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  • Agile isn’t always Agile

    - by BuckWoody
    I want to make a disclaimer before I dive into this topic – At Microsoft we use all kinds of development methodologies, and I’ve worked in lots of other shops using lots of methodologies. This is one of those “religious” topics like which programming language or database is best, and is bound to generate some heat. But this isn’t pointed towards one particular event or company. But I really don’t like Agile. In particular, I really don’t like Scrum. Let me explain. Agile is a methodology for developing software that emphasizes adapting to change more so than the traditional “waterfall” method of developing software. Within Agile is a process called a “scrum” meeting. The pitch goes that in this quick, stand-up meeting the people involved in the development project (which should include the DBA, but very often doesn’t) go around the room stating what they are working on, when that will be finished and what is keeping them from getting finished (“blockers”, these are called). Sounds all very non-threatening – we’re just “enabling” the developers to work more efficiently. And that’s what we all want, isn’t it? Except it doesn’t work. In my experience (and yours might be VERY different) this just turns into a micro-management environment, where devs have to defend their daily work. Of all the work environments I hate the most, micro-management environments are THE worst. I don’t like workign in them, and I don’t like creating them. The other issue I have with Scrum is that it makes your whole team task-focused. Everyone wants to make sure that they are not the “long pole” in the meeting (meaning that they aren’t the one that gets all the attention) so they only focus on safe, quick tasks. And although you have all of the boxes checked, the project does not go well at all – even when it does finish. Before you comment (and please do comment) I fully realize that Agile <> Scrum. But in my experience, it sometimes turns into that. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Why not use JavaScript but libraries instead?

    - by shareef
    I read this article Unobtrusive JavaScript with jQuery and I noticed these points in the slide page 11 some companies strip JavaScript at the firewall some run the NoScript Firefox extension to protect themselves from common XSS and CSRF attacks many mobile devices ignore JavaScript entirely screen readers do execute JavaScript but accessibility issues mean you may not want them to I did not understand the fourth point. What does it mean? I need your comment and responses on these points. Is not using JavaScript and switching to libraries like jQuery worth it?

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  • Guru of the Week n° 34 : les déclarations anticipées, un article de Herb Sutter traduit par la rédaction C++

    Les déclarations anticipées sont un moyen formidable d'éliminer les dépendances inutiles lors de la compilation. Mais voici un exemple de piège typique des déclarations anticipées... Comment l'éviteriez-vous ? Guru of the Week n° 34 : les déclarations anticipées Utilisez-vous dès que possible les déclarations anticipées ? Connaissiez-vous ces problèmes ? Retrouver l'ensemble des Guru of...

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  • Le pluriel dans les traductions avec Qt, un article de Jan-Arve Sæther traduit par Jonathan Courtois

    Bonjour, Dans la continuité des traductions des Qt Quarterly, je vous propose aujourd'hui un article expliquant comment gérer au mieux les formes du pluriel des différentes langues dans vos traductions. Les formes du pluriel dans les traductions Aviez-vous déjà connaissance de ces subtilités ? Cet article va-t-il améliorer la qualité des traductions de vos applications ?...

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  • Inversion of Control Resource

    - by MarkPearl
    Well… this is going to be another really short blog posting. I have been meaning to read more about IOC containers and came across this blog post which seemed to really explain the concept well – based on Castle Windsor. I also  enjoyed reading the replies about IOC on stack overflow and what it meant. If anyone knows of other good articles that explain the basics really well – wont you comment them to me.

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  • VS 2010 Debugger Improvements (BreakPoints, DataTips, Import/Export)

    - by ScottGu
    This is the twenty-first in a series of blog posts I’m doing on the VS 2010 and .NET 4 release.  Today’s blog post covers a few of the nice usability improvements coming with the VS 2010 debugger.  The VS 2010 debugger has a ton of great new capabilities.  Features like Intellitrace (aka historical debugging), the new parallel/multithreaded debugging capabilities, and dump debuging support typically get a ton of (well deserved) buzz and attention when people talk about the debugging improvements with this release.  I’ll be doing blog posts in the future that demonstrate how to take advantage of them as well.  With today’s post, though, I thought I’d start off by covering a few small, but nice, debugger usability improvements that were also included with the VS 2010 release, and which I think you’ll find useful. Breakpoint Labels VS 2010 includes new support for better managing debugger breakpoints.  One particularly useful feature is called “Breakpoint Labels” – it enables much better grouping and filtering of breakpoints within a project or across a solution.  With previous releases of Visual Studio you had to manage each debugger breakpoint as a separate item. Managing each breakpoint separately can be a pain with large projects and for cases when you want to maintain “logical groups” of breakpoints that you turn on/off depending on what you are debugging.  Using the new VS 2010 “breakpoint labeling” feature you can now name these “groups” of breakpoints and manage them as a unit. Grouping Multiple Breakpoints Together using a Label Below is a screen-shot of the breakpoints window within Visual Studio 2010.  This lists all of the breakpoints defined within my solution (which in this case is the ASP.NET MVC 2 code base): The first and last breakpoint in the list above breaks into the debugger when a Controller instance is created or released by the ASP.NET MVC Framework. Using VS 2010, I can now select these two breakpoints, right-click, and then select the new “Edit labels…” menu command to give them a common label/name (making them easier to find and manage): Below is the dialog that appears when I select the “Edit labels” command.  We can use it to create a new string label for our breakpoints or select an existing one we have already defined.  In this case we’ll create a new label called “Lifetime Management” to describe what these two breakpoints cover: When we press the OK button our two selected breakpoints will be grouped under the newly created “Lifetime Management” label: Filtering/Sorting Breakpoints by Label We can use the “Search” combobox to quickly filter/sort breakpoints by label.  Below we are only showing those breakpoints with the “Lifetime Management” label: Toggling Breakpoints On/Off by Label We can also toggle sets of breakpoints on/off by label group.  We can simply filter by the label group, do a Ctrl-A to select all the breakpoints, and then enable/disable all of them with a single click: Importing/Exporting Breakpoints VS 2010 now supports importing/exporting breakpoints to XML files – which you can then pass off to another developer, attach to a bug report, or simply re-load later.  To export only a subset of breakpoints, you can filter by a particular label and then click the “Export breakpoint” button in the Breakpoints window: Above I’ve filtered my breakpoint list to only export two particular breakpoints (specific to a bug that I’m chasing down).  I can export these breakpoints to an XML file and then attach it to a bug report or email – which will enable another developer to easily setup the debugger in the correct state to investigate it on a separate machine.  Pinned DataTips Visual Studio 2010 also includes some nice new “DataTip pinning” features that enable you to better see and track variable and expression values when in the debugger.  Simply hover over a variable or expression within the debugger to expose its DataTip (which is a tooltip that displays its value)  – and then click the new “pin” button on it to make the DataTip always visible: You can “pin” any number of DataTips you want onto the screen.  In addition to pinning top-level variables, you can also drill into the sub-properties on variables and pin them as well.  Below I’ve “pinned” three variables: “category”, “Request.RawUrl” and “Request.LogonUserIdentity.Name”.  Note that these last two variable are sub-properties of the “Request” object.   Associating Comments with Pinned DataTips Hovering over a pinned DataTip exposes some additional UI within the debugger: Clicking the comment button at the bottom of this UI expands the DataTip - and allows you to optionally add a comment with it: This makes it really easy to attach and track debugging notes: Pinned DataTips are usable across both Debug Sessions and Visual Studio Sessions Pinned DataTips can be used across multiple debugger sessions.  This means that if you stop the debugger, make a code change, and then recompile and start a new debug session - any pinned DataTips will still be there, along with any comments you associate with them.  Pinned DataTips can also be used across multiple Visual Studio sessions.  This means that if you close your project, shutdown Visual Studio, and then later open the project up again – any pinned DataTips will still be there, along with any comments you associate with them. See the Value from Last Debug Session (Great Code Editor Feature) How many times have you ever stopped the debugger only to go back to your code and say: $#@! – what was the value of that variable again??? One of the nice things about pinned DataTips is that they keep track of their “last value from debug session” – and you can look these values up within the VB/C# code editor even when the debugger is no longer running.  DataTips are by default hidden when you are in the code editor and the debugger isn’t running.  On the left-hand margin of the code editor, though, you’ll find a push-pin for each pinned DataTip that you’ve previously setup: Hovering your mouse over a pinned DataTip will cause it to display on the screen.  Below you can see what happens when I hover over the first pin in the editor - it displays our debug session’s last values for the “Request” object DataTip along with the comment we associated with them: This makes it much easier to keep track of state and conditions as you toggle between code editing mode and debugging mode on your projects. Importing/Exporting Pinned DataTips As I mentioned earlier in this post, pinned DataTips are by default saved across Visual Studio sessions (you don’t need to do anything to enable this). VS 2010 also now supports importing/exporting pinned DataTips to XML files – which you can then pass off to other developers, attach to a bug report, or simply re-load later. Combined with the new support for importing/exporting breakpoints, this makes it much easier for multiple developers to share debugger configurations and collaborate across debug sessions. Summary Visual Studio 2010 includes a bunch of great new debugger features – both big and small.  Today’s post shared some of the nice debugger usability improvements. All of the features above are supported with the Visual Studio 2010 Professional edition (the Pinned DataTip features are also supported in the free Visual Studio 2010 Express Editions)  I’ll be covering some of the “big big” new debugging features like Intellitrace, parallel/multithreaded debugging, and dump file analysis in future blog posts.  Hope this helps, Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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  • SQL SERVER – Tricks to Replace SELECT * with Column Names – SQL in Sixty Seconds #017 – Video

    - by pinaldave
    You might have heard many times that one should not use SELECT * as there are many disadvantages to the usage of the SELECT *. I also believe that there are always rare occasion when we need every single column of the query. In most of the cases, we only need a few columns of the query and we should retrieve only those columns. SELECT * has many disadvantages. Let me list a few and remaining you can add as a comment.  Retrieves unnecessary columns and increases network traffic When a new columns are added views needs to be refreshed manually Leads to usage of sub-optimal execution plan Uses clustered index in most of the cases instead of using optimal index It is difficult to debug. There are two quick tricks I have discussed in the video which explains how users can avoid using SELECT * but instead list the column names. 1) Drag the columns folder from SQL Server Management Studio to Query Editor 2) Right Click on Table Name >> Script TAble AS >> SELECT To… >> Select option It is extremely easy to list the column names in the table. In today’s sixty seconds video, you will notice that I was able to demonstrate both the methods very quickly. From now onwards there should be no excuse for not listing ColumnName. Let me ask a question back – is there ever a reason to SELECT *? If yes, would you please share that as a comment. More on SELECT *: SQL SERVER – Solution – Puzzle – SELECT * vs SELECT COUNT(*) SQL SERVER – Puzzle – SELECT * vs SELECT COUNT(*) SQL SERVER – SELECT vs. SET Performance Comparison I encourage you to submit your ideas for SQL in Sixty Seconds. We will try to accommodate as many as we can. If we like your idea we promise to share with you educational material. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Database, Pinal Dave, PostADay, SQL, SQL Authority, SQL in Sixty Seconds, SQL Query, SQL Scripts, SQL Server, SQL Server Management Studio, SQL Tips and Tricks, T SQL, Technology, Video

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  • We’ve Got 10 Free Copies of Microsoft’s Networking Windows 7 eBook to Give Away. Get Yours!

    - by The Geek
    Last month, we reviewed our friend Ciprian’s new book by Microsoft Press, Network Your Computers & Devices: Step by Step—and we’ve twisted his arm until he decided to give away 10 free copies for our readers. First, the book: It’s a great book that covers networking between computers running Windows 7, XP, Vista, Linux, and even Mac OS X. Just as the title suggests, he’s got step-by-step tutorials that explain how to get your network up and running with a minimum of fuss. Want to see for yourself? You can grab a copy of the free sample chapter if you’d like, or you can look through the chapter outline: Chapter 1: Setting Up a Router and Devices Chapter 2: Setting User Accounts on All Computers Chapter 3: Setting Up Your Libraries on All Windows 7 Computers Chapter 4: Creating the Network Chapter 5: Customizing Network Sharing Settings in Windows 7 Chapter 6: Creating the Homegroup and Joining Windows 7 Computers Chapter 7: Sharing Libraries and Folders Chapter 8: Sharing and Working with Devices Chapter 9: Streaming Media Over the Network and the Internet Chapter 10: Sharing Between Windows XP, Windows Vista, and Windows 7 Computers Chapter 11: Sharing Between Mac OS X and Windows 7 Computers Chapter 12: Sharing Between Ubuntu Linux and Windows 7 Computers Chapter 13: Keeping the Network Secure Chapter 14: Setting Up Parental Controls Chapter 15: Troubleshooting Network and Internet Problems Whether you believe it’s the perfect book or not, we’re giving away one for free, so keep reading. Giveaway Details: Or What You Need to Do Since we’ve got an awful lot of subscribers, and we’ve only got 10 ebooks to give away, we need a few rules. So here’s how you can put your name into the hat for the giveaway: Method 1: Leave a comment on the giveaway post over on our Facebook Fan page. Obviously you’ll need to Like us before you can leave a comment. Method 2: If you don’t use Facebook, you can tweet this post using the Tweet button at the top of the article. Winners: We’ll randomly pick 10 winners from those who participate. Expiration: This giveaway expires in 3 days, give or take a day. We’ll announce the winners and contact them directly. So go forth, and get yourself a free ebook! Of course, if you want the print version, you can get that for a discount over on Amazon at the moment. Latest Features How-To Geek ETC Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware How to Change the Default Application for Android Tasks Stop Believing TV’s Lies: The Real Truth About "Enhancing" Images The How-To Geek Valentine’s Day Gift Guide Inspire Geek Love with These Hilarious Geek Valentines MyPaint is an Open-Source Graphics App for Digital Painters Can the Birds and Pigs Really Be Friends in the End? [Angry Birds Video] Add the 2D Version of the New Unity Interface to Ubuntu 10.10 and 11.04 MightyMintyBoost Is a 3-in-1 Gadget Charger Watson Ties Against Human Jeopardy Opponents Peaceful Tropical Cavern Wallpaper

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  • How can I determine what codec is being used?

    - by pwnguin
    This forum comment and this superuser answer suggest that the audio compression contributes to loss of quality. I've noticed that music played over my BT setup sometimes pitch bends in ways I don't remember the original doing, and I'm wondering if SBC has something to do with it. I'm using Ubuntu 10.10 on a Mac Pro, connecting to a pair of Sony DR-BT50's. Is there a way to inspect which Bluetooth codec pulseaudio is using, what codecs both ends of the bluetooth link support?

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  • SQL SERVER – Monday Morning Puzzle – Query Returns Results Sometimes but Not Always

    - by pinaldave
    The amount of email I receive sometime it is impossible for me to answer every email. Nonetheless I try to answer pretty much every email I receive. However, quite often I receive such questions in email that I have no answer to them because either emails are not complete or they are out of my domain expertise. In recent times I received one email which had only one or two lines but indeed attracted my attention to it. The question was bit vague but it indeed made me think. The answer was not straightforward so I had to keep on writing the answer as I remember it. However, after writing the answer I do not feel satisfied. Let me put this question in front of you and see if we all can come up with a comprehensive answer. Question: I am beginner with SQL Server. I have one query, it sometime returns a result and sometime it does not return me the result. Where should I start looking for a solution and what kind of information I should send to you so you can help me with solving. I have no clue, please guide me. Well, if you read the question, it is indeed incomplete and it does not contain much of the information at all. I decided to help him and here is the answer, which I started to compose. Answer: As there are not much information in the original question, I am not confident what will solve your problem. However, here are the few things which you can try to look at and see if that solves your problem. Check parameter which is passed to the query. Is the parameter changing at various executions? Check connection string – is there some kind of logic around it? Do you have a non-deterministic component in your query logic? (In other words – does your result is based on current date time or any other time based function?) Are you facing time out while running your query? Is there any error in error log? What is the business logic in your query? Do you have all the valid permissions to all the objects used in the query? Are permissions changing or query accessing a different object in various executions? (Add your suggestions here) Meanwhile, have you ever faced this situation? If yes, do share your experience in the comment area. I will send a copy of my book SQL Server Interview Questions and Answers to one of the most interesting comment. The winner will be announced by next Monday.  Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Interview Questions and Answers, SQL Puzzle, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • SQL SERVER – Three Puzzling Questions – Need Your Answer

    - by pinaldave
    Last week I had asked three questions on my blog. I got very good response to the questions. I am planning to write summary post for each of three questions next week. Before I write summary post and give credit to all the valid answers. I was wondering if I can bring to notice of all of you this week. Why SELECT * throws an error but SELECT COUNT(*) does not This is indeed very interesting question as not quite many realize that this kind of behavior SQL Server demonstrates out of the box. Once you run both the code and read the explanation it totally makes sense why SQL Server is behaving how it is behaving. Also there is connect item is associated with it. Also read the very first comment by Rob Farley it also shares very interesting detail. Statistics are not Updated but are Created Once This puzzle has multiple right answer. I am glad to see many of the correct answer as a comment to this blog post. Statistics are very important and it really helps SQL Server Engine to come up with optimal execution plan. DBA quite often ignore statistics thinking it does not need to be updated, as they are automatically maintained if proper database setting is configured (auto update and auto create). Well, in this question, we have scenario even though auto create and auto update statistics are ON, statistics is not updated. There are multiple solutions but what will be your solution in this case? When to use Function and When to use Stored Procedure This question is rather open ended question – there is no right or wrong answer. Everybody developer has always used functions and stored procedures. Here is the chance to justify when to use Stored Procedure and when to use Functions. I want to acknowledge that they can be used interchangeably but there are few reasons when one should not do that. There are few reasons when one is better than other. Let us discuss this here. Your opinion matters. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, Readers Contribution, Readers Question, SQL, SQL Authority, SQL Performance, SQL Puzzle, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, SQLAuthority News, SQLServer, T SQL, Technology

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  • Programme d'étude sur le C++ bas niveau, un article d'Alex Darby traduit par Bousk

    Nouvelle série d'articles annoncée dans Le programme de rentrée de la rubrique C++. L'objectif de cette série d'article d'Alex Darby sur la programmation "bas-niveau" est de permettre aux développeurs ayant déjà des connaissances de la programmation C++ de mieux comprendre comme vos programmes sont exécutés en pratique. Ce premier article explique l'importance de connaître le fonctionnement bas-niveau et comment récupérer le code assembleur généré par le compilateur et l'interpréter. Programme d'étude sur le C++ bas niveau

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  • Créez un bouton animé dans un formulaire Access, par Jean-Philippe Ambrosino

    Bonjour, Je vous propose ce nouvel article qui a pour but de vous montrer comment créer un bouton animé en fonction d'un contexte particulier en amont et faisant apparaître une liste d'enregistrements à sélectionner pour continuer... Créer un bouton animé pour la sélection d'enregistrements dans un formulaire Access Toutes critiques ou suggestions d'amélioration sont bienvenues. Je vous souhaite une bonne lecture. Argy...

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  • Utilisez WCF Data Services 1.5 avec Silverlight, par Benjamin Roux

    Citation: Cet article vous présentera comment utiliser Silverlight et WCF Data Services 1.5. Premièrement, pourquoi utiliser Data Services 1.5 ? Tout simplement parce que l'intégration avec Silverlight est grandement améliorée (INotifyPropertyChanged et ObservableCollection, Two-way binding.). c'est par ici N'hésitez pas à laisser vos commentaires ici même

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  • My Body Summary template for Orchard

    - by Bertrand Le Roy
    By default, when Orchard displays a content item such as a blog post in a list, it uses a very basic summary template that removes all markup and then extracts the first 200 characters. Removing the markup has the unfortunate effect of removing all styles and images, in particular the image I like to add to the beginning of my posts. Fortunately, overriding templates in Orchard is a piece of cake. Here is the Common.Body.Summary.cshtml file that I drop into the Views/Parts folder of pretty much all Orchard themes I build: @{ Orchard.ContentManagement.ContentItem contentItem = Model.ContentPart.ContentItem; var bodyHtml = Model.Html.ToString(); var more = bodyHtml.IndexOf("<!--more-->"); if (more != -1) { bodyHtml = bodyHtml.Substring(0, more); } else { var firstP = bodyHtml.IndexOf("<p>"); var firstSlashP = bodyHtml.IndexOf("</p>"); if (firstP >=0 && firstSlashP > firstP) { bodyHtml = bodyHtml.Substring(firstP, firstSlashP + 4 - firstP); } } var body = new HtmlString(bodyHtml); } <p>@body</p> <p>@Html.ItemDisplayLink(T("Read more...").ToString(), contentItem)</p> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } This template does not remove any tags, but instead looks for an HTML comment delimiting the end of the post’s intro: <!--more--> This is the same convention that is being used in WordPress, and it’s easy to add from the source view in TinyMCE or Live Writer. If such a comment is not found, the template will extract the first paragraph (delimited by <p> and </p> tags) as the summary. And if it finds neither, it will use the whole post. The template also adds a localizable link to the full post.

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  • Android : développer en Pascal est désormais possible grâce au compilateur open-source Free Pascal

    Android : Développer en Pascal Est désormais possible grâce au compilateur open-source Free Pascal Depuis la version 2.3 d'Android, il est possible de produire du code Android natif sans avoir à écrire une seule ligne de code en Java. Avec le compilateur Free Pascal, un outil open-source et gratuit, il est donc désormais possible de développer pour l'OS mobile de Google en Pascal. Free Pascal est disponible avec une documentation très complète expliquant pas à pas comment l'utiliser. Tél...

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  • SQL SERVER – NTFS File System Performance for SQL Server

    - by pinaldave
    Note: Before practicing any of the suggestion of this article, consult your IT Infrastructural Admin, applying the suggestion without proper testing can only damage your system. Question: “Pinal, we have 80 GB of data including all the database files, we have our data in NTFS file system. We have proper backups are set up. Any suggestion for our NTFS file system performance improvement. Our SQL Server box is running only SQL Server and nothing else. Please advise.” When I receive questions which I have just listed above, it often sends me deep thought. Honestly, I know a lot but there are plenty of things, I believe can be built with community knowledge base. Today I need you to help me to complete this list. I will start the list and you help me complete it. NTFS File System Performance Best Practices for SQL Server Disable Indexing on disk volumes Disable generation of 8.3 names (command: FSUTIL BEHAVIOR SET DISABLE8DOT3 1) Disable last file access time tracking (command: FSUTIL BEHAVIOR SET DISABLELASTACCESS 1) Keep some space empty (let us say 15% for reference) on drive is possible (Only on Filestream Data storage volume) Defragement the volume Add your suggestions here… The one which I often get a pretty big debate is NTFS allocation size. I have seen that on the disk volume which stores filestream data, when increased allocation to 64K from 4K, it reduces the fragmentation. Again, I suggest you attempt this after proper testing on your server. Every system is different and the file stored is different. Here is when I would like to request you to share your experience with related to NTFS allocation size. If you do not agree with any of the above suggestions, leave a comment with reference and I will modify it. Please note that above list prepared assuming the SQL Server application is only running on the computer system. The next question does all these still relevant for SSD – I personally have no experience with SSD with large database so I will refrain from comment. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Performance, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Tester la performance de votre réseau avec Iperf, un tutoriel par Nicolas Hennion

    Bonjour à tous !La rubrique Réseaux vous propose un article expliquant comment tester les performances du réseau avec Iperf par nicolargo : Tester la performance de votre réseau avec Iperf. Citation: Iperf est un des outils indispensables pour tout administrateur réseau qui se respecte. En effet, ce logiciel de mesure de performance réseau, disponible sur de nombreuses plateformes (Linux, BSD, Mac, Windows?) se présente sous la forme d'une ligne de commande à exécuter sur deux machines...

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  • I need books for procedural programming

    - by Student
    Please suggest books for procedural programming. I need to know the core principles/patterns of procedural programming. So it doesn't matter if the book using any language to convey the procedural programming principles, be it pure C or others languages. Nowadays it is difficult to find ones. Even google and amazon searches didn't give me a satisfactory books. You may vote to close this question but please recommend books in comment section.

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  • Compilation détaillée de PHP sous Linux, par Julien Pauli : créez un de PHP adapté à vos besoin

    PHP est écrit en C, et à ce titre il est compilable en langage machine. Nous allons détailler comment fonctionne ce processus sous Linux, ainsi qu'une partie de l'éco-système de PHP : ses extensions, les bibliothèques utilisées, son moteur... Pour suivre cet article, vous devez connaitre le langage PHP et avoir quelques notions d'UNIX, c'est tout. Nous effleurerons également quelques concepts relatifs au langage C, sans rentrer dans les détails. La version de PHP considérée est 5.3.x.

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  • SQL SERVER – Simple Explanation and Puzzle with SOUNDEX Function and DIFFERENCE Function

    - by pinaldave
    Earlier this week I asked a question where I asked how to Swap Values of the column without using CASE Statement. Read here: A Puzzle – Swap Value of Column Without Case Statement,there were more than 50 solutions proposed in the comment. There were many creative solutions. I have mentioned my personal favorite (different ones) here: Solution of Puzzle – Swap Value of Column Without Case Statement. However, I received lots of questions regarding one of the Solution by SIJIN KUMAR V P. He has used the function SOUNDEX in his solution. The request was to explain how SOUNDEX and DIFFERENCE works. Well, there are pretty decent documentations provided over here SOUNDEX function and DIFFERENCE over on MSDN and if I attempt to explain this function I will end up writing the same details which are available on MSDN. Instead of writing theory, we will try to learn this function by using a couple of simple puzzles. You try to solve the puzzles using the MSDN and see if you can learn something very quickly. In simple words - SOUNDEX converts an alphanumeric string to a four-character code to find similar-sounding words or names. The first character of the code is the first character of character_expression and the second through fourth characters of the code are numbers that represent the letters in the expression. Vowels incharacter_expression are ignored unless they are the first letter of the string. DIFFERENCE function returns an integer value. The  integer returned is the number of characters in the SOUNDEX values that are the same. The return value ranges from 0 through 4: 0 indicates weak or no similarity, and 4 indicates strong similarity or the same values. Learning Puzzle 1: Now let us run following four queries and observe its output. SELECT SOUNDEX('SQLAuthority') SdxValue SELECT SOUNDEX('SLTR') SdxValue SELECT SOUNDEX('SaLaTaRa') SdxValue SELECT SOUNDEX('SaLaTaRaM') SdxValue When you look at the result set all the four values are same. The reason for all the values to be same is as for SQL Server SOUNDEX function all the four strings are similarly sounding string. Learning Puzzle 2: Now let us run following five queries and observe its output. SELECT DIFFERENCE (SOUNDEX('SLTR'),SOUNDEX('SQLAuthority')) SELECT DIFFERENCE (SOUNDEX('TH'),SOUNDEX('SQLAuthority')) SELECT DIFFERENCE ('SQLAuthority',SOUNDEX('SQLAuthority')) SELECT DIFFERENCE ('SLTR',SOUNDEX('SQLAuthority')) SELECT DIFFERENCE ('SLTR','SQLAuthority') When you look at the result set you will get the result in the ranges from 1 to 4. Here is how it works if your result is 0 which means absolutely not relevant to each other and if your result is 1 which means the results are relevant to each other. Have you ever used above two functions in your business need or on production server? If yes, would you please leave a comment with use cases. I believe it will be beneficial to everyone. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Puzzle, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Tutoriel Java Web : Développer des Web Services étendus avec JAX-WS en Java, par Mickael Baron

    Une présentation générale de la spécification JAX-WS est donnée en première partie. Le développement de web services côté serveur est ensuite abordé via deux points de vue (approche montante et approche descendante). Il est suivi d'une partie expliquant comment utiliser JAX-WS dans un client pour appeler un web service étendu. Les parties suivantes s'intéressent à décrire les annotations, le mécanisme d'intercepteur (handler) et l'utilisation de JAX-WS via Java SE 6 et via les EJBs.

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