform The rights that these people need to perform their role The context is the key to the success of Oracle IRM. It provides the separation of the role and rights of a user from the content itself. Documents are sealed to contexts but none of the rights, user or group information is stored within the content itself. Sealing only places information about the location of the IRM server that sealed it, the context applied to the document and a few other pieces of metadata that pertain only to the document. This important separation of rights from content means that millions of documents can be secured against a single classification and a user needs only one right assigned to be able to access all documents. If you have followed all the previous articles in this guide, you will be ready to start defining contexts to which your sensitive information will be protected. But before you even start with IRM, you need to understand how your own business uses and creates sensitive documents and emails. Identifying business use cases Oracle is able to support multiple classification systems, but usually there is one single initial need for the technology which drives a deployment. This need might be to protect sensitive mergers and acquisitions information, engineering intellectual property, financial documents. For this and every subsequent use case you must understand how users create and work with documents, to who they are distributed and how the recipients should interact with them. A successful IRM deployment should start with one well identified use case (we go through some examples towards the end of this article) and then after letting this use case play out in the business, you learn how your users work with content, how well your communication to the business worked and if the classification system you deployed delivered the right balance. It is at this point you can start rolling the technology out further. Creating an effective IRM classification model Once you have selected the initial use case you will address with IRM, you need to design a classification model that defines the access to secured documents within the use case. In Oracle IRM there is an inbuilt classification system called the "context" model. In Oracle IRM 11g it is possible to extend the server to support any rights classification model, but the majority of users who are not using an application integration (such as Oracle IRM within Oracle Beehive) are likely to be starting out with the built in context model. Before looking at creating a classification system with IRM, it is worth reviewing some recognized standards and methods for creating and implementing security policy. A very useful set of documents are the ISO 17799 guidelines and the SANS security policy templates. First task is to create a context against which documents are to be secured. A context consists of a group of related documents (all top secret engineering research), a list of roles (contributors and readers) which define how users can access documents and a list of users (research engineers) who have been given a role allowing them to interact with sealed content. Before even creating the first context it is wise to decide on a philosophy which will dictate the level of granularity, the question is, where do you start? At a department level? By project? By technology? First consider the two ends of the spectrum... One single classification across the entire business Imagine that instead of having separate contexts, one for engineering intellectual property, one for your financial data, one for human resources personally identifiable information, you create one context for all documents across the entire business. Whilst you may have immediate objections, there are some significant benefits in thinking about considering this. Document security classification decisions are simple. You only have one context to chose from! User provisioning is simple, just make sure everyone has a role in the only context in the business. Administration is very low, if you assign rights to groups from the business user repository you probably never have to touch IRM administration again. There are however some obvious downsides to this model.All users in have access to all IRM secured content. So potentially a sales person could access sensitive mergers and acquisition documents, if they can get their hands on a copy that is. You cannot delegate control of different documents to different parts of the business, this may not satisfy your regulatory requirements for the separation and delegation of duties. Changing a users role affects every single document ever secured. Even though it is very unlikely a business would ever use one single context to secure all their sensitive information, thinking about this scenario raises one very important point. Just having one single context and securing all confidential documents to it, whilst incurring some of the problems detailed above, has one huge value. Once secured, IRM protected content can ONLY be accessed by authorized users. Just think of all the sensitive documents in your business today, imagine if you could ensure that only everyone you trust could open them. Even if an employee lost a laptop or someone accidentally sent an email to the wrong recipient, only the right people could open that file. A context for each and every possible granular use case Now let's think about the total opposite of a single context design. What if you created a context for each and every single defined business need and created multiple contexts within this for each level of granularity? Let's take a use case where we need to protect engineering intellectual property. Imagine we have 6 different engineering groups, and in each we have a research department, a design department and manufacturing. The company information security policy defines 3 levels of information sensitivity... restricted, confidential and top secret. Then let's say that each group and department needs to define access to information from both internal and external users. Finally add into the mix that they want to review the rights model for each context every financial quarter. This would result in a huge amount of contexts. For example, lets just look at the resulting contexts for one engineering group. Q1FY2010 Restricted Internal - Engineering Group 1 - Research Q1FY2010 Restricted Internal - Engineering Group 1 - Design Q1FY2010 Restricted Internal - Engineering Group 1 - Manufacturing Q1FY2010 Restricted External- Engineering Group 1 - Research Q1FY2010 Restricted External - Engineering Group 1 - Design Q1FY2010 Restricted External - Engineering Group 1 - Manufacturing Q1FY2010 Confidential Internal - Engineering Group 1 - Research Q1FY2010 Confidential Internal - Engineering Group 1 - Design Q1FY2010 Confidential Internal - Engineering Group 1 - Manufacturing Q1FY2010 Confidential External - Engineering Group 1 - Research Q1FY2010 Confidential External - Engineering Group 1 - Design Q1FY2010 Confidential External - Engineering Group 1 - Manufacturing Q1FY2010 Top Secret Internal - Engineering Group 1 - Research Q1FY2010 Top Secret Internal - Engineering Group 1 - Design Q1FY2010 Top Secret Internal - Engineering Group 1 - Manufacturing Q1FY2010 Top Secret External - Engineering Group 1 - Research Q1FY2010 Top Secret External - Engineering Group 1 - Design Q1FY2010 Top Secret External - Engineering Group 1 - Manufacturing Now multiply the above by 6 for each engineering group, 18 contexts. You are then creating/reviewing another 18 every 3 months. After a year you've got 72 contexts. What would be the advantages of such a complex classification model? You can satisfy very granular rights requirements, for example only an authorized engineering group 1 researcher can create a top secret report for access internally, and his role will be reviewed on a very frequent basis. Your business may have very complex rights requirements and mapping this directly to IRM may be an obvious exercise. The disadvantages of such a classification model are significant...Huge administrative overhead. Someone in the business must manage, review and administrate each of these contexts. If the engineering group had a single administrator, they would have 72 classifications to reside over each year. From an end users perspective life will be very confusing. Imagine if a user has rights in just 6 of these contexts. They may be able to print content from one but not another, be able to edit content in 2 contexts but not the other 4. Such confusion at the end user level causes frustration and resistance to the use of the technology. Increased synchronization complexity. Imagine a user who after 3 years in the company ends up with over 300 rights in many different contexts across the business. This would result in long synchronization times as the client software updates all your offline rights. Hard to understand who can do what with what. Imagine being the VP of engineering and as part of an internal security audit you are asked the question, "What rights to researchers have to our top secret information?". In this complex model the answer is not simple, it would depend on many roles in many contexts. Of course this example is extreme, but it highlights that trying to build many barriers in your business can result in a nightmare of administration and confusion amongst users. In the real world what we need is a balance of the two. We need to seek an optimum number of contexts. Too many contexts are unmanageable and too few contexts does not give fine enough granularity. What makes a good context? Good context design derives mainly from how well you understand your business requirements to secure access to confidential information. Some customers I have worked with can tell me exactly the documents they wish to secure and know exactly who should be opening them. However there are some customers who know only of the government regulation that requires them to control access to certain types of information, they don't actually know where the documents are, how they are created or understand exactly who should have access. Therefore you need to know how to ask the business the right questions that lead to information which help you define a context. First ask these questions about a set of documentsWhat is the topic? Who are legitimate contributors on this topic? Who are the authorized readership? If the answer to any one of these is significantly different, then it probably merits a separate context. Remember that sealed documents are inherently secure and as such they cannot leak to your competitors, therefore it is better sealed to a broad context than not sealed at all. Simplicity is key here. Always revert to the first extreme example of a single classification, then work towards essential complexity. If there is any doubt, always prefer fewer contexts. Remember, Oracle IRM allows you to change your mind later on. You can implement a design now and continue to change and refine as you learn how the technology is used. It is easy to go from a simple model to a more complex one, it is much harder to take a complex model that is already embedded in the work practice of users and try to simplify it. It is also wise to take a single use case and address this first with the business. Don't try and tackle many different problems from the outset. Do one, learn from the process, refine it and then take what you have learned into the next use case, refine and continue. Once you have a good grasp of the technology and understand how your business will use it, you can then start rolling out the technology wider across the business. Deciding on the use of roles in the context Once you have decided on that first initial use case and a context to create let's look at the details you need to decide upon. For each context, identify; Administrative rolesBusiness owner, the person who makes decisions about who may or may not see content in this context. This is often the person who wanted to use IRM and drove the business purchase. They are the usually the person with the most at risk when sensitive information is lost. Point of contact, the person who will handle requests for access to content. Sometimes the same as the business owner, sometimes a trusted secretary or administrator. Context administrator, the person who will enact the decisions of the Business Owner. Sometimes the point of contact, sometimes a trusted IT person. Document related rolesContributors, the people who create and edit documents in this context. Reviewers, the people who are involved in reviewing documents but are not trusted to secure information to this classification. This role is not always necessary. (See later discussion on Published-work and Work-in-Progress) Readers, the people who read documents from this context. Some people may have several of the roles above, which is fine. What you are trying to do is understand and define how the business interacts with your sensitive information. These roles obviously map directly to roles available in Oracle IRM. Reviewing the features and security for context roles At this point we have decided on a classification of information, understand what roles people in the business will play when administrating this classification and how they will interact with content. The final piece of the puzzle in getting the information for our first context is to look at the permissions people will have to sealed documents. First think why are you protecting the documents in the first place? It is to prevent the loss of leaking of information to the wrong people. To control the information, making sure that people only access the latest versions of documents. You are not using Oracle IRM to prevent unauthorized people from doing legitimate work. This is an important point, with IRM you can erect many barriers to prevent access to content yet too many restrictions and authorized users will often find ways to circumvent using the technology and end up distributing unprotected originals. Because IRM is a security technology, it is easy to get carried away restricting different groups. However I would highly recommend starting with a simple solution with few restrictions. Ensure that everyone who reasonably needs to read documents can do so from the outset. Remember that with Oracle IRM you can change rights to content whenever you wish and tighten security. Always return to the fact that the greatest value IRM brings is that ONLY authorized users can access secured content, remember that simple "one context for the entire business" model. At the start of the deployment you really need to aim for user acceptance and therefore a simple model is more likely to succeed. As time passes and users understand how IRM works you can start to introduce more restrictions and complexity. Another key aspect to focus on is handling exceptions. If you decide on a context model where engineering can only access engineering information, and sales can only access sales data. Act quickly when a sales manager needs legitimate access to a set of engineering documents. Having a quick and effective process for permitting other people with legitimate needs to obtain appropriate access will be rewarded with acceptance from the user community. These use cases can often be satisfied by integrating IRM with a good Identity & Access Management technology which simplifies the process of assigning users the correct business roles. The big print issue... Printing is often an issue of contention, users love to print but the business wants to ensure sensitive information remains in the controlled digital world. There are many cases of physical document loss causing a business pain, it is often overlooked that IRM can help with this issue by limiting the ability to generate physical copies of digital content. However it can be hard to maintain a balance between security and usability when it comes to printing. Consider the following points when deciding about whether to give print rights. Oracle IRM sealed documents can contain watermarks that expose information about the user, time and location of access and the classification of the document. This information would reside in the printed copy making it easier to trace who printed it. Printed documents are slower to distribute in comparison to their digital counterparts, so time sensitive information in printed format may present a lower risk. Print activity is audited, therefore you can monitor and react to users abusing print rights. Summary In summary it is important to think carefully about the way you create your context model. As you ask the business these questions you may get a variety of different requirements. There may be special projects that require a context just for sensitive information created during the lifetime of the project. There may be a department that requires all information in the group is secured and you might have a few senior executives who wish to use IRM to exchange a small number of highly sensitive documents with a very small number of people. Oracle IRM, with its very flexible context classification system, can support all of these use cases. The trick is to introducing the complexity to deliver them at the right level. In another article i'm working on I will go through some examples of how Oracle IRM might map to existing business use cases. But for now, this article covers all the important questions you need to get your IRM service deployed and successfully protecting your most sensitive information.

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  • Measuring Social Media Efforts

    - by David Dorf
    So you're on the bandwagon and you've created a Facebook page, you're tweeting everyday, and maybe you've even got a YouTube channel. Now what? After you put any program in place, you need to measure, set new goals, then execute and this is no different. But how does one measure social media efforts? First, I guess we need some goals. Typical ones might be to acquire customers, engage them, then convert them. So that translates to: Increase Facebook fans and Twitter followers Increase comments/posting and retweets Increase redemption of offers via Facebook and Twitter Counting fans and followers is easy, and tracking the redemption of coupons isn't that hard either, but measuring engagement is a tough one. How do you know whether your fans are reading your posts, and whether your posts have any meaning to them? For Facebook, the fan page administrator has access to analytics called Facebook Insights. There you can check weekly metrics such as total fans, new fans, lost fans, demographics of fans, number of postings, numbers clicks, etc. Not nearly as comprehensive as Google Analytics, but well on its way. For Twitter, getting information is a little tougher. Again, its easy to track followers and you can use tools like TweetMeme to encourage and track retweets. An interesting website called WeFollow tries to measure influence for certain topics. For example, the top three influencers for the topic "retail" are retailweek, retailwire, and retailerdaily. Other notables are #10 BestBuy, #11 GapOfficial, #12 JeffPR, and #17 OracleRetail. I assume influence is calculated based on number of followers, number of retweets, frequency of tweets, and perhaps depth of dialogs. If you want to get serious about monitoring and measuring social marketing efforts, you'd be wise to invest in a strong tool. Several are listed on this wiki, including big ones like Radian6, Nielsen, Omniture, and Buzzient. Buzzient might be particularly interesting because its integrated with Oracle CRM OnDemand -- see the demo. As always, I'm interested in hearing how others approach goal setting and monitoring of social media efforts, so feel free to post comments.

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  • SOA, Cloud and Service Technology Symposium a super success!

    - by JuergenKress
    SOA, Cloud and Service Technology Symposium in London was a huge success. More than 600 international attendees participated in it. Our SOA & BPM Community had a great presence there. At joint booth with the Specialized partners link consulting, eProseed and Griffiths Waite, we presented the latest product updates and had many interesting discussions with customers and speakers. Special thanks to our HQ product management team Demed, Tim, Manas for coming over right before OOW. Also a very big Thank to Matthias Ziegler from Accenture for presenting our joint presentation individually! If you missed the conference here are the key presentations links for your reference: Big Data and its impact on SOA Demed L'Her [View PDF] Building 21st Century Service-Oriented Airports Shyam Kumar [View PDF] Building Cloudy Services Anne Thomas Manes [View PDF] Community Management: The Next Wave of SOA Governance and API Management Tim E. Hall [View PDF] Elastic SOA in the Cloud Steve Millidge [View PDF] Governing Shared Services: On-Premise & In the Cloud Thomas Erl [View Video] Introducing the Cloud Computing Design Patterns Catalogue Thomas Erl and Amin Naserpour [CloudPatterns.org] Lost in Translation - Common Mistakes Interpreting Patterns Mark Simpson [View PDF] Moving Applications to the Cloud: Migration Options Anne Thomas Manes [View PDF] New Paradigms for Application Architecture: From Applications to IT Services Anne Thomas Manes [View PDF] NoSQL for Data Services, Data Virtualization & Big Data Guido Schmutz [View PDF] A Pragmatic Approach to Cloud Computing Andrea Morena [View PDF] The Successful Execution of the SOA and BPM Vision Using a Business Capability Framework: Concepts and Examples Clemens Utschig and Manas Deb [View PDF] Service Modeling & BPM Business Value Patterns Matthias Ziegler [View PDF] [Podcast] SOA Adoption in the Brazilian Ministry of Health - Case Study Ricardo Puttini and Andre Toffanello [PDF Coming Soon] SOA Environments are a Big Data Problem Markus Zirn, Splunk and Maciej Barcz [View PDF] SOA Governance at EDP: A Global Energy Company Manuel Rosa [View PDF] For all presentations please visit the SOA, Cloud and Service Technology Symposium Website SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit  www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Technorati Tags: SOA Symposium,Thomas Erl,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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  • The embarrassingly obvious about SQL Server CE

    - by Edward Boyle
    I have been working with SQL servers in one form or another for almost two decades now. But I am new to SQL Server Compact Edition. In the past weeks I have been working with SQL Serve CE a lot. The SQL, not a problem, but the engine itself is very new to me. One of the issues I ran into was a simple SQL statement taking excusive amounts of time; by excessive, I mean over one second. I wrote a little code to time the method. Sometimes it took under one second, other times as long as three seconds. –But it was a simple update statement! As embarrassing as it is, why it was slow eluded me. I posted my issue to MSDN and I got a reply from ErikEJ (MS MVP) who runs the blog “Everything SQL Server Compact” . I know little to nothing about SQL Server Compact. This guy is completely obsessed very well versed in CE. If you spend any time in MSDN forums, it seems that this guy single handedly has the answer for every CE question that comes up. Anyway, he said: “Opening a connection to a SQL Server Compact database file is a costly operation, keep one connection open per thread (incl. your UI thread) in your app, the one on the UI thread should live for the duration of your app.” It hit me, all databases have some connection overhead and SQL Server CE is not a database engine running as a service drinking Jolt Cola waiting for someone to talk to him so he can spring into action and show off his quarter-mile sprint capabilities. Imagine if you had to start the SQL Server process every time you needed to make a database connection. Principally, that is what you are doing with SQL Server CE. For someone who has worked with Enterprise Level SQL Servers a lot, I had to come to the mental image that my Open connection to SQL Server CE is basically starting a service, my own private service, and by closing the connection, I am shutting down my little private service. After making the changes in my code, I lost any reservations I had with using CE. At present, my Data Access Layer class has a constructor; in that constructor I open my connection, I also have OpenConnection and CloseConnection methods, I also implemented IDisposable and clean up any connections in Dispose(). I am still finalizing how this assembly will function. – That’s beside the point. All I’m trying to say is: “Opening a connection to a SQL Server Compact database file is a costly operation”

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  • Unable to transfer data to or from mounted hard drive

    - by user210335
    So usually i'm good at sorting out issues. But this one has me at a loss! This issues has occured since upgrading my ubuntu so this was workingg prior. I use mounted hard drives to manage my downloads which are then copied over accordingly by a python based app. I found it was having issues with permissions to create anything on these mounted hard drives. I'm able to play and access he content of these drives so they're not faulty. My mount script looks like the following rw,user,exec,auto I really am stuck. Could anyone shed any light on how to fix this and allow me to access it. I've checked the properties and all groups should have read and write access so i'm very confused! thanks, edit here's the output of my mount options /dev/sda2 on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/cgroup type tmpfs (rw) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) none on /sys/firmware/efi/efivars type efivarfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755) none on /sys/fs/pstore type pstore (rw) /dev/sda1 on /boot/efi type vfat (rw) /dev/sdc1 on /mnt/tv type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096) /dev/sdb1 on /mnt/B88A30E88A30A4B2 type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096) systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd) gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=simon) /dev/sdd1 on /media/simon/New Volume3 type fuseblk (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096) the main mount in question is /dev/sdc1 on /mnt/tv type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096) heres my dmesg output. I tried cchanging permissions in a terminal and I got an io error. [52803.343417] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.343420] sd 2:0:0:0: [sdc] CDB: [52803.343422] Read(10): 28 00 00 60 9e 3f 00 00 08 00 [52803.343805] sd 2:0:0:0: [sdc] Unhandled error code [52803.343808] sd 2:0:0:0: [sdc] [52803.343810] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.343812] sd 2:0:0:0: [sdc] CDB: [52803.343813] Read(10): 28 00 00 67 64 67 00 00 08 00 [52803.344389] sd 2:0:0:0: [sdc] Unhandled error code [52803.344392] sd 2:0:0:0: [sdc] [52803.344394] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.344396] sd 2:0:0:0: [sdc] CDB: [52803.344397] Read(10): 28 00 09 bd e7 6f 00 00 08 00 [52803.344584] sd 2:0:0:0: [sdc] Unhandled error code [52803.344587] sd 2:0:0:0: [sdc] [52803.344589] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.344591] sd 2:0:0:0: [sdc] CDB: [52803.344592] Read(10): 28 00 07 3a cf b7 00 00 08 00 [52803.344776] sd 2:0:0:0: [sdc] Unhandled error code [52803.344779] sd 2:0:0:0: [sdc] [52803.344781] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.344783] sd 2:0:0:0: [sdc] CDB: [52803.344784] Read(10): 28 00 09 bd e7 97 00 00 08 00 [52803.344973] sd 2:0:0:0: [sdc] Unhandled error code [52803.344976] sd 2:0:0:0: [sdc] [52803.344978] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.344980] sd 2:0:0:0: [sdc] CDB: [52803.344981] Read(10): 28 00 08 dd 57 ef 00 00 08 00 [52803.346745] sd 2:0:0:0: [sdc] Unhandled error code [52803.346748] sd 2:0:0:0: [sdc] [52803.346750] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.346752] sd 2:0:0:0: [sdc] CDB: [52803.346754] Read(10): 28 00 07 1a c1 0f 00 00 08 00 [52803.349939] sd 2:0:0:0: [sdc] Unhandled error code [52803.349942] sd 2:0:0:0: [sdc] [52803.349944] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.349946] sd 2:0:0:0: [sdc] CDB: [52803.349948] Read(10): 28 00 00 67 64 9f 00 00 08 00 [52803.350147] sd 2:0:0:0: [sdc] Unhandled error code [52803.350150] sd 2:0:0:0: [sdc] [52803.350152] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.350154] sd 2:0:0:0: [sdc] CDB: [52803.350155] Read(10): 28 00 00 67 64 97 00 00 08 00 [52803.351302] sd 2:0:0:0: [sdc] Unhandled error code [52803.351305] sd 2:0:0:0: [sdc] [52803.351307] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.351309] sd 2:0:0:0: [sdc] CDB: [52803.351311] Read(10): 28 00 00 a4 1d cf 00 00 08 00 [52803.351894] sd 2:0:0:0: [sdc] Unhandled error code [52803.351897] sd 2:0:0:0: [sdc] [52803.351899] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.351901] sd 2:0:0:0: [sdc] CDB: [52803.351902] Read(10): 28 00 00 67 67 3f 00 00 08 00 [52803.353163] sd 2:0:0:0: [sdc] Unhandled error code [52803.353166] sd 2:0:0:0: [sdc] [52803.353168] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.353170] sd 2:0:0:0: [sdc] CDB: [52803.353172] Read(10): 28 00 00 67 64 ef 00 00 08 00 [52803.353917] sd 2:0:0:0: [sdc] Unhandled error code [52803.353920] sd 2:0:0:0: [sdc] [52803.353922] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.353924] sd 2:0:0:0: [sdc] CDB: [52803.353925] Read(10): 28 00 00 67 65 17 00 00 08 00 [52803.354484] sd 2:0:0:0: [sdc] Unhandled error code [52803.354487] sd 2:0:0:0: [sdc] [52803.354489] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.354491] sd 2:0:0:0: [sdc] CDB: [52803.354492] Read(10): 28 00 07 1a d8 9f 00 00 08 00 [52803.355005] sd 2:0:0:0: [sdc] Unhandled error code [52803.355010] sd 2:0:0:0: [sdc] [52803.355013] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.355017] sd 2:0:0:0: [sdc] CDB: [52803.355019] Read(10): 28 00 00 67 65 3f 00 00 08 00 [52803.355293] sd 2:0:0:0: [sdc] Unhandled error code [52803.355298] sd 2:0:0:0: [sdc] [52803.355301] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.355305] sd 2:0:0:0: [sdc] CDB: [52803.355308] Read(10): 28 00 00 a4 20 27 00 00 08 00 [52803.355575] sd 2:0:0:0: [sdc] Unhandled error code [52803.355580] sd 2:0:0:0: [sdc] [52803.355583] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.355587] sd 2:0:0:0: [sdc] CDB: [52803.355589] Read(10): 28 00 00 5d dc 67 00 00 08 00 [52803.356647] sd 2:0:0:0: [sdc] Unhandled error code [52803.356650] sd 2:0:0:0: [sdc] [52803.356652] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.356654] sd 2:0:0:0: [sdc] CDB: [52803.356655] Read(10): 28 00 07 1a dd 3f 00 00 08 00 [52803.357108] sd 2:0:0:0: [sdc] Unhandled error code [52803.357111] sd 2:0:0:0: [sdc] [52803.357113] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.357115] sd 2:0:0:0: [sdc] CDB: [52803.357116] Read(10): 28 00 00 67 65 97 00 00 08 00 [52803.357298] sd 2:0:0:0: [sdc] Unhandled error code [52803.357300] sd 2:0:0:0: [sdc] [52803.357302] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.357304] sd 2:0:0:0: [sdc] CDB: [52803.357306] Read(10): 28 00 07 1a 04 d7 00 00 08 00 [52803.360374] sd 2:0:0:0: [sdc] Unhandled error code [52803.360377] sd 2:0:0:0: [sdc] [52803.360379] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.360382] sd 2:0:0:0: [sdc] CDB: [52803.360383] Read(10): 28 00 00 67 65 b7 00 00 08 00 [52803.360581] sd 2:0:0:0: [sdc] Unhandled error code [52803.360584] sd 2:0:0:0: [sdc] [52803.360586] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.360588] sd 2:0:0:0: [sdc] CDB: [52803.360589] Read(10): 28 00 00 67 65 c7 00 00 08 00 [52803.361352] sd 2:0:0:0: [sdc] Unhandled error code [52803.361355] sd 2:0:0:0: [sdc] [52803.361357] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.361359] sd 2:0:0:0: [sdc] CDB: [52803.361360] Read(10): 28 00 09 bd e1 af 00 00 08 00 [52803.362096] sd 2:0:0:0: [sdc] Unhandled error code [52803.362099] sd 2:0:0:0: [sdc] [52803.362101] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.362103] sd 2:0:0:0: [sdc] CDB: [52803.362104] Read(10): 28 00 07 0a 64 e7 00 00 08 00 [52803.362555] sd 2:0:0:0: [sdc] Unhandled error code [52803.362558] sd 2:0:0:0: [sdc] [52803.362560] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.362562] sd 2:0:0:0: [sdc] CDB: [52803.362563] Read(10): 28 00 00 67 65 d7 00 00 08 00 [52803.362747] sd 2:0:0:0: [sdc] Unhandled error code [52803.362750] sd 2:0:0:0: [sdc] [52803.362752] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.362754] sd 2:0:0:0: [sdc] CDB: [52803.362755] Read(10): 28 00 01 4c 12 6f 00 00 08 00 [52803.362977] sd 2:0:0:0: [sdc] Unhandled error code [52803.362980] sd 2:0:0:0: [sdc] [52803.362982] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.362984] sd 2:0:0:0: [sdc] CDB: [52803.362985] Read(10): 28 00 03 85 43 7f 00 00 08 00 [52803.365197] sd 2:0:0:0: [sdc] Unhandled error code [52803.365200] sd 2:0:0:0: [sdc] [52803.365202] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.365204] sd 2:0:0:0: [sdc] CDB: [52803.365206] Read(10): 28 00 07 15 46 4f 00 00 08 00 [52803.365524] sd 2:0:0:0: [sdc] Unhandled error code [52803.365527] sd 2:0:0:0: [sdc] [52803.365528] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.365531] sd 2:0:0:0: [sdc] CDB: [52803.365532] Read(10): 28 00 07 11 78 8f 00 00 08 00 [52803.369355] sd 2:0:0:0: [sdc] Unhandled error code [52803.369360] sd 2:0:0:0: [sdc] [52803.369362] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.369365] sd 2:0:0:0: [sdc] CDB: [52803.369366] Read(10): 28 00 09 bd e2 8f 00 00 08 00 [52803.370806] sd 2:0:0:0: [sdc] Unhandled error code [52803.370809] sd 2:0:0:0: [sdc] [52803.370811] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.370814] sd 2:0:0:0: [sdc] CDB: [52803.370815] Read(10): 28 00 07 1a c6 37 00 00 08 00 [52803.371630] sd 2:0:0:0: [sdc] Unhandled error code [52803.371634] sd 2:0:0:0: [sdc] [52803.371636] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.371639] sd 2:0:0:0: [sdc] CDB: [52803.371640] Read(10): 28 00 00 67 66 57 00 00 08 00 [52803.371863] sd 2:0:0:0: [sdc] Unhandled error code [52803.371867] sd 2:0:0:0: [sdc] [52803.371868] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.371871] sd 2:0:0:0: [sdc] CDB: [52803.371872] Read(10): 28 00 00 64 0b df 00 00 08 00 [52803.373467] sd 2:0:0:0: [sdc] Unhandled error code [52803.373470] sd 2:0:0:0: [sdc] [52803.373472] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.373474] sd 2:0:0:0: [sdc] CDB: [52803.373476] Read(10): 28 00 00 60 83 7f 00 00 08 00 [52803.373655] sd 2:0:0:0: [sdc] Unhandled error code [52803.373658] sd 2:0:0:0: [sdc] [52803.373660] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.373662] sd 2:0:0:0: [sdc] CDB: [52803.373663] Read(10): 28 00 00 60 83 7f 00 00 08 00 [52803.374063] sd 2:0:0:0: [sdc] Unhandled error code [52803.374066] sd 2:0:0:0: [sdc] [52803.374068] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.374070] sd 2:0:0:0: [sdc] CDB: [52803.374071] Read(10): 28 00 08 db d5 5f 00 00 08 00 [52803.374602] sd 2:0:0:0: [sdc] Unhandled error code [52803.374605] sd 2:0:0:0: [sdc] [52803.374607] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.374609] sd 2:0:0:0: [sdc] CDB: [52803.374611] Read(10): 28 00 07 1a bf a7 00 00 08 00 [52803.375259] sd 2:0:0:0: [sdc] Unhandled error code [52803.375264] sd 2:0:0:0: [sdc] [52803.375267] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.375270] sd 2:0:0:0: [sdc] CDB: [52803.375272] Read(10): 28 00 00 67 66 87 00 00 08 00 [52803.375515] sd 2:0:0:0: [sdc] Unhandled error code [52803.375520] sd 2:0:0:0: [sdc] [52803.375522] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.375526] sd 2:0:0:0: [sdc] CDB: [52803.375527] Read(10): 28 00 00 62 54 8f 00 00 08 00 [52803.378506] sd 2:0:0:0: [sdc] Unhandled error code [52803.378513] sd 2:0:0:0: [sdc] [52803.378516] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.378520] sd 2:0:0:0: [sdc] CDB: [52803.378522] Read(10): 28 00 00 67 66 bf 00 00 08 00 [52803.381048] sd 2:0:0:0: [sdc] Unhandled error code [52803.381054] sd 2:0:0:0: [sdc] [52803.381057] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.381061] sd 2:0:0:0: [sdc] CDB: [52803.381063] Read(10): 28 00 00 60 ae 77 00 00 08 00 [52803.381238] sd 2:0:0:0: [sdc] Unhandled error code [52803.381242] sd 2:0:0:0: [sdc] [52803.381245] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.381248] sd 2:0:0:0: [sdc] CDB: [52803.381250] Read(10): 28 00 00 60 ae 77 00 00 08 00 [52803.381382] sd 2:0:0:0: [sdc] Unhandled error code [52803.381386] sd 2:0:0:0: [sdc] [52803.381388] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.381392] sd 2:0:0:0: [sdc] CDB: [52803.381394] Read(10): 28 00 00 60 ae 77 00 00 08 00 [52803.381569] sd 2:0:0:0: [sdc] Unhandled error code [52803.381573] sd 2:0:0:0: [sdc] [52803.381575] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.381579] sd 2:0:0:0: [sdc] CDB: [52803.381581] Read(10): 28 00 00 60 ae 77 00 00 08 00 [52803.382295] sd 2:0:0:0: [sdc] Unhandled error code [52803.382300] sd 2:0:0:0: [sdc] [52803.382302] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.382306] sd 2:0:0:0: [sdc] CDB: [52803.382307] Read(10): 28 00 00 67 6a 87 00 00 08 00 [52803.382552] sd 2:0:0:0: [sdc] Unhandled error code [52803.382556] sd 2:0:0:0: [sdc] [52803.382558] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.382562] sd 2:0:0:0: [sdc] CDB: [52803.382564] Read(10): 28 00 00 67 6a af 00 00 08 00 [52803.382794] sd 2:0:0:0: [sdc] Unhandled error code [52803.382798] sd 2:0:0:0: [sdc] [52803.382801] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.382804] sd 2:0:0:0: [sdc] CDB: [52803.382806] Read(10): 28 00 00 67 6a c7 00 00 08 00 [52803.383269] sd 2:0:0:0: [sdc] Unhandled error code [52803.383274] sd 2:0:0:0: [sdc] [52803.383277] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.383280] sd 2:0:0:0: [sdc] CDB: [52803.383282] Read(10): 28 00 00 67 6a f7 00 00 08 00 [52803.383556] sd 2:0:0:0: [sdc] Unhandled error code [52803.383560] sd 2:0:0:0: [sdc] [52803.383563] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.383566] sd 2:0:0:0: [sdc] CDB: [52803.383568] Read(10): 28 00 00 67 6b 2f 00 00 08 00 [52803.386185] sd 2:0:0:0: [sdc] Unhandled error code [52803.386191] sd 2:0:0:0: [sdc] [52803.386194] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.386198] sd 2:0:0:0: [sdc] CDB: [52803.386200] Read(10): 28 00 01 4c 1b bf 00 00 08 00 [52803.386454] sd 2:0:0:0: [sdc] Unhandled error code [52803.386458] sd 2:0:0:0: [sdc] [52803.386461] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.386465] sd 2:0:0:0: [sdc] CDB: [52803.386467] Read(10): 28 00 07 1a b4 1f 00 00 08 00 [52803.388320] sd 2:0:0:0: [sdc] Unhandled error code [52803.388324] sd 2:0:0:0: [sdc] [52803.388326] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.388328] sd 2:0:0:0: [sdc] CDB: [52803.388329] Read(10): 28 00 09 bd de 17 00 00 08 00 [52803.388836] sd 2:0:0:0: [sdc] Unhandled error code [52803.388838] sd 2:0:0:0: [sdc] [52803.388839] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.388841] sd 2:0:0:0: [sdc] CDB: [52803.388842] Read(10): 28 00 07 57 9f ff 00 00 08 00 [52803.389124] sd 2:0:0:0: [sdc] Unhandled error code [52803.389126] sd 2:0:0:0: [sdc] [52803.389127] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.389129] sd 2:0:0:0: [sdc] CDB: [52803.389130] Read(10): 28 00 00 67 6b 8f 00 00 08 00 [52803.389244] sd 2:0:0:0: [sdc] Unhandled error code [52803.389246] sd 2:0:0:0: [sdc] [52803.389248] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.389249] sd 2:0:0:0: [sdc] CDB: [52803.389250] Read(10): 28 00 07 e9 ee ff 00 00 08 00 [52803.390386] sd 2:0:0:0: [sdc] Unhandled error code [52803.390389] sd 2:0:0:0: [sdc] [52803.390390] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.390392] sd 2:0:0:0: [sdc] CDB: [52803.390393] Read(10): 28 00 07 1a be 0f 00 00 08 00 [52803.390682] sd 2:0:0:0: [sdc] Unhandled error code [52803.390685] sd 2:0:0:0: [sdc] [52803.390686] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.390688] sd 2:0:0:0: [sdc] CDB: [52803.390689] Read(10): 28 00 00 67 6b e7 00 00 08 00 [52803.390804] sd 2:0:0:0: [sdc] Unhandled error code [52803.390806] sd 2:0:0:0: [sdc] [52803.390808] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.390809] sd 2:0:0:0: [sdc] CDB: [52803.390810] Read(10): 28 00 07 ed 17 bf 00 00 08 00 [52803.391449] sd 2:0:0:0: [sdc] Unhandled error code [52803.391451] sd 2:0:0:0: [sdc] [52803.391452] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.391454] sd 2:0:0:0: [sdc] CDB: [52803.391455] Read(10): 28 00 09 bd e5 9f 00 00 08 00 [52803.391956] sd 2:0:0:0: [sdc] Unhandled error code [52803.391958] sd 2:0:0:0: [sdc] [52803.391960] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.391961] sd 2:0:0:0: [sdc] CDB: [52803.391962] Read(10): 28 00 00 b5 86 a7 00 00 08 00 [52803.392293] sd 2:0:0:0: [sdc] Unhandled error code [52803.392295] sd 2:0:0:0: [sdc] [52803.392296] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.392298] sd 2:0:0:0: [sdc] CDB: [52803.392299] Read(10): 28 00 07 18 bf bf 00 00 08 00 [52803.392843] sd 2:0:0:0: [sdc] Unhandled error code [52803.392845] sd 2:0:0:0: [sdc] [52803.392846] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.392848] sd 2:0:0:0: [sdc] CDB: [52803.392849] Read(10): 28 00 00 60 b3 1f 00 00 08 00 [52803.392929] sd 2:0:0:0: [sdc] Unhandled error code [52803.392931] sd 2:0:0:0: [sdc] [52803.392932] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.392934] sd 2:0:0:0: [sdc] CDB: [52803.392935] Read(10): 28 00 00 60 b3 1f 00 00 08 00 [52803.393057] sd 2:0:0:0: [sdc] Unhandled error code [52803.393059] sd 2:0:0:0: [sdc] [52803.393060] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.393062] sd 2:0:0:0: [sdc] CDB: [52803.393063] Read(10): 28 00 00 60 83 9f 00 00 08 00 [52803.393286] sd 2:0:0:0: [sdc] Unhandled error code [52803.393288] sd 2:0:0:0: [sdc] [52803.393289] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.393291] sd 2:0:0:0: [sdc] CDB: [52803.393292] Read(10): 28 00 00 67 6b bf 00 00 08 00 [52803.393720] sd 2:0:0:0: [sdc] Unhandled error code [52803.393722] sd 2:0:0:0: [sdc] [52803.393723] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.393725] sd 2:0:0:0: [sdc] CDB: [52803.393725] Read(10): 28 00 00 60 b2 17 00 00 08 00 [52803.393806] sd 2:0:0:0: [sdc] Unhandled error code [52803.393808] sd 2:0:0:0: [sdc] [52803.393809] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.393810] sd 2:0:0:0: [sdc] CDB: [52803.393811] Read(10): 28 00 00 60 b2 17 00 00 08 00 [52803.393892] sd 2:0:0:0: [sdc] Unhandled error code [52803.393894] sd 2:0:0:0: [sdc] [52803.393895] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.393896] sd 2:0:0:0: [sdc] CDB: [52803.393897] Read(10): 28 00 00 60 b2 17 00 00 08 00 [52803.393974] sd 2:0:0:0: [sdc] Unhandled error code [52803.393976] sd 2:0:0:0: [sdc] [52803.393977] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.393978] sd 2:0:0:0: [sdc] CDB: [52803.393979] Read(10): 28 00 00 60 b2 17 00 00 08 00 [52803.394298] sd 2:0:0:0: [sdc] Unhandled error code [52803.394300] sd 2:0:0:0: [sdc] [52803.394302] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.394303] sd 2:0:0:0: [sdc] CDB: [52803.394304] Read(10): 28 00 00 5d a6 a7 00 00 08 00 [52803.395577] sd 2:0:0:0: [sdc] Unhandled error code [52803.395580] sd 2:0:0:0: [sdc] [52803.395582] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.395584] sd 2:0:0:0: [sdc] CDB: [52803.395585] Read(10): 28 00 00 00 01 9f 00 00 08 00 [52803.395721] sd 2:0:0:0: [sdc] Unhandled error code [52803.395724] sd 2:0:0:0: [sdc] [52803.395725] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.395726] sd 2:0:0:0: [sdc] CDB: [52803.395727] Read(10): 28 00 00 00 01 67 00 00 08 00 [52803.395843] sd 2:0:0:0: [sdc] Unhandled error code [52803.395845] sd 2:0:0:0: [sdc] [52803.395846] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.395847] sd 2:0:0:0: [sdc] CDB: [52803.395848] Read(10): 28 00 02 a8 33 77 00 00 08 00 [52803.395960] sd 2:0:0:0: [sdc] Unhandled error code [52803.395962] sd 2:0:0:0: [sdc] [52803.395963] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.395965] sd 2:0:0:0: [sdc] CDB: [52803.395965] Read(10): 28 00 00 b5 ae 7f 00 00 08 00 [52803.396077] sd 2:0:0:0: [sdc] Unhandled error code [52803.396079] sd 2:0:0:0: [sdc] [52803.396080] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.396082] sd 2:0:0:0: [sdc] CDB: [52803.396083] Read(10): 28 00 00 63 64 bf 00 00 08 00 [52803.396193] sd 2:0:0:0: [sdc] Unhandled error code [52803.396195] sd 2:0:0:0: [sdc] [52803.396196] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.396198] sd 2:0:0:0: [sdc] CDB: [52803.396199] Read(10): 28 00 07 1a e2 e7 00 00 08 00 [52803.396313] sd 2:0:0:0: [sdc] Unhandled error code [52803.396315] sd 2:0:0:0: [sdc] [52803.396316] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.396318] sd 2:0:0:0: [sdc] CDB: [52803.396319] Read(10): 28 00 07 1a b9 87 00 00 08 00 [52803.396435] sd 2:0:0:0: [sdc] Unhandled error code [52803.396437] sd 2:0:0:0: [sdc] [52803.396438] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.396439] sd 2:0:0:0: [sdc] CDB: [52803.396441] Read(10): 28 00 02 ce 8e df 00 00 08 00 [52803.396555] sd 2:0:0:0: [sdc] Unhandled error code [52803.396557] sd 2:0:0:0: [sdc] [52803.396558] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.396560] sd 2:0:0:0: [sdc] CDB: [52803.396561] Read(10): 28 00 0e 66 6d f7 00 00 08 00 [52803.396769] sd 2:0:0:0: [sdc] Unhandled error code [52803.396770] sd 2:0:0:0: [sdc] [52803.396772] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.396773] sd 2:0:0:0: [sdc] CDB: [52803.396774] Read(10): 28 00 07 1a e4 2f 00 00 08 00 [52803.396886] sd 2:0:0:0: [sdc] Unhandled error code [52803.396888] sd 2:0:0:0: [sdc] [52803.396889] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.396890] sd 2:0:0:0: [sdc] CDB: [52803.396891] Read(10): 28 00 00 63 d4 3f 00 00 08 00 [52803.397002] sd 2:0:0:0: [sdc] Unhandled error code [52803.397004] sd 2:0:0:0: [sdc] [52803.397005] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.397007] sd 2:0:0:0: [sdc] CDB: [52803.397007] Read(10): 28 00 07 1a e4 1f 00 00 08 00 [52803.400074] sd 2:0:0:0: [sdc] Unhandled error code [52803.400078] sd 2:0:0:0: [sdc] [52803.400079] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.400081] sd 2:0:0:0: [sdc] CDB: [52803.400082] Read(10): 28 00 07 16 c7 5f 00 00 08 00 [52803.400318] sd 2:0:0:0: [sdc] Unhandled error code [52803.400320] sd 2:0:0:0: [sdc] [52803.400322] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.400323] sd 2:0:0:0: [sdc] CDB: [52803.400324] Read(10): 28 00 00 60 01 87 00 00 08 00 [52803.400408] sd 2:0:0:0: [sdc] Unhandled error code [52803.400410] sd 2:0:0:0: [sdc] [52803.400412] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.400413] sd 2:0:0:0: [sdc] CDB: [52803.400414] Read(10): 28 00 00 60 01 0f 00 00 08 00 [52803.400564] sd 2:0:0:0: [sdc] Unhandled error code [52803.400566] sd 2:0:0:0: [sdc] [52803.400568] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.400569] sd 2:0:0:0: [sdc] CDB: [52803.400570] Read(10): 28 00 00 5d d1 d7 00 00 08 00 [52803.400841] sd 2:0:0:0: [sdc] Unhandled error code [52803.400843] sd 2:0:0:0: [sdc] [52803.400844] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.400846] sd 2:0:0:0: [sdc] CDB: [52803.400847] Read(10): 28 00 07 1a e3 47 00 00 08 00 [52803.401151] sd 2:0:0:0: [sdc] Unhandled error code [52803.401153] sd 2:0:0:0: [sdc] [52803.401155] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.401156] sd 2:0:0:0: [sdc] CDB: [52803.401157] Read(10): 28 00 07 1a b9 1f 00 00 08 00 [52803.401310] sd 2:0:0:0: [sdc] Unhandled error code [52803.401312] sd 2:0:0:0: [sdc] [52803.401313] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.401315] sd 2:0:0:0: [sdc] CDB: [52803.401316] Read(10): 28 00 00 a4 1b 57 00 00 08 00 [52803.401877] sd 2:0:0:0: [sdc] Unhandled error code [52803.401879] sd 2:0:0:0: [sdc] [52803.401880] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.401881] sd 2:0:0:0: [sdc] CDB: [52803.401882] Read(10): 28 00 0e 66 35 47 00 00 08 00 [52803.402032] sd 2:0:0:0: [sdc] Unhandled error code [52803.402033] sd 2:0:0:0: [sdc] [52803.402034] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.402036] sd 2:0:0:0: [sdc] CDB: [52803.402037] Read(10): 28 00 06 30 69 ff 00 00 08 00 [52803.402148] sd 2:0:0:0: [sdc] Unhandled error code [52803.402150] sd 2:0:0:0: [sdc] [52803.402151] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.402153] sd 2:0:0:0: [sdc] CDB: [52803.402154] Read(10): 28 00 09 bd d8 77 00 00 08 00 [52803.402263] sd 2:0:0:0: [sdc] Unhandled error code [52803.402265] sd 2:0:0:0: [sdc] [52803.402266] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.402267] sd 2:0:0:0: [sdc] CDB: [52803.402268] Read(10): 28 00 00 5d ff 77 00 00 08 00 [52803.402376] sd 2:0:0:0: [sdc] Unhandled error code [52803.402378] sd 2:0:0:0: [sdc] [52803.402379] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.402381] sd 2:0:0:0: [sdc] CDB: [52803.402382] Read(10): 28 00 00 5d ff 7f 00 00 08 00 [52803.402490] sd 2:0:0:0: [sdc] Unhandled error code [52803.402492] sd 2:0:0:0: [sdc] [52803.402493] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.402495] sd 2:0:0:0: [sdc] CDB: [52803.402496] Read(10): 28 00 00 00 01 2f 00 00 08 00 [52803.402602] sd 2:0:0:0: [sdc] Unhandled error code [52803.402604] sd 2:0:0:0: [sdc] [52803.402605] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.402607] sd 2:0:0:0: [sdc] CDB: [52803.402608] Read(10): 28 00 00 b5 ac 8f 00 00 08 00 [52803.402715] sd 2:0:0:0: [sdc] Unhandled error code [52803.402717] sd 2:0:0:0: [sdc] [52803.402719] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.402720] sd 2:0:0:0: [sdc] CDB: [52803.402721] Read(10): 28 00 00 e1 18 ff 00 00 08 00 [52803.402829] sd 2:0:0:0: [sdc] Unhandled error code [52803.402831] sd 2:0:0:0: [sdc] [52803.402833] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.402834] sd 2:0:0:0: [sdc] CDB: [52803.402835] Read(10): 28 00 09 bd ea cf 00 00 08 00 [52803.403999] sd 2:0:0:0: [sdc] Unhandled error code [52803.404001] sd 2:0:0:0: [sdc] [52803.404003] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52803.404005] sd 2:0:0:0: [sdc] CDB: [52803.404006] Read(10): 28 00 07 1a b8 f7 00 00 08 00 [52832.950225] sd 2:0:0:0: [sdc] Unhandled error code [52832.950230] sd 2:0:0:0: [sdc] [52832.950233] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52832.950235] sd 2:0:0:0: [sdc] CDB: [52832.950237] Write(10): 2a 00 00 60 bf 7f 00 00 08 00 [52832.950247] blk_update_request: 1077 callbacks suppressed [52832.950250] end_request: I/O error, dev sdc, sector 6340479 [52832.950253] quiet_error: 1077 callbacks suppressed [52832.950256] Buffer I/O error on device sdc1, logical block 792552 [52832.950258] lost page write due to I/O error on sdc1 [52832.950269] sd 2:0:0:0: [sdc] Unhandled error code [52832.950272] sd 2:0:0:0: [sdc] [52832.950273] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [52832.950276] sd 2:0:0:0: [sdc] CDB: [52832.950277] Write(10): 2a 00 01 a5 f1 4f 00 00 08 00 [52832.950285] end_request: I/O error, dev sdc, sector 27652431 [52832.950287] Buffer I/O error on device sdc1, logical block 3456546 [52832.950289] lost page write due to I/O error on sdc1

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  • E 2.0 Value Metaphors

    - by Tom Tonkin
    I guess I have been doing this too long. I can easily see the value of Enterprise 2.0 technology for an organization, but find it a challenge at times to convey that same value to others. I also know that I'm not the only one that has that issue. Others, that have that same passion, also suffer from being, perhaps, too close to the market. I was having this same discussion with a few colleagues when one of them suggested that metaphors might be a good vehicle to communicate the value to those that are not as familiar.  One such metaphor was discussed.Apparently,back in the early 50's, there was a great Air Force aviator and military strategist by the name of John Boyd.  Without going into a ton of detail (you can search him on the internet), what made Colonel Boyd great was that he never lost a dog fight.  As a matter of fact, they called him 'Forty-Second Boyd' since he claimed to be able to beat anyone in any type of aircraft in less than forty seconds, even if his aircraft was inferior to his opponents.His approach as was unique.  He observed over time that there was a pattern on how aviators  engaged in a dogfight.  He called this method OODA.   It describes how a person or, in our case, an organization, would react to an event.  OODA is an acrostic for Observation, Orientation, Decision and Action.  Again, there is a lot more on the internet about this.A pilot would go through this loop several times during a dogfight and Boyd would try to predict this loop and interrupt it by changing the landscape of the actual dogfight.  This would give Boyd an advantage and be able to predict what his opponent would do and then counterattack.Boyd went on to say that many companies have a similar reaction loop and that by understanding that loop, organizations would be able to adjust better to market conditions, predict what the competition is doing and reposition themselves to gain competitive advantages. So, our metaphor would be that Enterprise 2.0 provides companies greater visibility of their business by connecting to employees, customers and partners in a collaborative fashion.  This, in turn, helps them navigate through the tough times and provide lines of sight to more innovative ideas.  Innovation is that last tool for companies to achieve competitive advantage (maybe a discusion for another post).Perhaps this is more wordy than some other metaphor, but it does allow for an interesting  dialogue to start and maybe even a framwork to fullfill the promise of E 2.0. So, I'm sure there are many more metaphors for the value that E 2.0 brings to organzaitons. Do you have one to share? Please comment below and thanks for stopping by.

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  • JRockit R28/JRockit Mission Control 4.0 is out!

    - by Marcus Hirt
    The next major release of JRockit is finally out! Here are some highlights: Includes the all new JRockit Flight Recorder – supersedes the old JRockit Runtime Analyser. The new flight recorder is inspired by the “black box” in airplanes. It uses a highly efficient recording engine and thread local buffers to capture data about the runtime and the application running in the JVM. It can be configured to always be on, so that whenever anything “interesting” happens, data can be dumped for some time back. Think of it as your own personal profiling time machine. Automatic shortest path calculation in Memleak – no longer any need for running around in circles when trying to find your way back to a thread root from an instance. Memleak can now show class loader related information and split graphs on a per class loader basis. More easily configured JMX agent – default port for both RMI Registry and RMI Server can be configured, and is by default the same, allowing easier configuration of firewalls. Up to 64 GB (was 4GB) compressed references. Per thread allocation profiling in the Management Console. Native Memory Tracking – it is now possible to track native memory allocations with very high resolution. The information can either be accessed using JRCMD, or the dedicated Native Memory Tracking experimental plug-in for the Management Console (alas only available for the upcoming 4.0.1 release). JRockit can now produce heap dumps in HPROF format. Cooperative suspension – JRockit is no longer using system signals for stopping threads, which could lead to hangs if signals were lost or blocked (for example bad NFS shares). Now threads check periodically to see if they are suspended. VPAT/Section 508 compliant JRMC – greatly improved keyboard navigation and screen reader support. See New and Noteworthy for more information. JRockit Mission Control 4.0.0 can be downloaded from here: http://www.oracle.com/technology/software/products/jrockit/index.html <shameless ad> There is even a book to go with JRMC 4.0.0/JRockit R28! http://www.packtpub.com/oracle-jrockit-the-definitive-guide/book/ </shameless ad>

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  • Challenges in multi-player Android Game Server with RESTful Nature

    - by Kush
    I'm working on an Android Game based on Contract Bridge, as a part of my college Summer Internship project. The game will be multi-player such that 4 Android devices can play it, so there's no BOT or CPU player to be developed. At the time of getting project, I realized that most of the students had already worked on the project but none of their works is reusable now (for variety of reasons like, undocumented code and design architecture, different platform implementation). I have experience working on several open source projects and hence I emphasis to work out on this project such that components I make become reusable as much as possible. Now, as the game is multi-player and entire game progress will be handled on server, I'm currently working on Server's design, since I wanted to make game server reusable such that any client platform can use it, I was previously confused in selecting Socket or REST for Game Server's design, but later finalized to work on REST APIs for the server. Now, since I have to keep all players in-sync while they make movements in game, on server I've planned to use Database which will keep all players' progress, specific for each table (in Bridge, 4 players play on single table, and server will handle many such game tables). I don't know if its an appropriate decision to use database as shared medium to track progress of each game table (let me know if there's an appropriate or better option). Obviously, when game is completed for the table, data for that table on server's database is discarded. Now the problem is that, access to REST service is an HTTP call, so as long as client doesn't make any request, server will remain idle, and consider a situation where A player has played a card on his device and the device requests to apply this change on the server. Now, I need to let rest of the three devices know that the player has played a card, and also update view on their device. AFAIK, REST cannot provide a sort-of Push-notification system, since the connection to the server is not persistent. One solution that I thought was to make each device constantly poll the server for any change (like every 56 ms) and when changes are found, reflect it on the device. But I feel this is not an elegant way, as every HTTP request is expensive. (and I choose REST to make game play experience robust since, a mobile device tends to get disconnected from Internet, and if there's Socket-like persistent connection then entire game progress is subject to lost. Also, portability on client-end is important) Also, imagining a situation where 10 game tables are in progress and 40 players are playing, a server must be capable to handle flooded HTTP requests from all the devices which make it every 56 ms. So I wonder if the situation is assumed as DoS attack. So, explaining the situation, am I going on the right track for the server design? I wanted to be sure before I proceed much further with the code.

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  • Emoti-phrases

    - by Tony Davis
    Surely the next radical step in the development of User-interface design is for applications to react appropriately to the rising tide of bewilderment, frustration or antipathy of the users. When an application understands that rapport is lost, it should respond accordingly. When we, for example, become confused by an unforgiving interface, shouldn't there be a way of signalling our bewilderment and having the application respond appropriately? There is surprisingly little in the current interface standards that would help. If we're getting frustrated with an unresponsive application, perhaps we could let it know of our increasing irritation by means of an "I'm getting angry and exasperated" slider. Although, by 'responding appropriately', I don't include playing a "we are experiencing unusually heavy traffic: your application usage is important to us" message, accompanied by calming muzak. When confronted with a tide of wizards, 'are you sure?' messages, or page-after-page of tiresome and barely-relevant options, how one yearns for a handy 'JFDI' (Just Flaming Do It) button. One click and the application miraculously desists with its annoying questions and just gets on with the job, using the defaults, or whatever we selected last time. Much more satisfying, and more direct to most developers and DBAs, however, would be the facility to communicate to the application via a twitter-style input field, or via parameters to command-line applications ("I don't want a wide-ranging debate with you; just open the bl**dy PDF!" or, or "Don't forget which of us has the close button"). Although to avoid too much cultural-dependence, perhaps we should take the lead from emoticons, and use a set of standardized emoti-phrases such as 'sez you', 'huh?', 'Pshaw!', or 'meh', which could be used to vent a range of feelings in any given application, whether it be SQL Server stubbornly refusing to give us the result we are expecting, or when an online-survey is getting too personal. Or a 'Lingua Glaswegia' perhaps: 'Atsabelter' ("very good") 'Atspish' ("must try harder") 'AnThenYerArsFellAff ' ("I don't quite trust these results") 'BileYerHeid' or 'ShutYerGub' ("please stop these inane questions") There would, of course, have to be an ANSI standards body to define the phrases that were acceptable. Presumably, there would be a tussle amongst the different international standards organizations. Meanwhile Oracle, Microsoft and Apple would each release non-standard extensions. Time then, surely, to plant emoti-phrases on the lot of them and develop a user-driven consensus. Send us your suggestions! The best one will win an iPod nano! Cheers! Tony.

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  • Paying by Cash

    - by David Dorf
    I'll grant you paying by cash in the context of stores isn't particularly interesting, but in my quest to try new payment methods I decided to pay by cash at an online store. Using a credit card means I have to hoist myself off the couch, find the card, and enter all those digits. Google Checkout certainly makes that task easier by storing my credit card information, but what happens to all those people that don't have a credit card? What about the ones that are afraid to use credit cards over the internet. There are three main options for cash payment, not all of which are accepted by every merchant. The most popular is PayPal. The issue I have with them is that returns and disputes have to be handled with PayPal, not the merchant. I once used PayPal at a shady online store and lost my money. Yeah, my bad but they wouldn't help me at all. PayPal was purchased by eBay in 2002. BillMeLater is best for larger purchases, because at checkout they actually run a credit check to make sure you're credit worthy. Assuming you are, they pay the merchant on your behalf and mail you a bill, which you better pay quickly or interest will start to accrue. That's nice for the merchant because they get paid right away, and I presume there's no charge-backs. BillMeLater was purchased by eBay in 2008. Last night I tried eBillMe for the first time. After checkout, they send you a bill via email and expect you to pay either via online banking (they provide the instructions to set everything up) or walk-in locations across the US (typically banks). The process was quick and easy. The merchant doesn't ship the product until the bill is paid, so there's a day or two delay. For the merchant there are no charge-backs, and the fees are less than credit cards. For the shopper, they provide buyer protection similar to that offered by credit cards, and 1% cashback on purchases. Once the online bill-pay is setup, its easy to reuse in the future. Seems like a win-win for merchants and shoppers.

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  • Programming doesn&rsquo;t have to be Magic

    - by Wes McClure
    In the show LOST, the Swan Station had a button that “had to be pushed” every 100 minutes to avoid disaster.  Several characters in the show took it upon themselves to have faith and religiously push the button, resetting the clock and averting the unknown “disaster”.  There are striking similarities in this story to the code we write every day.  Here are some common ones that I encounter: “I don’t know what it does but the application doesn’t work without it” “I added that code because I saw it in other similar places, I didn’t understand it, but thought it was necessary.” (for consistency, or to make things “work”) “An error message recommended it” “I copied that code” (and didn’t look at what it was doing) “It was suggested in a forum online and it fixed my problem so I left it” In all of these cases we haven’t done our due diligence to understand what the code we are writing is actually doing.  In the rush to get things done it seems like we’re willing to push any button (add any line of code) just to get our desired result and move on.  All of the above explanations are common things we encounter, and are valid ways to work through a problem we have, but when we find a solution to a task we are working on (whether a bug or a feature), we should take a moment to reflect on what we don’t understand.  Remove what isn’t necessary, comprehend and simplify what is.  Why is it detrimental to commit code we don’t understand? Perpetuates unnecessary code If you copy code that isn’t necessary, someone else is more likely to do so, especially peers Perpetuates tech debt Adding unnecessary code leads to extra code that must be understood, maintained and eventually cleaned up in longer lived projects Tech debt begets tech debt as other developers copy or use this code as guidelines in similar situations Increases maintenance How do we know the code is simplified if we don’t understand it? Perpetuates a lack of ownership Makes it seem ok to commit anything so long as it “gets the job done” Perpetuates the notion that programming is magic If we don’t take the time to understand every line of code we add, then we are contributing to the notion that it is simply enough to make the code work, regardless of how. TLDR Don’t commit code that you don’t understand, take the time to understand it, simplify it and then commit it!

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  • Innovation and the Role of Social Media

    - by Brian Dirking
    A very interesting post by Andy Mulholland of CAP Gemini this week – “The CIO is trapped between the CEO wanting innovation and the CFO needing compliance” – had many interesting points: “A successful move in one area won’t be recognized and rapidly implemented in other areas to multiply the benefits, or worse unsuccessful ideas will get repeated adding to the cost and time wasted. That’s where the need to really address the combination of social networking, collaboration, knowledge management and business information is required.” Without communicating what works and what doesn’t, the innovations of our organization may be lost, and the failures repeated. That makes sense. If you liked Andy Mulholland’s blog post, you need to hear Howard Beader’s presentation at Enterprise 2.0 Conference on innovation and the role of social media. (Howard will be speaking in the Market Leaders Session at 1 PM on Wednesday June 22nd). Some of the thoughts Howard will share include: • Innovation is more than just ideas, it’s getting ideas to market, and removing the obstacles that stand in the way • Innovation is about parallel processing – you can’t remove the obstacles one by one because you will get to market too late • Innovation can be about product innovation, but it can also be about process innovation This brings us to Andy’s second issue he raises: "..the need for integration with, and visibility of, processes to understand exactly how the enterprise functions and delivers on its policies…" Andy goes on to talk about this from the perspective of compliance and the CFO’s concerns. And it’s true: innovation can come both in product innovation, but also internal process innovation. And process innovation can have as much impact as product innovation.  New supply chain models can disrupt an industry overnight. Many people ignore process innovation as a benefit of social business, because it is perceived as a bottom line rather than top line impact. But it can actually impact your top line by changing your entire business model. Oracle WebCenter sits at this crossroads between product innovation and process innovation, enabling you to drive go-to-market innovations through internal social media tools, removing obstacles in parallel, and also providing you deep insight into your processes so you can identify bottlenecks and realize whole new ways of doing business. Learn more about how at the Enterprise 2.0 Conference, where Oracle will be in booth #213 showing Oracle WebCenter and Oracle Fusion Applications.

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  • How to share two keyboard on the same laptop, french iso layout and usa ansi layout keyboard with usb?

    - by reyman64
    I recently buy a "noppoo choc mini" with this specific ANSI US-INTERNATIONAL pc84 layout. This specific keyboard have only 84 key , a 60% (compact tenkeyless) reduced layout My problem is simple, there is no keyboard layout into Ubuntu 12.04 which correspond to this usa normal ansi layout ... so it's the same problem with reduced version and only 84 key .. I search a template of normal ANSI US-INTERNATIONAL for xmodmap/xkb, and after i can try to manually map the other key. I search on google, and i don't find any other user which have same problem, so it's seem i have not the good keywoard to search this information.. Edit 1 : Here you can see there is probably a bug in ubuntu, because the layout for USA with dead key is not correct ! I have this : http://minus.com/lEdKMrsNAwkVA And other users have this for the same layout : http://i.stack.imgur.com/p52XG.png EDIT 2 It seems after a "sudo dpkg-reconfigure keyboard-configuration" : french standard keyboard pc105 + precision M65 keyboard from dell laptop Now i can see the good us layout in parameters, but i cannot have the iso layout for french usage... EDIT 3 Ok, after reboot i understand the probleme, i explain. I have one laptop with integrated french keyboard, and i want to use my usb keyboard which use a usa ANSI layout. It seem it's impossible in ubuntu and "dpkg-reconfigure keyboard-configuration" to share two different physical layout (ANSI and EU ISO) on the same computer ... EDIT4 Ok, it seems i can switch the physical layout (ISO <- ANSI) with this command in terminal : setxkbmap -layout us setxkbmap -layout us -variant alt-intl an setxkbmap -layout fr It's very complicated qnd it seem ubuntu 12.04 have big problem with keyboard manager ... because all works great with these two commands, without ANY change into the system parameters keyboard !!! Second bug ? The image of the layout for fr is buggy, the layout is not ISO, but i can press on the letter "< " at the left of right shift without any problem ! You can see the image here (french alternative with ANSI layout ? it's crazy ?) : http: //minus.com/lXsDJwoeyWAfF Can you help me on this point ? I'm lost with xkb, and manual mapping is very complicated ... Thanks a lot, SR

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  • PRUEBAS DE ESPECIALIZACION 2013/2014

    - by agallego
    Consigue  tu Certificado de Especialista Oracle  de forma GRATUITA , 27 y 28 de Noviembre de 2013  Ahora puedes realizar los exámenes de implementación de las especializaciones de Oracle y convertirte en especialista. Podrás realizar cualquiera de los exámenes de implementación de la siguiente lista: Oracle Fusion Customer Relationship Management 11g Sales Certified Implementation Specialist (1Z0-456) Oracle Fusion Customer Relationship Management 11g Incentive Compensation Certified Implementation Specialist (1Z0-472) Oracle ATG Web Commerce 10 Implementation Developer Certified Implementation Specialist (1Z0-510) Oracle RightNow CX Cloud Service 2012 Certified Implementation Specialist (1Z0-465) Oracle RightNow CX Cloud Service 2012 Developer Certified Implementation Specialist (1Z0-480) Oracle Fusion Human Capital Management 11g Human Resources Certified Implementation Specialist (1Z0-584) Oracle Fusion Human Capital Management 11g Talent Management Certified Implementation Specialist (1Z0-585) Oracle Taleo Recruiting Cloud Service 2013 Certified Implementation Specialist  (1Z0-474) Oracle Fusion Financials 11g Accounts Payable Certified Implementation Specialist(1Z0-507) Oracle Fusion Financials 11g Accounts Receivable Certified Implementation Specialist(1Z0-506) Oracle Fusion Financials 11g General Ledger Certified Implementation Specialist (1Z0-508) Oracle Fusion Distributed Order Orchestration 11g Essentials (1Z0-469) Oracle Documaker Standard Edition 12 Implementation Essentials (1Z0-570) Oracle Hyperion Planning 11 Essentials (1Z0-533) Oracle Hyperion Financial Management 11 Essentials (1Z0-532) Oracle Business Intelligence Foundation Suite 11g Essentials (1Z0-591) Oracle Essbase 11 Essentials (1Z0-531) Oracle GoldenGate 10 Essentials (1Z0-539) Oracle GoldenGate 11g Certified Implementation Exam Essentials Oracle Business Intelligence Applications 7.9.6 for CRM Essentials (1Z0-524) Oracle Business Intelligence Applications 7.9.6 for ERP Essentials (1Z0-525) Oracle Oracle Endeca Information Discovery 2.3 Certified Implementation Specialist (1Z0-461) Oracle SOA Suite 11g Essentials (1Z0-478) Oracle Service-Oriented Architecture Certified Implementation Specialist (1Z0-451) Oracle Unified Business Process Management Suite 11g Certified Implementation Specialist (1Z0-560) Oracle WebLogic Server 12c Certified Implementation Specialist (1Z0-599) Oracle Application Grid Certified Implementation Specialist(1Z0-523) Oracle WebCenter Content 11g Essentials (1Z0-542) Oracle WebCenter Portal 11g Essentials (1Z0-541) Oracle Application Development Framework Essentials (1Z1-554) Oracle Identity Governance Suite 11g Essentials(1z0-459) Oracle Access Management Suite Plus 11g Essentials Exam(1z0-479) M2M Platform Certified Architecture Essentials (1Z0-467) Oracle WebCenter Sites 11g Certified Implementation Specialist (1Z0-462)  Oracle Cloud Application Foundation Essentials(1Z0-468) Oracle Exadata 11g Essentials (1Z0-536) Exadata Database Machine Models X3-2 and X3-8 Certified Implementation Specialist (1Z0-485) Oracle Certified Expert, Oracle Exadata X3 Administration(1Z0-027) Exalogic Elastic Cloud X2-2 Certified Implementation Specialist (1Z0-569) Oracle Linux System Administration (1Z0-403) Oracle Linux Fundamentals (1Z0-402) Oracle Linux 6 Certified Implementation Specialist (1Z0-460) Oracle VM 3 for x86 Certified Implementation Specialist (1Z0-590) Oracle Enterprise Manager 11g Essentials  (1Z0-530 ) Oracle Enterprise Manager 12c Essentials (1Z0-457) SPARC T4-Based Server Installation Essentials (1Z0-597) 1Z0-821 Oracle Solaris 11 System Administration 1Z0-822 Oracle Solaris 11 Advanced System Administration Oracle Solaris 11 Installation and Configuration Essentials (1Z0-580) StorageTek Tape Libraries Certified Implementation Specialist(1Z0-546) Sun ZFS Storage Appliance Certified Implementation Specialist The Primavera P6 Enterprise Project Portfolio Management 8 Essentials (1Z0-567) The Primavera Portfolio Management Essentials (1Z0-544) Primavera Contract Management 14 Certified Implementation Specialist (1Z0-582) Oracle Utilities Customer Care and Billing 2 Certified Implementation Specialist (1Z0-562) Oracle Policy Automation 10 Certified Implementation Specialist (1Z0-534) Oracle User Productivity Kit 11 Certified Implementation Specialist (1Z0-566) Oracle User Productivity Kit 11 Technical Certified Implementation Specialist (1Z0-583) Oracle Retail Demand Forecasting 13.3 Functional Implementer Certified Implementation Specialist (1Z0-463) Oracle Retail Predictive Application Server 13 Configuration Implementation Specialist (1Z0-576) Oracle Retail Merchandising System 13.2 Foundation Functional Implementer Certified Implementation Specialist (1Z0-453) Oracle Retail Predictive Application Server 13 Configuration Implementation Specialist (1Z0-576) Oracle Retail Point-of-Service Technical Certified Implementation Specialist (1Z0-572) Oracle Retail Price Management 13.2 Functional Implementer Certified Implementation Specialist (1Z0-454) Oracle Retail Predictive Application Server 13 Configuration Implementation Specialist (1Z0-576) Oracle Retail Store Inventory Management 13.2 Functional Implementer Certified Implementation Specialist (1Z0-455) Oracle Flexcube Universal Banking 11 Technical Implementation Essentials (1Z0-579) Oracle FlexCube Universal Banking 11 Basic Implementation Essentials (1Z0-561) Oracle Flexcube Universal Banking 11 Technical Implementation Essentials (1Z0-579) Oracle FLEXCUBE Direct Banking 6 Implementation Essentials (1Z0-594)   Puedes consultar la información acerca de los examenes en cada uno de los enlaces. Para prepararte los examenes sigue la Guia de estudio que encontrarás en la página de cada examen. Requisitos: ser  Partner Gold, Platinum o Diamond de Oracle y tener un usuario de Oracle Pearson Vue.  ¿Cuándo?: 27 y 28 de noviembre  a las (9:00, 12:00, 16:00)  ¿Dónde?: Core Networks, C.E.Parque Norte, Edificio Olmo, Planta 1 Serrano Galvache 56 | 28033, Madrid Para inscribirte: Create una cuenta en Pearson Vue (www.pearsonvue.com/oracle). Para Registrarte aquí. Para más información sobre el programa de especializaciones, haz clic aquí. No pierdas esta oportunidad e inscríbete hoy.  Para cualquier duda contactar con [email protected]. Ana María Gallego Partner Enablement Manager Spain and Portugal        

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  • SQL SERVER – Introduction to PERCENTILE_DISC() – Analytic Functions Introduced in SQL Server 2012

    - by pinaldave
    SQL Server 2012 introduces new analytical function PERCENTILE_DISC(). The book online gives following definition of this function: Computes a specific percentile for sorted values in an entire rowset or within distinct partitions of a rowset in Microsoft SQL Server 2012 Release Candidate 0 (RC 0). For a given percentile value P, PERCENTILE_DISC sorts the values of the expression in the ORDER BY clause and returns the value with the smallest CUME_DIST value (with respect to the same sort specification) that is greater than or equal to P. If you are clear with understanding of the function – no need to read further. If you got lost here is the same in simple words – find value of the column which is equal or more than CUME_DIST. Before you continue reading this blog I strongly suggest you read about CUME_DIST function over here Introduction to CUME_DIST – Analytic Functions Introduced in SQL Server 2012. Now let’s have fun following query: USE AdventureWorks GO SELECT SalesOrderID, OrderQty, ProductID, CUME_DIST() OVER(PARTITION BY SalesOrderID ORDER BY ProductID ) AS CDist, PERCENTILE_DISC(0.5) WITHIN GROUP (ORDER BY ProductID) OVER (PARTITION BY SalesOrderID) AS PercentileDisc FROM Sales.SalesOrderDetail WHERE SalesOrderID IN (43670, 43669, 43667, 43663) ORDER BY SalesOrderID DESC GO The above query will give us the following result: You can see that I have used PERCENTILE_DISC(0.5) in query, which is similar to finding median but not exactly. PERCENTILE_DISC() function takes a percentile as a passing parameters. It returns the value as answer which value is equal or great to the percentile value which is passed into the example. For example in above example we are passing 0.5 into the PERCENTILE_DISC() function. It will go through the resultset and identify which rows has values which are equal to or great than 0.5. In first example it found two rows which are equal to 0.5 and the value of ProductID of that row is the answer of PERCENTILE_DISC(). In some third windowed resultset there is only single row with the CUME_DIST() value as 1 and that is for sure higher than 0.5 making it as a answer. To make sure that we are clear with this example properly. Here is one more example where I am passing 0.6 as a percentile. Now let’s have fun following query: USE AdventureWorks GO SELECT SalesOrderID, OrderQty, ProductID, CUME_DIST() OVER(PARTITION BY SalesOrderID ORDER BY ProductID ) AS CDist, PERCENTILE_DISC(0.6) WITHIN GROUP (ORDER BY ProductID) OVER (PARTITION BY SalesOrderID) AS PercentileDisc FROM Sales.SalesOrderDetail WHERE SalesOrderID IN (43670, 43669, 43667, 43663) ORDER BY SalesOrderID DESC GO The above query will give us the following result: The result of the PERCENTILE_DISC(0.6) is ProductID of which CUME_DIST() is more than 0.6. This means for SalesOrderID 43670 has row with CUME_DIST() 0.75 is the qualified row, resulting answer 773 for ProductID. I hope this explanation makes it further clear. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Function, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • SQL SERVER – Sharing your ETL Resources Across Applications with Ease

    - by pinaldave
    Frequently an organization will find that the same resources are used in multiple ETL applications, for example, the same database, general purpose processing logic, or file system locations.  Creating an easy way to reuse these resources across multiple applications would increase efficiency and reduce errors.  Moreover, not every ETL developer has the same skill set, and it is likely that one developer will be more adept at writing code while another is more comfortable configuring database connections.  Real productivity gains will come when these developers are able to work independently while still making their work available to others assigned to the same project.  These are the benefits of a centralized version control system. Of course, most version control systems could be used to store and serve files, but the real need is to store and serve entire ETL applications so that each developer’s ongoing work can immediately benefit from another developer’s completed work.  In other words, the version control system needs to be tightly integrated with the tools used to develop the ETL application. The following screen shot shows such a tool. Desktop ETL tool that tightly integrates with a central version control system Developers can checkout or commit entire projects or just a single artifact.  Each artifact may be managed independently so if you need to go back to an earlier version of one artifact, changes you may have made to other artifacts are not lost.  By being tightly integrated into the graphical environment used to create and edit the project artifacts, it is extremely easy and straight-forward to move your files to and from the version control system and there is no dependency on another vendor’s version control system.  The built in version control system is optimized for managing the artifacts of ETL applications. It is equally important that the version control system supports all of the actions one typically performs such as rollbacks, locking and unlocking of files, and the ability to resolve conflicts.  Note that this particular ETL tool also has the capability to switch back and forth between multiple version control systems. It also needs to be easy to determine the status of an artifact.  Not just that it has been committed or modified, but when and by whom.  Generally you must query the version control system for this information, but having it displayed within the development environment is more desirable. Who’s ETL tool works in this fashion?  Last month I mentioned the data integration solution offered by expressor software.  The version control features I described in this post are all available in their just released expressor 3.1 Standard Edition through the integration of their expressor Studio development environment with a centralized metadata repository and version control system. You can download their Studio application, which is free, or evaluate the full Standard Edition on your own hardware.  It may be worth your time. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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