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  • Before and After the Programmer Life [closed]

    - by Gio Borje
    How were people before and after becoming programmers through a black box? In a black box, the implementation is irrelevant; therefore, we focus on the input and output: High School Nerd -> becomeProgrammer() -> Manager (Person Before) -> (Person as Programmer) -> (New Person) (Person Before) -> (Person as Programmer) How are the typical lives of people before they became programmers? Why do people pursue life as a programmer? (Person as Programmer) -> (New Person) How has becoming a programmer changed people afterwards? Why quit being a programmer? Anecdotes would be nice. If many programmers have similar backgrounds and fates, do you think that there is some sort of stereotypical person that are destined to become programmers?

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  • Exposing an MVC Application Through SharePoint

    - by Damon
    Below you will find my presentation slides and demo files for my SharePoint TechFest 2010 presentation on Exposing an MVC Application through SharePoint.  One of the points I forgot to mention goes back to the performance and licensing benefits of this approach.  If you have a SharePoint box that is completely slammed, you can put the MVC application on a separate web server and essentially offload the application processing to another server.  In terms of licensing, you can leave SharePoint off that new server and just access SharePoint data via web services from the box.  This makes it a lot cheaper if you have MOSS - but if you're just running WSS then it may not have as many cost benefits.  Remember, programming against the web services is not always the easiest thing, so you have to weight the cost/benefit ratio when making such a determination.

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  • Towards Database Continuous Delivery – What Next after Continuous Integration? A Checklist

    - by Ben Rees
    .dbd-banner p{ font-size:0.75em; padding:0 0 10px; margin:0 } .dbd-banner p span{ color:#675C6D; } .dbd-banner p:last-child{ padding:0; } @media ALL and (max-width:640px){ .dbd-banner{ background:#f0f0f0; padding:5px; color:#333; margin-top: 5px; } } -- Database delivery patterns & practices STAGE 4 AUTOMATED DEPLOYMENT If you’ve been fortunate enough to get to the stage where you’ve implemented some sort of continuous integration process for your database updates, then hopefully you’re seeing the benefits of that investment – constant feedback on changes your devs are making, advanced warning of data loss (prior to the production release on Saturday night!), a nice suite of automated tests to check business logic, so you know it’s going to work when it goes live, and so on. But what next? What can you do to improve your delivery process further, moving towards a full continuous delivery process for your database? In this article I describe some of the issues you might need to tackle on the next stage of this journey, and how to plan to overcome those obstacles before they appear. Our Database Delivery Learning Program consists of four stages, really three – source controlling a database, running continuous integration processes, then how to set up automated deployment (the middle stage is split in two – basic and advanced continuous integration, making four stages in total). If you’ve managed to work through the first three of these stages – source control, basic, then advanced CI, then you should have a solid change management process set up where, every time one of your team checks in a change to your database (whether schema or static reference data), this change gets fully tested automatically by your CI server. But this is only part of the story. Great, we know that our updates work, that the upgrade process works, that the upgrade isn’t going to wipe our 4Tb of production data with a single DROP TABLE. But – how do you get this (fully tested) release live? Continuous delivery means being always ready to release your software at any point in time. There’s a significant gap between your latest version being tested, and it being easily releasable. Just a quick note on terminology – there’s a nice piece here from Atlassian on the difference between continuous integration, continuous delivery and continuous deployment. This piece also gives a nice description of the benefits of continuous delivery. These benefits have been summed up by Jez Humble at Thoughtworks as: “Continuous delivery is a set of principles and practices to reduce the cost, time, and risk of delivering incremental changes to users” There’s another really useful piece here on Simple-Talk about the need for continuous delivery and how it applies to the database written by Phil Factor – specifically the extra needs and complexities of implementing a full CD solution for the database (compared to just implementing CD for, say, a web app). So, hopefully you’re convinced of moving on the the next stage! The next step after CI is to get some sort of automated deployment (or “release management”) process set up. But what should I do next? What do I need to plan and think about for getting my automated database deployment process set up? Can’t I just install one of the many release management tools available and hey presto, I’m ready! If only it were that simple. Below I list some of the areas that it’s worth spending a little time on, where a little planning and prep could go a long way. It’s also worth pointing out, that this should really be an evolving process. Depending on your starting point of course, it can be a long journey from your current setup to a full continuous delivery pipeline. If you’ve got a CI mechanism in place, you’re certainly a long way down that path. Nevertheless, we’d recommend evolving your process incrementally. Pages 157 and 129-141 of the book on Continuous Delivery (by Jez Humble and Dave Farley) have some great guidance on building up a pipeline incrementally: http://www.amazon.com/Continuous-Delivery-Deployment-Automation-Addison-Wesley/dp/0321601912 For now, in this post, we’ll look at the following areas for your checklist: You and Your Team Environments The Deployment Process Rollback and Recovery Development Practices You and Your Team It’s a cliché in the DevOps community that “It’s not all about processes and tools, really it’s all about a culture”. As stated in this DevOps report from Puppet Labs: “DevOps processes and tooling contribute to high performance, but these practices alone aren’t enough to achieve organizational success. The most common barriers to DevOps adoption are cultural: lack of manager or team buy-in, or the value of DevOps isn’t understood outside of a specific group”. Like most clichés, there’s truth in there – if you want to set up a database continuous delivery process, you need to get your boss, your department, your company (if relevant) onside. Why? Because it’s an investment with the benefits coming way down the line. But the benefits are huge – for HP, in the book A Practical Approach to Large-Scale Agile Development: How HP Transformed LaserJet FutureSmart Firmware, these are summarized as: -2008 to present: overall development costs reduced by 40% -Number of programs under development increased by 140% -Development costs per program down 78% -Firmware resources now driving innovation increased by a factor of 8 (from 5% working on new features to 40% But what does this mean? It means that, when moving to the next stage, to make that extra investment in automating your deployment process, it helps a lot if everyone is convinced that this is a good thing. That they understand the benefits of automated deployment and are willing to make the effort to transform to a new way of working. Incidentally, if you’re ever struggling to convince someone of the value I’d strongly recommend just buying them a copy of this book – a great read, and a very practical guide to how it can really work at a large org. I’ve spoken to many customers who have implemented database CI who describe their deployment process as “The point where automation breaks down. Up to that point, the CI process runs, untouched by human hand, but as soon as that’s finished we revert to manual.” This deployment process can involve, for example, a DBA manually comparing an environment (say, QA) to production, creating the upgrade scripts, reading through them, checking them against an Excel document emailed to him/her the night before, turning to page 29 in his/her notebook to double-check how replication is switched off and on for deployments, and so on and so on. Painful, error-prone and lengthy. But the point is, if this is something like your deployment process, telling your DBA “We’re changing everything you do and your toolset next week, to automate most of your role – that’s okay isn’t it?” isn’t likely to go down well. There’s some work here to bring him/her onside – to explain what you’re doing, why there will still be control of the deployment process and so on. Or of course, if you’re the DBA looking after this process, you have to do a similar job in reverse. You may have researched and worked out how you’d like to change your methodology to start automating your painful release process, but do the dev team know this? What if they have to start producing different artifacts for you? Will they be happy with this? Worth talking to them, to find out. As well as talking to your DBA/dev team, the other group to get involved before implementation is your manager. And possibly your manager’s manager too. As mentioned, unless there’s buy-in “from the top”, you’re going to hit problems when the implementation starts to get rocky (and what tool/process implementations don’t get rocky?!). You need to have support from someone senior in your organisation – someone you can turn to when you need help with a delayed implementation, lack of resources or lack of progress. Actions: Get your DBA involved (or whoever looks after live deployments) and discuss what you’re planning to do or, if you’re the DBA yourself, get the dev team up-to-speed with your plans, Get your boss involved too and make sure he/she is bought in to the investment. Environments Where are you going to deploy to? And really this question is – what environments do you want set up for your deployment pipeline? Assume everyone has “Production”, but do you have a QA environment? Dedicated development environments for each dev? Proper pre-production? I’ve seen every setup under the sun, and there is often a big difference between “What we want, to do continuous delivery properly” and “What we’re currently stuck with”. Some of these differences are: What we want What we’ve got Each developer with their own dedicated database environment A single shared “development” environment, used by everyone at once An Integration box used to test the integration of all check-ins via the CI process, along with a full suite of unit-tests running on that machine In fact if you have a CI process running, you’re likely to have some sort of integration server running (even if you don’t call it that!). Whether you have a full suite of unit tests running is a different question… Separate QA environment used explicitly for manual testing prior to release “We just test on the dev environments, or maybe pre-production” A proper pre-production (or “staging”) box that matches production as closely as possible Hopefully a pre-production box of some sort. But does it match production closely!? A production environment reproducible from source control A production box which has drifted significantly from anything in source control The big question is – how much time and effort are you going to invest in fixing these issues? In reality this just involves figuring out which new databases you’re going to create and where they’ll be hosted – VMs? Cloud-based? What about size/data issues – what data are you going to include on dev environments? Does it need to be masked to protect access to production data? And often the amount of work here really depends on whether you’re working on a new, greenfield project, or trying to update an existing, brownfield application. There’s a world if difference between starting from scratch with 4 or 5 clean environments (reproducible from source control of course!), and trying to re-purpose and tweak a set of existing databases, with all of their surrounding processes and quirks. But for a proper release management process, ideally you have: Dedicated development databases, An Integration server used for testing continuous integration and running unit tests. [NB: This is the point at which deployments are automatic, without human intervention. Each deployment after this point is a one-click (but human) action], QA – QA engineers use a one-click deployment process to automatically* deploy chosen releases to QA for testing, Pre-production. The environment you use to test the production release process, Production. * A note on the use of the word “automatic” – when carrying out automated deployments this does not mean that the deployment is happening without human intervention (i.e. that something is just deploying over and over again). It means that the process of carrying out the deployment is automatic in that it’s not a person manually running through a checklist or set of actions. The deployment still requires a single-click from a user. Actions: Get your environments set up and ready, Set access permissions appropriately, Make sure everyone understands what the environments will be used for (it’s not a “free-for-all” with all environments to be accessed, played with and changed by development). The Deployment Process As described earlier, most existing database deployment processes are pretty manual. The following is a description of a process we hear very often when we ask customers “How do your database changes get live? How does your manual process work?” Check pre-production matches production (use a schema compare tool, like SQL Compare). Sometimes done by taking a backup from production and restoring in to pre-prod, Again, use a schema compare tool to find the differences between the latest version of the database ready to go live (i.e. what the team have been developing). This generates a script, User (generally, the DBA), reviews the script. This often involves manually checking updates against a spreadsheet or similar, Run the script on pre-production, and check there are no errors (i.e. it upgrades pre-production to what you hoped), If all working, run the script on production.* * this assumes there’s no problem with production drifting away from pre-production in the interim time period (i.e. someone has hacked something in to the production box without going through the proper change management process). This difference could undermine the validity of your pre-production deployment test. Red Gate is currently working on a free tool to detect this problem – sign up here at www.sqllighthouse.com, if you’re interested in testing early versions. There are several variations on this process – some better, some much worse! How do you automate this? In particular, step 3 – surely you can’t automate a DBA checking through a script, that everything is in order!? The key point here is to plan what you want in your new deployment process. There are so many options. At one extreme, pure continuous deployment – whenever a dev checks something in to source control, the CI process runs (including extensive and thorough testing!), before the deployment process keys in and automatically deploys that change to the live box. Not for the faint hearted – and really not something we recommend. At the other extreme, you might be more comfortable with a semi-automated process – the pre-production/production matching process is automated (with an error thrown if these environments don’t match), followed by a manual intervention, allowing for script approval by the DBA. One he/she clicks “Okay, I’m happy for that to go live”, the latter stages automatically take the script through to live. And anything in between of course – and other variations. But we’d strongly recommended sitting down with a whiteboard and your team, and spending a couple of hours mapping out “What do we do now?”, “What do we actually want?”, “What will satisfy our needs for continuous delivery, but still maintaining some sort of continuous control over the process?” NB: Most of what we’re discussing here is about production deployments. It’s important to note that you will also need to map out a deployment process for earlier environments (for example QA). However, these are likely to be less onerous, and many customers opt for a much more automated process for these boxes. Actions: Sit down with your team and a whiteboard, and draw out the answers to the questions above for your production deployments – “What do we do now?”, “What do we actually want?”, “What will satisfy our needs for continuous delivery, but still maintaining some sort of continuous control over the process?” Repeat for earlier environments (QA and so on). Rollback and Recovery If only every deployment went according to plan! Unfortunately they don’t – and when things go wrong, you need a rollback or recovery plan for what you’re going to do in that situation. Once you move in to a more automated database deployment process, you’re far more likely to be deploying more frequently than before. No longer once every 6 months, maybe now once per week, or even daily. Hence the need for a quick rollback or recovery process becomes paramount, and should be planned for. NB: These are mainly scenarios for handling rollbacks after the transaction has been committed. If a failure is detected during the transaction, the whole transaction can just be rolled back, no problem. There are various options, which we’ll explore in subsequent articles, things like: Immediately restore from backup, Have a pre-tested rollback script (remembering that really this is a “roll-forward” script – there’s not really such a thing as a rollback script for a database!) Have fallback environments – for example, using a blue-green deployment pattern. Different options have pros and cons – some are easier to set up, some require more investment in infrastructure; and of course some work better than others (the key issue with using backups, is loss of the interim transaction data that has been added between the failed deployment and the restore). The best mechanism will be primarily dependent on how your application works and how much you need a cast-iron failsafe mechanism. Actions: Work out an appropriate rollback strategy based on how your application and business works, your appetite for investment and requirements for a completely failsafe process. Development Practices This is perhaps the more difficult area for people to tackle. The process by which you can deploy database updates is actually intrinsically linked with the patterns and practices used to develop that database and linked application. So you need to decide whether you want to implement some changes to the way your developers actually develop the database (particularly schema changes) to make the deployment process easier. A good example is the pattern “Branch by abstraction”. Explained nicely here, by Martin Fowler, this is a process that can be used to make significant database changes (e.g. splitting a table) in a step-wise manner so that you can always roll back, without data loss – by making incremental updates to the database backward compatible. Slides 103-108 of the following slidedeck, from Niek Bartholomeus explain the process: https://speakerdeck.com/niekbartho/orchestration-in-meatspace As these slides show, by making a significant schema change in multiple steps – where each step can be rolled back without any loss of new data – this affords the release team the opportunity to have zero-downtime deployments with considerably less stress (because if an increment goes wrong, they can roll back easily). There are plenty more great patterns that can be implemented – the book Refactoring Databases, by Scott Ambler and Pramod Sadalage is a great read, if this is a direction you want to go in: http://www.amazon.com/Refactoring-Databases-Evolutionary-paperback-Addison-Wesley/dp/0321774515 But the question is – how much of this investment are you willing to make? How often are you making significant schema changes that would require these best practices? Again, there’s a difference here between migrating old projects and starting afresh – with the latter it’s much easier to instigate best practice from the start. Actions: For your business, work out how far down the path you want to go, amending your database development patterns to “best practice”. It’s a trade-off between implementing quality processes, and the necessity to do so (depending on how often you make complex changes). Socialise these changes with your development group. No-one likes having “best practice” changes imposed on them, so good to introduce these ideas and the rationale behind them early.   Summary The next stages of implementing a continuous delivery pipeline for your database changes (once you have CI up and running) require a little pre-planning, if you want to get the most out of the work, and for the implementation to go smoothly. We’ve covered some of the checklist of areas to consider – mainly in the areas of “Getting the team ready for the changes that are coming” and “Planning our your pipeline, environments, patterns and practices for development”, though there will be more detail, depending on where you’re coming from – and where you want to get to. This article is part of our database delivery patterns & practices series on Simple Talk. Find more articles for version control, automated testing, continuous integration & deployment.

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  • Touchpad not working on an Acer One 725

    - by big-marc
    I installed ubuntu on a usb drive on a acer one 725, and cannot seem to be able to make the touchpad work....here is what i have xinpbig-marc@Big-Marc:~$ xinput --list ? Virtual core pointer id=2 [master pointer (3)] ? ? Virtual core XTEST pointer id=4 [slave pointer (2)] ? ? Logitech USB Optical Mouse id=10 [slave pointer (2)] ? ? ETPS/2 Elantech Touchpad id=13 [slave pointer (2)] any can help me out....

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  • How can I change my cursor behavior?

    - by Doug Clement
    When I am typing, my mouse cursor, if left on the text, will eventually auto-click in whatever space in the the text box I happen to be, causing me to type in the middle of a sentence. Also, the cursor in the text box will frequently stop mid-word and the screen will scroll down all of a sudden when pressing the space bar while typing. My question is, how do I change this behavior because it is driving me absolutely bat crap crazy. I have an Acer Aspire One D257 Netbook. I am not sure if it's a Xubuntu problem because it does this while I am using Windows 7 too. Any help would be nice, thanks!

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  • Hey You! Stop Using the Apply Button and Just Click OK! [Geek Rants]

    - by The Geek
    As a computer geek, I often find myself helping people, and watching them change settings on their PC… and they almost always click the Apply button, and then the OK button. Why? Whenever you encounter a dialog box in Windows, there are the standard OK, Cancel, Apply buttons—but you don’t actually have to click the Apply button first. The OK button does the same thing, saves the settings, and then closes the dialog box… saving you an extra click. Don’t believe me? Try it out for yourself. Only the worst possible application won’t behave that way, and you probably don’t want to use that type of application to begin with. The only exception to this rule is a multiple tab dialog box, on a badly written application. Sometimes… your settings on one tab won’t stick unless you click Apply. Note that in this particular case, you can make changes in any one of the tabs, and they will carry through without having to click Apply, because this dialog window is well written. We’re just using the screenshot as an example of a multiple tab setting interface. So now that you know better, you can tell us… do you always use the Apply button first? Have you ever found an instance where it behaves differently? Similar Articles Productive Geek Tips Got Awesome Skills? Why Not Write for How-To Geek?Customize Your Windows Vista Logon ScreenUse Outlook Rules to Prevent "Oh No!" After Sending EmailsGot Awesome Geek Skills? The How-To Geek is Looking for WritersQuick Firefox UI Tweaks TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 Recycle ! Find That Elusive Icon with FindIcons Looking for Good Windows Media Player 12 Plug-ins? Find Out the Celebrity You Resemble With FaceDouble Whoa ! Use Printflush to Solve Printing Problems

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  • Role based access control in Oracle VM using Enterprise Manager 12c

    - by Ronen Kofman
    Enterprise Managers let’s you control any element in the environment and define which users can do what on each element. We will show here an example on how to set up RBAC (Role Base Access Control) for Oracle VM using Enterprise Manager, this will be a very simplified explanation  to help you get going. For more comprehensive explanations please refer to the Enterprise Manager User Guide. OK, first some basic Enterprise Manager terminology: Target – any element in the environment is a target – server, pool, zone, VM etc. Administrators – these are the Enterprise Manager users who can login to the platform. Roles – roles are privilege profiles which could be applied to Administrators. The first step will be to discover the virtual environment and bring it in to Enterprise Manager, this process is simple and can be done in two ways: Work on your Oracle VM manager, set it up until you feel comfortable and then register it in Enterprise Manager Use Enterprise Manager and build it all from there. In both cases we will be able to see the same picture from Oracle VM and from Enterprise Manager, any change made in one will be reflected in the other. Oracle VM Manager: Enterprise Manager: Once you have your virtual environment set up in Enterprise Manager it is time to start associating VMs with users (or Administrators as they are called in Enterprise Manager). Enterprise Manager allows us to connect to multiple different identity services and import users from them but the simplest way to add Administrators is just go to setup->security->Administrators and create new Administrator. The creation wizard will walk you through several stages and allow you to assign role(s) to your newly created Administrator, using roles can really shorten the process if done multiple times. When you get to “Target Privileges” stage, scroll down to the bottom to the “Target Privileges” section. In this section you can add targets (virtual machine in our case) and define the type of privileges you would like to assign to the Administrator which you are creating. In this example I chose one of the VMs and granted full privileges to the newly created Administrator. Administrator creation wizard "Target Privileges": Now when you login as the newly created administrator, you will only see the VM that was assign to you and will be able to have full control over it. That’s it, simple and straight forward, Enterprise Manager offers many more things which I skipped here but the point is that if you need role based access control Enterprise Manager can give it to you in a very easy way. Oh and one more thing, virtualization management in Enterprise Manager has no license cost, sweet.

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  • How to create projection/view matrix for hole in the monitor effect

    - by Mr Bell
    Lets say I have my XNA app window that is sized at 640 x 480 pixels. Now lets say I have a cube model with its poly's facing in to make a room. This cube is sized 640 units wide by 480 units high by 480 units deep. Lets say the camera is somewhere in front of the box looking at it. How can I set up the view and projection matrices such that the front edge of the box lines up exactly with the edges of the application window? It seems like this should probably involve the Matrix.CreatePerspectiveOffCenter method, but I don't fully understand how the parameters translate on to the screen. For reference, the end result will be something like Johhny Lee's wii head tracking demo: http://www.youtube.com/watch?v=Jd3-eiid-Uw&feature=player_embedded P.S. I realize that his source code is available, but I am afraid I haven't been able to make heads or tails out of it.

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  • Should devs, testers and business users have one unified test script?

    - by Carlos Jaime C. De Leon
    In development, I would normally have my own test scripts that would document the data, scenarios and execution steps that I plan to test; this is my dev test plan. When the functionality has been deployed to Test, testers test it using their own test script that they wrote. In UAT, the business user then tests using their own test plan. In retrospect, it looks like this provides a better coverage, with dev tests having a mix of black and white box testing, while testers and business users focus on black box testing. But on the other hand, this brings up distinct test cases that only are executed per stage (ie. some cases which testers thought of are only executed on Test stage) and it would like the dev missed it, which makes it a finding/bug. Is it worth consolidating the test scripts from the start? Thus using one unified test script, or is it abit difficult to do this upfront?

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  • Using Hadooop (HDInsight) with Microsoft - Two (OK, Three) Options

    - by BuckWoody
    Microsoft has many tools for “Big Data”. In fact, you need many tools – there’s no product called “Big Data Solution” in a shrink-wrapped box – if you find one, you probably shouldn’t buy it. It’s tempting to want a single tool that handles everything in a problem domain, but with large, complex data, that isn’t a reality. You’ll mix and match several systems, open and closed source, to solve a given problem. But there are tools that help with handling data at large, complex scales. Normally the best way to do this is to break up the data into parts, and then put the calculation engines for that chunk of data right on the node where the data is stored. These systems are in a family called “Distributed File and Compute”. Microsoft has a couple of these, including the High Performance Computing edition of Windows Server. Recently we partnered with Hortonworks to bring the Apache Foundation’s release of Hadoop to Windows. And as it turns out, there are actually two (technically three) ways you can use it. (There’s a more detailed set of information here: http://www.microsoft.com/sqlserver/en/us/solutions-technologies/business-intelligence/big-data.aspx, I’ll cover the options at a general level below)  First Option: Windows Azure HDInsight Service  Your first option is that you can simply log on to a Hadoop control node and begin to run Pig or Hive statements against data that you have stored in Windows Azure. There’s nothing to set up (although you can configure things where needed), and you can send the commands, get the output of the job(s), and stop using the service when you are done – and repeat the process later if you wish. (There are also connectors to run jobs from Microsoft Excel, but that’s another post)   This option is useful when you have a periodic burst of work for a Hadoop workload, or the data collection has been happening into Windows Azure storage anyway. That might be from a web application, the logs from a web application, telemetrics (remote sensor input), and other modes of constant collection.   You can read more about this option here:  http://blogs.msdn.com/b/windowsazure/archive/2012/10/24/getting-started-with-windows-azure-hdinsight-service.aspx Second Option: Microsoft HDInsight Server Your second option is to use the Hadoop Distribution for on-premises Windows called Microsoft HDInsight Server. You set up the Name Node(s), Job Tracker(s), and Data Node(s), among other components, and you have control over the entire ecostructure.   This option is useful if you want to  have complete control over the system, leave it running all the time, or you have a huge quantity of data that you have to bulk-load constantly – something that isn’t going to be practical with a network transfer or disk-mailing scheme. You can read more about this option here: http://www.microsoft.com/sqlserver/en/us/solutions-technologies/business-intelligence/big-data.aspx Third Option (unsupported): Installation on Windows Azure Virtual Machines  Although unsupported, you could simply use a Windows Azure Virtual Machine (we support both Windows and Linux servers) and install Hadoop yourself – it’s open-source, so there’s nothing preventing you from doing that.   Aside from being unsupported, there are other issues you’ll run into with this approach – primarily involving performance and the amount of configuration you’ll need to do to access the data nodes properly. But for a single-node installation (where all components run on one system) such as learning, demos, training and the like, this isn’t a bad option. Did I mention that’s unsupported? :) You can learn more about Windows Azure Virtual Machines here: http://www.windowsazure.com/en-us/home/scenarios/virtual-machines/ And more about Hadoop and the installation/configuration (on Linux) here: http://en.wikipedia.org/wiki/Apache_Hadoop And more about the HDInsight installation here: http://www.microsoft.com/web/gallery/install.aspx?appid=HDINSIGHT-PREVIEW Choosing the right option Since you have two or three routes you can go, the best thing to do is evaluate the need you have, and place the workload where it makes the most sense.  My suggestion is to install the HDInsight Server locally on a test system, and play around with it. Read up on the best ways to use Hadoop for a given workload, understand the parts, write a little Pig and Hive, and get your feet wet. Then sign up for a test account on HDInsight Service, and see how that leverages what you know. If you're a true tinkerer, go ahead and try the VM route as well. Oh - there’s another great reference on the Windows Azure HDInsight that just came out, here: http://blogs.msdn.com/b/brunoterkaly/archive/2012/11/16/hadoop-on-azure-introduction.aspx  

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  • New release of Microsoft All-In-One Code Framework is available for download - March 2011

    - by Jialiang
    A new release of Microsoft All-In-One Code Framework is available on March 8th. Download address: http://1code.codeplex.com/releases/view/62267#DownloadId=215627 You can download individual code samples or browse code samples grouped by technology in the updated code sample index. If it’s the first time that you hear about Microsoft All-In-One Code Framework, please read this Microsoft News Center article http://www.microsoft.com/presspass/features/2011/jan11/01-13codeframework.mspx, or watch the introduction video on YouTube http://www.youtube.com/watch?v=cO5Li3APU58, or read the introduction on our homepage http://1code.codeplex.com/. -------------- New Silverlight code samples CSSLTreeViewCRUDDragDrop Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215808 The code sample was created by Amit Dey. It demonstrates a custom TreeView with added functionalities of CRUD (Create, Read, Update, Delete) and drag-and-drop operations. Silverlight TreeView control with CRUD and drag & drop is a frequently asked programming question in Silverlight  forums. Many customers also requested this code sample in our code sample request service. We hope that this sample can reduce developers' efforts in handling this typical programming scenario. The following blog article introduces the sample in detail: http://blogs.msdn.com/b/codefx/archive/2011/02/15/silverlight-treeview-control-with-crud-and-drag-amp-drop.aspx. CSSL4FileDragDrop and VBSL4FileDragDrop Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215809 http://1code.codeplex.com/releases/view/62253#DownloadId=215810 The code sample demonstrates the new drag&drop feature of Silverlight 4 to implement dragging picures from the local file system to a Silverlight application.   Sometimes we want to change SiteMapPath control's titles and paths according to Query String values. And sometimes we want to create the SiteMapPath dynamically. This code sample shows how to achieve these goals by handling SiteMap.SiteMapResolve event. CSASPNETEncryptAndDecryptConfiguration, VBASPNETEncryptAndDecryptConfiguration Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215027 http://1code.codeplex.com/releases/view/62253#DownloadId=215106 In this sample, we encrypt and decrypt some sensitive information in the config file of a web application by using the RSA asymmetric encryption. This project contains two snippets. The first one demonstrates how to use RSACryptoServiceProvider to generate public key and the corresponding private key and then encrypt/decrypt string value on page. The second part shows how to use RSA configuration provider to encrypt and decrypt configuration section in web.config of web application. connectionStrings section in plain text: Encrypted connectionString:  Note that if you store sensitive data in any of the following configuration sections, we cannot encrypt it by using a protected configuration provider <processModel> <runtime> <mscorlib> <startup> <system.runtime.remoting> <configProtectedData> <satelliteassemblies> <cryptographySettings> <cryptoNameMapping> CSASPNETFileUploadStatus Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215028 I believe ASP.NET programmers will like this sample, because in many cases we need customers know the current status of the uploading files, including the upload speed and completion percentage and so on. Under normal circumstances, we need to use COM components to accomplish this function, such as Flash, Silverlight, etc. The uploading data can be retrieved in two places, the client-side and the server-side. For the client, for the safety factors, the file upload status information cannot be got from JavaScript or server-side code, so we need COM component, like Flash and Silverlight to accomplish this, I do not like this approach because the customer need to install these components, but also we need to learn another programming framework. For the server side, we can get the information through coding, but the key question is how to tell the client results. In this case, We will combine custom HTTPModule and AJAX technology to illustrate how to analyze the HTTP protocol, how to break the file request packets, how to customize the location of the server-side file caching, how to return the file uploading status back to the client and so on . CSASPNETHighlightCodeInPage, VBASPNETHighlightCodeInPage Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215029 http://1code.codeplex.com/releases/view/62253#DownloadId=215108 This sample imitates a system that needs display the highlighted code in an ASP.NET page . As a matter of fact, sometimes we input code like C# or HTML in a web page and we need these codes to be highlighted for a better reading experience. It is convenient for us to keep the code in mind if it is highlighted. So in this case, the sample shows how to highlight the code in an ASP.NET page. It is not difficult to highlight the code in a web page by using String.Replace method directly. This  method can return a new string in which all occurrences of a specified string in the current instance are replaced with another specified string. However, it may not be a good idea, because it's not extremely fast, in fact, it's pretty slow. In addition, it is hard to highlight multiple keywords by using String.Replace method directly. Sometimes we need to copy source code from visual studio to a web page, for readability purpose, highlight the code is important while set the different types of keywords to different colors in a web page by using String.Replace method directly is not available. To handle this issue, we need to use a hashtable variable to store the different languages of code and their related regular expressions with matching options. Furthermore, define the css styles which used to highlight the code in a web page. The sample project can auto add the style object to the matching string of code. A step-by-step guide illustrating how to highlight the code in an ASP.NET page: 1. the HighlightCodePage.aspx page Choose a type of language in the dropdownlist control and paste the code in the textbox control, then click the HighLight button. 2.  Display the highlighted code in an ASP.NET page After user clicks the HighLight button, the highlighted code will be displayed at right side of the page.        CSASPNETPreventMultipleWindows Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215032 This sample demonstrates a step-by-step guide illustrating how to detect and prevent multiple windows or tab usage in Web Applications. The sample imitates a system that need to prevent multiple windows or tabs to solve some problems like sharing sessions, protect duplicated login, data concurrency, etc. In fact, there are many methods achieving this goal. Here we give a solution of use JavaScript, Sample shows how to use window.name property check the correct links and throw other requests to invalid pages. This code-sample use two user controls to make a distinction between base page and target page, user only need drag different controls to appropriate web form pages. so user need not write repetitive code in every page, it will make coding work lightly and convenient for modify your code.  JSVirtualKeyboard Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215093 This article describes an All-In-One framework sample that demonstrates a step-by-step guide illustrating how to build a virtual keyboard in your HTML page. Sometimes we may need to offer a virtual keyboard to let users input something without their real keyboards. This scenario often occurs when users will enter their password to get access to our sites and we want to protect the password from some kinds of back-door software, a Key-logger for example, and we will find a virtual keyboard on the page will be a good choice here. To create a virtual keyboard, we firstly need to add some buttons to the page. And when users click on a certain button, the JavaScript function handling the onclick event will input an appropriated character to the textbox. That is the simple logic of this feature. However, if we indeed want a virtual keyboard to substitute for the real keyboard completely, we will need more advanced logic to handle keys like Caps-Lock and Shift etc. That will be a complex work to achieve. CSASPNETDataListImageGallery Download: http://1code.codeplex.com/releases/view/62261#DownloadId=215267 This code sample demonstrates how to create an Image Gallery application by using the DataList control in ASP.NET. You may find the Image Gallery is widely used in many social networking sites, personal websites and E-Business websites. For example, you may use the Image Gallery to show a library of personal uploaded images on a personal website. Slideshow is also a popular tool to display images on websites. This code sample demonstrates how to use the DataList and ImageButton controls in ASP.NET to create an Image Gallery with image navigation. You can click on a thumbnail image in the Datalist control to display a larger version of the image on the page. This sample code reads the image paths from a certain directory into a FileInfo array. Then, the FileInfo array is used to populate a custom DataTable object which is bound to the Datalist control. This code sample also implements a custom paging system that allows five images to be displayed horizontally on one page. The following link buttons are used to implement a custom paging system:   •     First •     Previous •     Next •     Last Note We recommend that you use this method to load no more than five images at a time. You can also set the SelectedIndex property for the DataList control to limit the number of the thumbnail images that can be selected. To indicate which image is selected, you can set the SelectedStyle property for the DataList control. VBASPNETSearchEngine Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215112 This sample shows how to implement a simple search engine in an ASP.NET web site. It uses LIKE condition in SQL statement to search database. Then it highlights keywords in search result by using Regular Expression and JavaScript. New Windows General code samples CSCheckEXEType, VBCheckEXEType Downloads: http://1code.codeplex.com/releases/view/62253#DownloadId=215045 http://1code.codeplex.com/releases/view/62253#DownloadId=215120 The sample demonstrates how to check an executable file type.  For a given executable file, we can get 1 whether it is a console application 2 whether it is a .Net application 3 whether it is a 32bit native application. 4 The full display name of a .NET application, e.g. System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=MSIL New Internet Explorer code samples CSIEExplorerBar, VBIEExplorerBar Downloads: http://1code.codeplex.com/releases/view/62253#DownloadId=215060 http://1code.codeplex.com/releases/view/62253#DownloadId=215133 The sample demonstrates how to create and deploy an IE Explorer Bar which could list all the images in a web page. CSBrowserHelperObject, VBBrowserHelperObject Downloads: http://1code.codeplex.com/releases/view/62253#DownloadId=215044 http://1code.codeplex.com/releases/view/62253#DownloadId=215119 The sample demonstrates how to create and deploy a Browser Helper Object,  and the BHO in this sample is used to disable the context menu in IE. New Windows Workflow Foundation code samples CSWF4ActivitiesCorrelation Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215085 Consider that there are two such workflow instances:       start                                   start          |                                           | Receive activity      Receive activity         |                                           | Receive2 activity      Receive2 activity         |                                           | A WCF request comes to call the second Receive2 activity. Which one should take care of the request? The answer is Correlation. This sample will show you how to correlate two workflow service to work together. -------------- New ASP.NET code samples CSASPNETBreadcrumbWithQueryString Download: http://1code.codeplex.com/releases/view/62253#DownloadId=215022

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  • DNS slowdowns on development environment

    - by Sequenzia
    I have a local development environment setup on my Mac. I am running an Ubuntu Web Server inside of a Virtual Box VM. I setup a host file on my Mac that points my dev site to the IP of the Ubuntu Virtual Server. Everything works good other than the fact a lot (not all) of the time it takes more than 5 seconds to load a page. I used firebug to track down where the problem is and when it's slow the DNS part of my request is taking over 5 seconds. Like I said it's not all the time. Sometimes it resolves and loads the page within milliseconds. The same page one click will be super fast and then the next time it takes over 5 seconds. It's really slowing me down and I am not sure what is causing it. Anyone have any ideas? Any help would be great. Thank

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  • Photosynth Panoramic Deep Zoom Mosaic

    18 years ago Virtual Reality was all the rage remember The Lawnmower Man? 16 years ago Apple came out with QuickTime VR which changed the way people experienced panoramic photos on the web. QuickTime VR (virtual reality) (also known as QTVR) is a type of image file format supported by Apple's QuickTime. It allows the creation and viewing of photographically captured panoramas and the exploration of objects through images taken at multiple viewing angles. It functions as a plug-in for QuickTime. QuickTime...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Improve email Delivery Rates

    - by JMC
    I have a web server that sends legitimate transactional email in high quantities. A reasonable percentage of users report that they never receive the emails. For every message sent, there's also a blind carbon copy going to an unfiltered email box on a different provider that I review to ensure the server actually sent the emails. All of the emails make it to my bcc box, so the server is sending the emails properly. It seems to be a spam filtering problem at other email providers. The hosting provider for the web server indicates a reverse dns lookup has been set at their level linking the emails ip address properly to my server and domain. Question: Is there anything else I can do to improve the rate that 3rd party service providers are filtering the emails I'm sending? Is there anything I can set on the DNS that I control to show that the server sending the emails is legitimate?

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  • Juju didn't configure rabbitmq for openstack?

    - by SaM
    I have installed ubuntu Openstack HA with juju with all 24 servers. But my openstack is not working at all. On dashboard on every page I get errors saying "could not retrieve usage information", "could not retrieve volume information, "could not retrieve .....etc I spent hours and have discovered that juju has not done configuration correctly. I found that on cloud controller in nova.conf juju has added rabitmq vhost enrty, but that virtual host is not added in rabbitmq. Then how is its suppose to work? And on juju-gui canvas rabbimq is all green and is working fine, which in reality its not. I am really wondering if juju has really done correct configuration in all 24 servers now, I am getting the feeling that it would have been faster if I would have done openstack deployment manually instead of using juju. Why was the virtual host entry not added in rabbitmq? How should I solve this?

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  • Installing gdm on headless Server Edition

    - by Andrew Koester
    I have Ubuntu Server running on a headless box, which is right now, almost entirely doing only software RAID and feels a little underused. I'd like to get into using Ubuntu as a desktop a little more. What do I need to do (install/etc.) to get Gnome while keeping the box itself headless? I'm not sure which packages to install or which steps to take. I figure I'll just use X over the network (Xming or the like) but something like NX might work.

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  • Oracle Ebusiness Suite 12.1.3 Oracle VM templates

    - by wcoekaer
    Steven Chan just published a great blog entry that talks about the release of a new set of Oracle VM templates. Oracle Ebusiness Suite 12.1.3. You can find the blog post here. Templates are available for: E-Business Suite 12.1.3 Vision (64-bit) E-Business Suite 12.1.3 Production (32-bit) E-Business Suite 12.x Sparse Middle Tiers (32-bit and 64-bit) Thanks Steven! Why does this stuff matter? Well, in general, virtualization (or cloud) solutions provide an easy way to create Virtual Machines. Whether it's through a "cloud api" or just a virtualization API. But all you end up with, in the end, is still just a Virtual Machine... Maybe with an OS pre-installed/pre-configured. So you have flexibility of moving VMs around and providing a VM but what about the actual applications (anything more than a very basic app)? The application administrator then still has to go and install and configure the OS for that application and install the application and its patches and basic configuration so that the application user then can go in. Building gold images for complex software stacks that are not owned by the users/admins is always very difficult. With our templates, we provide a number of things : Oracle Linux pre-installed and pre-configured with the minimum required packages for that application to run. (so it's secure) Oracle Linux can be distributed and used for free or with a support subscription. There is no trial license, there is no registration key, no alpha version or community version versus enterprise version. You get what we provide in our engineered systems, what we provide support for, without change. Supported out of the box. No virtual Trial appliances, no prototypes, no POC. What you download is production ready without change. The applications are installed by the developers of the application. The database team builds database templates, the applications engineering team builds applications templates. The first boot/configuration scripts ask for the basic information such as hostname, ip address, user passwords and then go off and set everything up correctly. All tested together - application - operating system - hypervisor. not 3 (or more) products from 3(or more) different companies.

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  • Installing Yaws server on Ubuntu 12.04 (Using a cloud service)

    - by Lee Torres
    I'm trying to get a Yaws web server working on a cloud service (Amazon AWS). I've compilled and installed a local copy on the server. My problem is that I can't get Yaws to run while running on either port 8000 or port 80. I have the following configuration in yaws.conf: port = 8000 listen = 0.0.0.0 docroot = /home/ubuntu/yaws/www/test dir_listings = true This produces the following successful launch/result: Eshell V5.8.5 (abort with ^G) =INFO REPORT==== 16-Sep-2012::17:21:06 === Yaws: Using config file /home/ubuntu/yaws.conf =INFO REPORT==== 16-Sep-2012::17:21:06 === Ctlfile : /home/ubuntu/.yaws/yaws/default/CTL =INFO REPORT==== 16-Sep-2012::17:21:06 === Yaws: Listening to 0.0.0.0:8000 for <3> virtual servers: - http://domU-12-31-39-0B-1A-F6:8000 under /home/ubuntu/yaws/www/trial - =INFO REPORT==== 16-Sep-2012::17:21:06 === Yaws: Listening to 0.0.0.0:4443 for <1> virtual servers: - When I try to access the the url (http://ec2-72-44-47-235.compute-1.amazonaws.com), it never connects. I've tried using paping to check if port 80 or 8000 is open(http://code.google.com/p/paping/) and I get a "Host can not be resolved" error, so obviously something isn't working. I've also tried setting the yaws.conf so its at Port 80, appearing like this: port = 8000 listen = 0.0.0.0 docroot = /home/ubuntu/yaws/www/test dir_listings = true and I get the following error: =ERROR REPORT==== 16-Sep-2012::17:24:47 === Yaws: Failed to listen 0.0.0.0:80 : {error,eacces} =ERROR REPORT==== 16-Sep-2012::17:24:47 === Can't listen to socket: {error,eacces} =ERROR REPORT==== 16-Sep-2012::17:24:47 === Top proc died, terminate gserv =ERROR REPORT==== 16-Sep-2012::17:24:47 === Top proc died, terminate gserv =INFO REPORT==== 16-Sep-2012::17:24:47 === application: yaws exited: {shutdown,{yaws_app,start,[normal,[]]}} type: permanent {"Kernel pid terminated",application_controller," {application_start_failure,yaws,>>>>>>{shutdown,>{yaws_app,start,[normal,[]]}}}"} I've also opened up the port 80 using iptables. Running sudo iptables -L gives this output: Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- ip-192-168-2-0.ec2.internal ip-192-168-2-16.ec2.internal tcp dpt:http ACCEPT tcp -- 0.0.0.0 anywhere tcp dpt:http ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED ACCEPT tcp -- anywhere anywhere tcp dpt:http ACCEPT tcp -- anywhere anywhere tcp dpt:http Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination In addition, I've gone to the security group panel in the Amazon AWS configuration area, and add ports 80, 8000, and 8080 to ip source 0.0.0.0 Please note: if you try to access the URL of the virtual server now, it likely won't connect because I'm not running currently running the yaws daemon. I've tested it when I've run yaws either through yaws or yaws -i Thanks for the patience

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  • Trouble switching to Dvorak on Ubuntu 12.04

    - by Dodgie
    I've decided to switch to Dvorak on my Ubuntu machine, but I'm having some trouble: First, I attempted to do this through the GUI -- System Settings - Keyboard Layout - add layout (plus sign) - English(programmer Dvorak). This didn't work at first, so I restarted my machine. It seemed to work at the password prompt (if only because QWERTY did not), but I couldn't get it to accept my password. I used the virtual keyboard option to enter my password with mouse clicks (the virtual keyboard was using the programmer's Dvorak Standard) and was able to get in that way. Once logged in, however, I was back to QWERTY. Second, I tried to switch on the command prompt -- $ loadkeys /usr/lib/kbd/keytables/dvorak.map The error message I received was "Couldn't get a file descriptor referring to the console " Does anyone know what I'm doing wrong? I've looked for a solution for these problems, but couldn't find anything.

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  • Programmers and tech email: Do you actually read all of them?

    - by AdityaGameProgrammer
    Email Alerts, Blog /Forum updates, discussion subscriptions general programming/technology update emails that we often subscribe to.Do you actually read them ? or go direct to the source when you find time. often we might the mail of programmers filled with loads of unread subscription mail from technology they previously were following or worked on or things they wish to follow .some or a majority of these mail just keep on piling up . i personally have few updates that i wish i read but constantly avoid and keep of for latter and finally delete them in effort keep the in box clean. few questions come to mind regarding this Do you keep such mail in separate accounts? Do you read all the mail you have subscribed to? Do you ever unsubscribe to any such email if you aren't reading them? How much do you really value these email. Lastly do you keep your in box clean ? wish to deal with this in a better way.

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  • Elastic PaaS with WebLogic and OpenStack, part I

    - by Jernej Kaše
    In my previous blog I described the steps to get OpenStack on Solaris up and running. Now we'll explore how WebLogic and OpenStack can work together to deliver truly elastic Middleware Platform as a Service. Middleware / Platform as a Service goals First, let's define what PaaS should be : PaaS offerings facilitate the deployment of applications without the complexity of managing the underlying hardware and software and provisioning hosting capabilities. To break it down: - PaaS provides a complete platform for hosting solutions (Java EE, SOA, BPM, ...) - Infrastructure provisioning (virtual machine, OS, platform) and managing is hidden from the PaaS user [administrator or developer] - Additionally, PaaS could / should define target SLAs, and the platform should ensure the SLAs are meet automatically. PaaS use case To make it more tangible, we have an IT Administrator who has the requirement to deploy a Java EE enterprise application. The application is used by external users who need to submit reports by the end of each month. As a result, the number of concurrent users will fluctuate, with expected huge spikes around the end of each month. The SLA agreed by the management is that no more than 100 requests should be waiting to be processes at any given time. In addition, the IT admin has no more than 3 days to have the platform and the application operational. The Challenges Some of the challenges the IT Administrator is facing are: - how are we going to ensure the processing power? - how are we going to provision the (virtual) machines, Java EE platform and deploy the application? - how are we going to monitor the SLA? - how are we going to react to SLA, and increase capacity?  The Ideal Solution Ideally, the whole process should be automated, "set it and forget" and require no human interaction: - The vendor packages the solution as deployable image(s) - The images are deployed to the IaaS - From there, automated processes take care of SLA  Solution Architecture with WebLogic 12c, Dynamic Clusters, OpenStack & Solaris OracleSolaris provides OS and virtualisation through Solaris Zones OpenStack is a part of Solaris 11.2 and provides Cloud Management (console and API) WebLogic 12c with Dynamic Clusters provides the Platform Trafic Manager provides load balancing On top of out that, we are going to implement a small control script - Cloud Manager - which is going to monitor SLA through WebLogic Diagnostic Framework. In case there are more than 100 pending requests, the script will: - provision a new virtual machine based on image which is configured for the WebLogic domain - add the machine to WebLogic domain - Increase the number of servers in dynamic cluster - Start the newly provisioned server  Stay tuned for part II The hole solution with working demo will be presented in one of our Partner WebCasts in June, exact date TBA. Jernej Kaše is a Fusion Middleware Specialist working closely with Oracle Partners in the ECEMEA region to grow their business by leveraging Oracle technology.

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  • Fan control on Acer Aspire One D255 netbook

    - by AdamB
    I have Ubuntu netbook edition on my Acer Aspire One D255 netbook and I notice that I always hear the fan working at 100% despite the actual temperature. I run the sensors command its only at 13c, theres no reason why the fan needs to be running this hard at that temp. root@adam-netbook:~# sensors acpitz-virtual-0 Adapter: Virtual device temp1: +13.0°C (crit = +100.0°C) I'm guessing I may need some drivers in order to interact with the fan? Does anyone have any experience with this? It also seems that "sensors" may not be all that accurate, the temperature never seems to fluctuate.

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