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  • What's required for a nameserver to be registered?

    - by Lin
    I'm trying to change nameservers for some of my domains at GoDaddy, but I occasionally run into "Nameserver not registered" problems, and then I'm not allowed to set the nameservers. Here are the cases I've tried, and I still don't understand what it takes to have a registered nameserver. With ns1 and ns2 pointing to my nameservers, I can set the nameservers successfully when I set up domains as follows: Host Summary entries for ns1 and ns2 at GoDaddy .co.cc domains with A records for ONLY ns1 and ns2 Hosted with other nameservers. Have only A records for ns1 and ns2 But these do NOT work (nameserver not registered error): .info domains at GoDaddy with A records for ONLY ns1 and ns2 Hosts with dyndns.org that point to IP of nameservers Also, when I dig any domains hosted at my nameservers using any of the above, I get the correct response. So what's the deal here? Why do the last two cases get "nameserver not registered errors"? Thanks!

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  • Getting a list of patches in an HPSA patch policy

    - by asm
    I'm trying to get a list of patches contained in a Patch Policy in HPSA -- I can get what I need via the Twister web interface (under PatchPolicy.getPatches(), give it an ID, and it happily returns a list of patches contained.) -- I'm having a hard time getting this to work via the Pytwist interface, though... I haven't used the Pytwist interface for much besides some very basic Device manipulation, and Python is.. not my forte. I create the TwistServer object, then a PatchPolicy object from that (which I think is working..), but can't figure out how/where to call the getPatches() method from in Python-land. If there's a way to dig this out of the database itself, that would work, too, but I can't seem to find much in there along these lines besides the vendor-recommended patching stuff, and we use custom policies.

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  • links for 2010-12-20

    - by Bob Rhubart
    Oracle BI Applications - Security "I recently had to dig into the standard Oracle BI Applications Security Oracle delivers out of the box. The clients had two security requirements..." - Daan Bakboord (tags: oracle security businessintelligence) Changing DataSource Details Using WLST (Multiple Domains) Jay Sensharma shares a script that will make it "easy for WebLogic Administrator to change all the DataSource UserName and Passwords." (tags: weblogic oracle wlst) Richard Veryard on Architecture: Complexity and Power 2 "Power and complexity are higher-order examples of so-called non-functional requirements. Architects need to be able to reason about the composition and decomposition of non-functional requirements." - Richard Veryard (tags: entarch complexity enterprisearchitecture) Anti-Search patterns - SQL to look for what is NOT there - Part One Oracle ACE Director Lucas Jellema discusses a number of situations in which "you are looking for records that do not exist" and demonstrates several "anti-queries." (tags: oracle otn oracleace sql) SOA & Middleware: Canceling a running composite in SOA Suite 11g Niall Commiskey offers a simple scenario. (tags: oracle soa) SOA Design Patterns in the Cloud | SOA World Magazine Srinivasan Sundara Raja attempts to clear up the "confusion in the air about the applicability of SOA in a Cloud managed environment and whether Cloud is the next generation of SOA." (tags: oracle soa cloud) Mark Nelson: Using WebLogic as a Load Balancer "There are a number of good options available to set up a software load balancer in the test environment," says Mark Nelson. "In this post, we will explore one such option – using the HTTP Cluster Servlet that is included with WebLogic Server." (tags: weblogic oracle otn)

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  • Fixing NativeHR 0×80070002 Error When Retracting or Deploying SharePoint Apps from Visual Studio

    - by Damon Armstrong
    Sometimes when App deployment fails from Visual Studio you will get the following error when trying to retract or redeploy the app: <nativehr>0×80070002</nativehr><nativestack></nativestack> There seems to be some issue with the information in the content database.  To fix the problem I just deleted all of the information from the App tables in the content database.  We only have one app in testing at a time so this worked fine for me.  Doing this in a production environment or if you have multiple apps installed is not recommended, so if you are in either of those scenarios you will probably have to dig into those tables to find the offending entries.  You may also have to remove some of the App principal entries from the App Service Application database as well (I’ll try to update this post if we find that to be true).   I’m going to post the SQL to do the full deletion, but be careful when running this: DO NOT RUN THIS IN A PRODUCTION ENVIRONMENT: DELETE FROM [dbo].[AppDatabaseMetadata] DELETE FROM [dbo].[AppInstallationProperty] DELETE FROM [dbo].[AppInstallations] DELETE FROM [dbo].[AppJobs] DELETE FROM [dbo].[AppLifecycleErrors] DELETE FROM [dbo].[AppPackages] DELETE FROM [dbo].[AppPrincipalPerms] DELETE FROM [dbo].[AppPrincipals] DELETE FROM [dbo].[AppResources] DELETE FROM [dbo].[AppRuntimeIcons] DELETE FROM [dbo].[AppRuntimeMetadata] DELETE FROM [dbo].[AppRuntimeSubstitutionDictionary] DELETE FROM [dbo].[AppSourceInfo] DELETE FROM [dbo].[AppSubscriptionCosts] DELETE FROM [dbo].[AppTaskDependencies]

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  • Pivotal Announces JSR-352 Compliance for Spring Batch

    - by reza_rahman
    Pivotal, the company currently funding development of the popular Spring Framework, recently announced JSR 352 (aka Batch Applications for the Java Platform) compliance for the Spring Batch project. More specifically, Spring Batch targets JSR-352 Java SE runtime compatibility rather than Java EE runtime compatibility. If you are surprised that APIs included in Java EE can pass TCKs targeted for Java SE, you should not be. Many other Java EE APIs target compatibility in Java SE environments such as JMS and JPA. You can read about Spring Batch's support for JSR-352 here as well as the Spring configuration to get JSR-352 working in Spring (typically a very low level implementation concern intended to be completely transparent to most JSR-352 users). JSR 352 is one of the few very encouraging cases of major active contribution to the Java EE standard from the Spring development team (the other major effort being Rod Johnson's co-leadership of JSR 330 along with Bob Lee). While IBM's Christopher Vignola led the spec and contributed IBM's years of highly mission critical batch processing experience from products like WebSphere Compute Grid and z/OS batch, the Spring team provided major influences to the API in particular for the chunk processing, listeners, splits and operational interfaces. The GlassFish team's own Mahesh Kannan also contributed, in particular by implementing much of the Java EE integration work for the reference implementation. This was an excellent example of multilateral engineering collaboration through the standards process. For many complex reasons it is not too hard to find evidence of less than amicable interaction between the Spring ecosystem and the Java EE standard over the years if one cares to dig deep enough. In reality most developers see Spring and Java EE as two sides of the same server-side Java coin. At the core Spring and Java EE ecosystems have always shared deep undercurrents of common user bases, bi-directional flows of ideas and perhaps genuine if not begrudging mutual respect. We can all hope for continued strength for both ecosystems and graceful high notes of collaboration via efforts like JSR 352.

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  • Where's my MD.070?

    - by Dave Burke
    In a previous Blog entry titled “Where’s My MD.050” I discussed how the OUM Analysis Specification is the “new-and-improved” version of the more traditional Functional Design Document (or MD.050 for Oracle AIM stalwarts). In a similar way, the OUM Design Specification is an evolution of what we used to call the Technical Design Document (or MD.070). Let’s dig a little deeper…… In a traditional software development process, the “Design Task” would include all the time and resources required to design the software component(s), AND to create the final Technical Design Document. However, in OUM, we have created distinct Tasks for pure design work, along with an optional Task for pulling all of that work together into a Design Specification. Some of the Design Tasks shown above will result in their own Work Products (i.e. an Architecture Description), whilst other Tasks would act as “placeholders” for a specific work effort. In any event, the DS.140 Design Specification can include a combination of unique content, along with links to other Work Products, together which enable a complete technical description of the component, or solution, being designed. So next time someone asks “where’s my MD.070” the short answer would be to tell them to read the OUM Task description for DS.140 – Design Specification!

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  • Command to execute another command while replaying the command on STDOUT

    - by hakre
    It's not easy to formulate the question properly, maybe it helps when I describe what I'd like to do. I want to execute a command and pipe it's output into a tool called pastebinit which uploads the STDOUT output to pastebin. That works very well, however I would like to send the command itself on top of it but w/o typing it a second time. Is there some command I can launch "my command" with that will Print "my command" on STDOUT Executes "my command" I have the feeling that something like that exists but as hard as it is to formulate such a question properly, I was not able to dig it up with google so far.

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  • Silverlight Cream for November 24, 2011 -- #1173

    - by Dave Campbell
    In this Thanksgiving Day Issue: Andrea Boschin, Samidip Basu, Ollie Riches, WindowsPhoneGeek, Sumit Dutta, Dhananjay Kumar, Daniel Egan, Doug Mair, Chris Woodruff, and Debal Saha.Happy Thanksgiving Everybody! Above the Fold: Silverlight: "Silverlight CommandBinding with Simple MVVM Toolkit" Debal Saha WP7: "How many pins can Bing Maps handle in a WP7 app - part 3" Ollie Riches Shoutouts: Michael Palermo's latest Desert Mountain Developers is up Michael Washington's latest Visual Studio #LightSwitch Daily is up From SilverlightCream.com:Windows Phone 7.5 - Play with musicAndrea Boschin's latest WP7 post is up on SilverlightShow... he's talking about the improvements in the music hub and also the programmability of musicOData caching in Windows PhoneSamidip Basu has an OData post up on SilverlightShow also, and he's talking about data caching strategies on WP7How many pins can Bing Maps handle in a WP7 app - part 3Ollie Riches has part 3 of his series on Bing Maps and pins... sepecifically how to deal with a large number of them... after going through discussing pins, he is suggesting using a heat map which looks pretty darn good, and renders fast... except when on a device :(Improvements in the LongListSelector Selection with Nov `11 release of WP ToolkitWindowsPhoneGeek's latest is this tutorial on the LongListSelector in the WP Toolkit... check out the previous info in his free eBook to get ready then dig into this tutorial for improvements in the control.Part 25 - Windows Phone 7 - Device StatusSumit Dutta's latest post is number 25 in his WP7 series, and time out he's digging into device status in the Microsoft.Phone.Info namespaceVideo on How to work with Picture in Windows Phone 7Dhananjay Kumar's latest video tutorial on WP7 is up, and he's talking about working with Photos.Live Tiles–Windows Phone WorkshopDaniel Egan has the video up of a Windows Phone Workshop done earlier this week on Live Tiles31 Days of Mango | Day #15: The Progress BarDoug Mair shares the show with Jeff Blankenburg in Jeff's Day 15 in his 31 Day quest of Mango, talking about the progressbar: Indeterminate and Determinate Modes abound31 Days of Mango | Day #14: Using ODataChris Woodruff has a guest spot on Jeff Blankenburg's 31 Days series with this post on OData... long detailed tutorial with all the codeSilverlight CommandBinding with Simple MVVM ToolkitDebal Saha has a nice detailed tutorial up on CommandBinding.. he's using the SimpleMVVM Toolkit and shows downloading and installing itStay in the 'Light!Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCreamJoin me @ SilverlightCream | Phoenix Silverlight User GroupTechnorati Tags:Silverlight    Silverlight 3    Silverlight 4    Windows PhoneMIX10

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  • NetBeans Podcast #61

    - by TinuA
    Download mp3: 39 minutes – 31.6 MB Subscribe to the NetBeans Podcast on iTunes NetBeans Community News with Geertjan and Tinu What's NEW? The Smarter and NOW FASTER NetBeans IDE 7.2 available since July. Is it faster for you too? Tell us about it on Twitter! (#netbeans) NetBeans Community Day at JavaOne is BACK!!! Join the NetBeans team in San Francisco on Sunday, September 30th for a full day of sessions about how various Java EE, JavaFX, and NetBeans Platform experts are using NetBeans in the real-world. NetBeans Community Day is just the start of the fun at JavaOne 2012, check out the full listing of ALL NetBeans-related sessions at the conference. NetBeans Governance Board elections are around the corner. Nominate yourself or someone who you think can represent the interest of the NetBeans Community. Email us at nbpodcast at netbeans dot org to get on the ballot in September. Community Interview: Çagatay Çivici, PrimeFaces Çagatay Çivici is the lead architect and founder of PrimeFaces , the popular JSF component library. Find out what the project is about, its inception, how to create PrimeFaces-based application inside NetBeans IDE, and more. Learn more about PrimeFaces at NetBeans Community Day at JavaOne 2012. Dig deeper into PrimeFaces at JavaOne 2012: CON6139 - Lessons Learned in Building Enterprise and Desktop Applications with the NetBeans IDE Community Interview: Timon Veenstra, Agrosense Timon Veenstra is the architect behind Agrosense , an open-source farm management system built on the NetBeans Platform. Find out how Agrosense helps farms run more efficiently and productively, and why NetBeans is the platform of choice for Timon and the Agrosense team. Catch a demo of Agrosense at NetBeans Community Day at JavaOne 2012. API Design with Jarda Tulach Geertjan has been using the Lookup API incorrectly; Jarda sets him on the right path. *Have ideas for NetBeans Podcast topics? Send them to nbpodcast at netbeans dot org. *Subscribe to the official NetBeans page on Facebook! Check us out as well on Twitter, YouTube, and Google+.

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  • Autoscaling in a modern world&hellip;. Part 1

    - by Steve Loethen
    It has been a while since I have had time to sit down and blog.  I need to make sure I take the time.  It helps me to focus on technology and not let the administrivia keep me from doing the things I love. I have been focusing on the cloud for the last couple of years.  Specifically the  PaaS platform from Microsoft called Azure.  Time to dig in.. I wanted to explore Autoscaling.  Autoscaling is not native part of Azure.  The platform has the needed connection points.  You can write code that looks at the health and performance of your application components and react to needed scaling changes.  But that means you have to write all the code.  Luckily, an add on to the Enterprise Library provides a lot of code that gets you a long way to being able to autoscale without having to start from scratch. The tool set is primarily composed of a Autoscaler object that you need to host.  This object, when hosted and configured, looks at the performance criteria you specify and adjusts your application based on your needs.  Sounds perfect. I started with the a set of HOL’s that gave me a good basis to understand the mechanics.  I worked through labs 1 and 2 just to get the feel, but let’s start our saga at the end of lab3.  Lab3 end results in a web application, hosted in Azure and a console app running on premise.  The web app has a few buttons on it.  One set adds messages to a queue, another removes them.  A second set of buttons drives processor utilization to 100%.  If you want to guess, a safe bet is that the Autoscaler is configured to react to a queue that has filled up or high cpu usage.  We will continue our saga in the next post…

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  • Revamped Google Webmaster Tools

    With a positive surprise I realized today that Google's Webmaster Tools had some minor overhauling and provide some more details than before. Most obvious are the changes on the dashboard where the Top Search Queries now provide information about impressions and clicktroughs instead of the rankings before. Only the links of the search expressions are missing. It seems that the Top search queries were in the focus of this update. The section is now spiced with detailed graphs about what happened during selectable periods on your site. Well, seems that the Webmaster Tools mimic a stripped-down version of Google Analytics... I was very pleased by the details that are offered when you click on a single query term. Really nice to see the search rankings and your responsible URLs at the same time. Before, you had to put two browser instances side-by-side to achieve this kind of overview. Personally, I like the approach to visualize statistics the way Google or other providers do. It gives you a quick and informative overview, and enables you to dig further into details about peaks and lows on your visits, page impressions or clickthroughs.

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  • Going Paperless

    - by Jesse
    One year ago I came to work for a company where the entire development team is 100% “remote”; we’re spread over 3 time zones and each of us works from home. This seems to be an increasingly popular way for people to work and there are many articles and blog posts out there enumerating the advantages and disadvantages of working this way. I had read a lot about telecommuting before accepting this job and felt as if I had a pretty decent idea of what I was getting into, but I’ve encountered a few things over the past year that I did not expect. Among the most surprising by-products of working from home for me has been a dramatic reduction in the amount of paper that I use on a weekly basis. Hoarding In The Workplace Prior to my current telecommute job I worked in what most would consider pretty traditional office environments. I sat in cubicles furnished with an enormous plastic(ish) modular desks, had a mediocre (at best) PC workstation, and had ready access to a seemingly endless supply of legal pads, pens, staplers and paper clips. The ready access to paper, countless conference room meetings, and abundance of available surface area on my desk and in drawers created a perfect storm for wasting paper. I brought a pad of paper with me to every meeting I ever attended, scrawled some brief notes, and then tore that sheet off to keep next to my keyboard to follow up on any needed action items. Once my immediate need for the notes was fulfilled, that sheet would get shuffled off into a corner of my desk or filed away in a drawer “just in case”. I would guess that for all of the notes that I ever filed away, I might have actually had to dig up and refer to 2% of them (and that’s probably being very generous). That said, on those rare occasions that I did have to dig something up from old notes, it was usually pretty important and I ended up being very glad that I saved them. It was only when I would leave a job or move desks that I would finally gather all those notes together and take them to shredding bin to be disposed of. When I left my last job the amount of paper I had accumulated over my three years there was absurd, and I knew coworkers who had substance-abuse caliber paper wasting addictions that made my bad habit look like nail-biting in comparison. A Product Of My Environment I always hated using all of this paper, but simply couldn’t bring myself to stop. It would look bad if I showed up to an important conference room meeting without a pad of paper. What if someone said something profound! Plus, everyone else always brought paper with them. If you saw someone walking down the hallway with a pad of paper in hand you knew they must be on their way to a conference room meeting. Some people even had fancy looking portfolio notebook sheaths that gave their legal pads all the prestige of a briefcase. No one ever worried about running out of fresh paper because there was an endless supply, and there certainly was no shortage of places to store and file used paper. In short, the traditional office was setup for using tons and tons of paper; it’s baked into the culture there. For that reason, it didn’t take long for me to kick the paper habit once I started working from home. In my home office, desk and drawer space are at a premium. I don’t have the budget (or the tolerance) for huge modular office furniture in my spare bedroom. I also no longer have access to a bottomless pit of office supplies stock piled in cabinets and closets. If I want to use some paper, I have to go out and buy it. Finally (and most importantly), all of the meetings that I have to attend these days are “virtual”. We use instant messaging, VOIP, video conferencing, and e-mail to communicate with each other. All I need to take notes during a meeting is my computer, which I happen to be sitting right in front of all day. I don’t have any hard numbers for this, but my gut feeling is that I actually take a lot more notes now than I ever did when I worked in an office. The big difference is I don’t have to use any paper to do so. This makes it far easier to keep important information safe and organized. The Right Tool For The Job When I first started working from home I tried to find a single application that would fill the gap left by the pen and paper that I always had at my desk when I worked in an office. Well, there are no silver bullets and I’ve evolved my approach over time to try and find the best tool for the job at hand. Here’s a quick summary of how I take notes and keep everything organized. Notepad++ – This is the first application I turn to when I feel like there’s some bit of information that I need to write down and save. I use Launchy, so opening Notepad++ and creating a new file only takes a few keystrokes. If I find that the information I’m trying to get down requires a more sophisticated application I escalate as needed. The Desktop – By default, I save every file or other bit of information to the desktop. Anyone who has ever had to fix their parents computer before knows that this is a dangerous game (any file my mother has ever worked on is saved directly to the desktop and rarely moves anywhere else). I agree that storing things on the desktop isn’t a great long term approach to keeping organized, which is why I treat my desktop a bit like my e-mail inbox. I strive to keep both empty (or as close to empty as I possibly can). If something is on my desktop, it means that it’s something relevant to a task or project that I’m currently working on. About once a week I take things that I’m not longer working on and put them into my ‘Notes’ folder. The ‘Notes’ Folder – As I work on a task, I tend to accumulate multiple files associated with that task. For example, I might have a bit of SQL that I’m working on to gather data for a new report, a quick C# method that I came up with but am not yet ready to commit to source control, a bulleted list of to-do items in a .txt file, etc. If the desktop starts to get too cluttered, I create a new sub-folder in my ‘Notes’ folder. Each sub-folder’s name is the current date followed by a brief description of the task or project. Then all files related to that task or project go into that sub folder. By using the date as the first part of the folder name, these folders are automatically sorted in reverse chronological order. This means that things I worked on recently will generally be near the top of the list. Using the built-in Windows search functionality I now have a pretty quick and easy way to try and find something that I worked on a week ago or six months ago. Dropbox – Dropbox is a free service that lets you store up to 2GB of files “in the cloud” and have those files synced to all of the different computers that you use. My ‘Notes’ folder lives in Dropbox, meaning that it’s contents are constantly backed up and are always available to me regardless of which computer I’m using. They also have a pretty decent iPhone application that lets you browse and view all of the files that you have stored there. The free 2GB edition is probably enough for just storing notes, but I also pay $99/year for the 50GB storage upgrade and keep all of my music, e-books, pictures, and documents in Dropbox. It’s a fantastic service and I highly recommend it. Evernote – I use Evernote mostly to organize information that I access on a fairly regular basis. For example, my Evernote account has a running grocery shopping list, recipes that my wife and I use a lot, and contact information for people I contact infrequently enough that I don’t want to keep them in my phone. I know some people that keep nearly everything in Evernote, but there’s something about it that I find a bit clunky, so I tend to use it sparingly. Google Tasks – One of my biggest paper wasting habits was keeping a running task-list next to my computer at work. Every morning I would sit down, look at my task list, cross off what was done and add new tasks that I thought of during my morning commute. This usually resulted in having to re-copy the task list onto a fresh sheet of paper when I was done. I still keep a running task list at my desk, but I’ve started using Google Tasks instead. This is a dead-simple web-based application for quickly adding, deleting, and organizing tasks in a simple checklist style. You can quickly move tasks up and down on the list (which I use for prioritizing), and even create sub-tasks for breaking down larger tasks into smaller pieces. Balsamiq Mockups – This is a simple and lightweight tool for creating drawings of user interfaces. It’s great for sketching out a new feature, brainstorm the layout of a interface, or even draw up a quick sequence diagram. I’m terrible at drawing, so Balsamiq Mockups not only lets me create sketches that other people can actually understand, but it’s also handy because you can upload a sketch to a common location for other team members to access. I can honestly say that using these tools (and having limited resources at home) have lead me to cut my paper usage down to virtually none. If I ever were to return to a traditional office workplace (hopefully never!) I’d try to employ as many of these applications and techniques as I could to keep paper usage low. I feel far less cluttered and far better organized now.

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  • Windows 7 Connection Sharing unable to access some sites

    - by Kristopher Ives
    I have a pretty sad networking situation that involves connecting to an open Wireless network and sharing that connection to an Ethernet that is plugged into a Linksys router. This has been done with XP and Windows 7, and it works great with XP. The problem with Windows 7 is that only some DNS will work. I don't know if it's been poisoned on the network above us (which we have no control over), but we've tried clearing the DNS cache as well as moving to using Google's DNS servers (8.8.8.8, 8.8.4.4). Here is a really quick list of sites that won't respond to DNS requests at all via dig, although if I get the IP address I can ping them: facebook.com yuilibrary.com twitter.com A lot of sites do work though. Anyone have an idea? It may be a subnet problem? If anyone wants more info let me know.

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  • Read All The Books from Skyrim on Your Ebook Reader

    - by Jason Fitzpatrick
    If you’re a fan of the wildly popular RPG game Skyrim, you’ve undoubtedly discovered the books sprinkled throughout the Empire. This collection brings them all together for out-of-game reading. Blogger and Skyrim fan Capaneus enjoyed reading the in-game books so much (found on the shelves of homes and otherwise scattered throughout the virtual world) that he did a little digging in the game files to turn up the source of the books. It turns out he didn’t have to dig too deeply, the files are stored as text documents (and if you have a copy of the game installed right now you could easily open them up yourself). He took those text files and carefully formatted them as MOBI and EPUB files, well suited for use on an ebook reader or tablet. Hit up the link below to grab a copy for your own perusal. While we can’t see this lasting long in the age of copyright enforcement and litigation we’d like to think the company behind Skyrim will see the utility of sharing the books (existing Skyrim owners will enjoy it and the curious will likely be inspired to buy the game). Dovahkiin Gutenberg [Capane.us via The Unofficial Apple Weblog] How to Use Offline Files in Windows to Cache Your Networked Files Offline How to See What Web Sites Your Computer is Secretly Connecting To HTG Explains: When Do You Need to Update Your Drivers?

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  • GRE subject Computer science

    - by Maddy.Shik
    How do I prepare for the GRE Computer Science subject test? Are there any standard text books I should follow? Agree that its under graduation level and one doesn't need to dig to deep for it. I have done my computer engineering from a college who ranks in top 20 in India. So may be my curriculum has not been that good as compared to international students. Since now i want to get admission in to world renowned university's Ph. D. program. I want to enhance my basic skills up to a level to beat other international students in competition. I want to know good book references which are recommended by professors in international school like CMU, MIT, Standford etc. Like for Algorithms Coreman is considered very good. Good books builds concepts from very basic so that one doesn't need to mug up even a basic concepts. Coreman is just too good with good blend of Mathematics and programming concepts. Definitely Test paper are must but that can be practiced once one has read text books thoroughly. Besides its been 2 years i passed out from college so its is essential for me to revise all concepts from text books. Please tell me standard text books for each subject like Computer Architecture, Database Design, Operating Systems, Discrete Maths etc.

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  • wynapse.com down last night, SC tonight

    - by Dave Campbell
    In an industry segment that nobody is ever 'asleep', I suppose no time is a good time to take SQL Server down for upgrades, and I had forgotten that my host was going to be doing that. Last night about 9pm (Arizona), in the middle of working on a blog post, things started going wonky and I finally realized everything was ok except for SQL Server. I turned in a ticket on it and was reminded about the maintenance schedule... guess I file those away in memory and just assume they'll happen while I'm asleep :) So, looking at the schedule, it appears that SQL Server for SilverlightCream is going to be down tonight. Minimum is 9-12pm Arizona time... mileage and time may vary. Since all the posts are run through SC to get the Skim count, having SQL down sucks, but I'd rather we got maintenance than have to react to a crash because of something that wasn't maintained. I'll try to get the next 'Cream post out early so that the bulk of folks can dig through it prior to the outage. Meanwhile, for those of you in Phoenix, tonight is our Phoenix Silverlight User Group April meeting, and Joel Neubeck is going to be giving us the run-through on Windows Phone 7! We're not as advanced as those MVP rock-stars in California like Victor Gaudioso who streams his user group meeting, so you'll just have to show up for the goodness! And for anyone that's interested, here's some WP7 bling for your desktop... I want some of this real bad for my laptop! Get the full image in the post by Ozymandias:

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  • Creating a Network link between 2 buildings

    - by Adam
    Hey My company needs to create a network link between two buildings. Currently we have a cat5e network in one building and would like to connect some computers(about 15) in our second building to the main network in the first building. The distance between the two buildings is 30 metres. The 30 metres means going through a wall from the first building. Going through the car park and then through a wall into the other building. We can run any cables through speed ramps and so we do not need to dig up the road! Also the second building does not have an Internet connection and so we have to create some sort of cable link so that they can share our Internet connection. Ideas? Should we just run cat5e? Should we run fibre? Should we run coaxial?

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  • SQL Azure Security: DoS

    - by Herve Roggero
    Since I decided to understand in more depth how SQL Azure works I started to dig into its performance characteristics. So I decided to write an application that allows me to put SQL Azure to the test and compare results with a local SQL Server database. One of the options I added is the ability to issue the same command on multiple threads to get certain performance metrics. That's when I stumbled on an interesting security feature of SQL Azure: its Denial of Service (DoS) detection engine. What this security feature does is that it performs a check on the number of connections being established, and if the rate of connection is too high, SQL Azure blocks all communication from that machine. I am still trying to learn more about this specific feature, but it appears that going to the SQL Azure portal and testing the connection from the portal "resets" the feature and you are allowed to connect again... until you reach the login threashold. In the specific test I was performing, all the logins were successful. I haven't tried to login with an invalid account or password... that will be for next time. On my Linked In group (SQL Server and SQL Azure Security: http://www.linkedin.com/groups?gid=2569994&trk=hb_side_g) Chip Andrews (www.sqlsecurity.com) pointed out that this feature in itself could present an internal threat. In theory, a rogue application could be issuing many login requests from a NATed network, which could potentially prevent any production system from connecting to SQL Azure within the same network. My initial response was that this could indeed be the case. However, while the TCP protocol contains the latest NATed IP address of a machine (which masks the origin of the machine making the SQL request), the TDS protocol itself contains the IP Address of the machine making the initial request; so technically there would be a way for SQL Azure to block only the internal IP address making the rogue requests.  So this warrants further investigation... stay tuned...

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  • Changing Network Path of Offline Files

    - by Adam
    Many of our users have their Home folder set as Available Offline. Their Windows 7 laptops will not be back on our network for a few weeks. In the mean time, we're setting up new servers and reorganizing our files, so the network path to the Home folder is going to be completely different. Based on some testing I did, when the users return, any files they've created or modified while offline will be gone, and the new Home folder will be there and not set to sync. The offline cache of the old Home folder is still accessible through the Sync Center, but they're not going to want to dig through that and try to find what's missing. Avoiding this would involve keeping the old server around and moving everyone to the new location in person, so we know for sure they're synced first. Is there any way to avoid this that isn't as tedious, like a quick registry edit or something that will point the old offline cache to the new location?

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  • How can a non-technical person learn to write a spec for small projects?

    - by Joseph Turian
    How can a non-technical person learn to write specs for small projects? A friend of mine is trying to outsource some development on a statistics project. In particular, he does a lot of work in excel, and wants to outsource the creation of scripts to do what he now does by hand. However, my friend is extremely non-technical. He is poor at writing technical specs. When he does write a spec, it is written the way you would describe doing something in excel (go to this cell and then copy the value to that cell). It is also overly verbose, and does examples several times. I'm not sure if he properly describes corner cases. The first project he outsourced was a failure. I think he overdescribed some details, but underdescribed corner cases. That and/or the coder he hired didn't think through the corner cases and ask appropriate questions. I'm not sure. I got on IM with him and it took me half an hour to dig out a description that should have taken five minutes or less to describe. I wrote the scripts for him at the end, but didn't examine why his process with the coder failed. He has asked me for help. However, I refuse to get involved, because taking his spec and translating it into clear requirements is 10x more work than executing on a clearly written spec. What is the right way for him to learn? Are there resources he could use? Are there ways he can learn from small, low-pressure practice projects with coders? Most of his scripts are statistical and data processing oriented. e.g. take this column and run an average over it. Remove these rows under these conditions. So the challenge is different than spec'ing a web app.

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  • How to Be a Software Engineer?

    - by Mistrio
    My problem is kind of weird so please bear with me. I have been working in a start up concerned basically with mobile development since my graduation 2 years ago. I develop apps for iOS but it's not really relevant. The start up structure is simply founders developers, with no middle-tier technical supervision or project management whatsoever. A typical project cycle of ours is like this: meet with a client send very vague recruitment to an outsourced graphics designer dig in development right after we get the design, no questions asked then improvise improvise improvise! It's not that we are unaware that stuff like requirements analysis, UML, design patterns, source code control, testing, development methodologies... etc. exist, we just simply don't use them, and I mean like never. The result is usually a clunk of hardly-maintainable yet working code. Despite everything we are literally flourishing with many successful apps on all platforms and bigger clients each project. The thing is, we want the chaos and we're looking for advice. How would you fix our company technically? Given that you can't hire project managers or team leaders just because we are barely 5 developers, so it wouldn't be a justified cost for the founders, but one-time things like courses, books, private training... etc is an option. Lastly, if it's relevant, we are based in Egypt. Thank you a lot in advance.

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  • How can a non-technical person can learn to write a spec for small projects?

    - by Joseph Turian
    How can a non-technical person learn to write specs for small projects? A friend of mine is trying to outsource some development on a statistics project. In particular, he does a lot of work in excel, and wants to outsource the creation of scripts to do what he now does by hand. However, my friend is extremely non-technical. He is poor at writing technical specs. When he does write a spec, it is written the way you would describe doing something in excel (go to this cell and then copy the value to that cell). It is also overly verbose, and does examples several times. I'm not sure if he properly describes corner cases. The first project he outsourced was a failure. I think he overdescribed some details, but underdescribed corner cases. That and/or the coder he hired didn't think through the corner cases and ask appropriate questions. I'm not sure. I got on IM with him and it took me half an hour to dig out a description that should have taken five minutes or less to describe. I wrote the scripts for him at the end, but didn't examine why his process with the coder failed. He has asked me for help. However, I refuse to get involved, because taking his spec and translating it into clear requirements is 10x more work than executing on a clearly written spec. What is the right way for him to learn? Are there resources he could use? Are there ways he can learn from small, low-pressure practice projects with coders? [edit: Most of his scripts are statistical and data processing oriented. e.g. take this column and run an average over it. Remove these rows under these conditions. So the challenge is different than spec'ing a web app.]

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  • I want to build a Virtual Machine, are there any good references?

    - by Michael Stum
    I'm looking to build a Virtual Machine as a platform independent way to run some game code (essentially scripting). The Virtual Machines that I'm aware of in games are rather old: Infocom's Z-Machine, LucasArts' SCUMM, id Software's Quake 3. As a .net Developer, I'm familiar with the CLR and looked into the CIL Instructions to get an overview of what you actually implement on a VM Level (vs. the language level). I've also dabbled a bit in 6502 Assembler during the last year. The thing is, now that I want¹ to implement one, I need to dig a bit deeper. I know that there are stack based and register based VMs, but I don't really know which one is better at what and if there are more or hybrid approaches. I need to deal with memory management, decide which low level types are part of the VM and need to understand why stuff like ldstr works the way it does. My only reference book (apart from the Z-Machine stuff) is the CLI Annotated Standard, but I wonder if there is a better, more general/fundamental lecture for VMs? Basically something like the Dragon Book, but for VMs? I'm aware of Donald Knuth's Art of Computer Programming which uses a register-based VM, but I'm not sure how applicable that series still is, especially since it's still unfinished? Clarification: The goal is to build a specialized VM. For example, Infocom's Z-Machine contains OpCodes for setting the Background Color or playing a sound. So I need to figure out how much goes into the VM as OpCodes vs. the compiler that takes a script (language TBD) and generates the bytecode from it, but for that I need to understand what I'm really doing. ¹ I know, modern technology would allow me to just interpret a high level scripting language on the fly. But where is the fun in that? :) It's also a bit hard to google because Virtual Machines is nowadays often associated with VMWare-type OS Virtualization...

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  • How can i control how much Authority RRs a DNS answer returns ?

    - by Benoît
    Hello, i quite don't understand Authority RRs. Using dig to resolve some random A records, my caching DNS server sometimes also return Authority RRs and sometimes not. The number and the type of the returned Authority RRs also vary a lot. What does control whether Authority RRs are returned or not on a standard client query ? Is it a client or server setting ? What does control how many Authoriy RRs are returned ? What does control of the type of the Authority RRs records returned ? Sometimes it's multiple NS, sometimes it's a SOA. It's also often comes with Additional RRs of type A about the Authority RRs NS returned. I'm really looking for a RFC or kind of describing this. Thanks.

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  • Analyzing Linux NFS server performance

    - by Kamil Kisiel
    I'd like to do some analysis of our NFS server to help track down potential bottlenecks in our applications. The server is running SUSE Enterprise Linux 10. The kind of things I'm looking to know are: Which files are being accessed by which clients Read/write throughput on a per-client basis Overhead imposed by other RPC calls Time spent waiting on other NFS requests, or disk I/O, to service a client I already know about the statistics available in /proc/net/rpc/nfsd and in fact I wrote a blog post describing them in depth. What I'm looking for is a way to dig deeper and help understand what factors are contributing to the performance seen by a particular client. I want to analyze the role the NFS server plays in the performance of an application on our cluster so that I can think of ways to best optimize it.

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