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  • Les conditions de travail chez Foxconn toujours aussi mauvaises d'après une ONG, un concurrent d'Apple pourrait en profiter

    Les conditions de travail chez Foxconn seraient toujours aussi mauvaises D'après le China Labour Bulletin, la polémique autour du fournisseur d'Apple peut-elle affecter la marque ? Le sous-traitant informatique Foxconn continue de faire parler de lui. Ce géant taïwanais, qui emploie plus de 1.2 millions de collaborateurs, assemble les produits de grands noms de l'électronique à l'instar de Apple, HP, Nintendo, Sony, Microsoft ou encore Amazon. Une vague de suicides à répétition avait placé Foxconn sous le feu des projecteurs en 2010 et 3 employés ont trouvé la mort en juin dernier dans une explosion à l'usine de Chengdu. Foxconn a vu sa réputation s'écrouler aux Etats-Unis ...

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  • Le Windows Store franchit le cap des 100 000 applications, la galerie double de volume en trois mois

    Le Windows Store franchit le cap des 100 000 applications la galerie double de volume en trois moisLe Windows Store vient de franchir le cap historique des 100 000 applications, d'après un message de Microsoft sur l'un de ses comptes Twitter.La galerie d'applications pour Windows 8 atteint ce chiffre record en un peu plus de huit mois depuis le lancement de l'OS en octobre dernier. Le Windows Store s'est enrichi d'environ 50 000 applications en pratiquement trois mois. Comparé à d'autres galeries, le Windows Store affiche la plus grosse progression. Le Store Windows Phone a franchi le cap...

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  • Denormalization Strategies

    In building a database, typically we want a well normalized design. However there are cases for considering options for denormalization in complex systems. Timothy Claason gives you some thoughts on the subject.

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  • PowerPivot, Stocks Exchange and the Moving Average

    - by AlbertoFerrari
    In this post I want to analyze a data model that perform some basic computations over stocks and uses one of the most commonly needed formula there (and in many other business scenarios): a moving average over a specified period in time. Moving averages can be very easily modeled in PowerPivot, but there is the need for some care and, in this post, I try to provide a solid background on how to compute moving averages. In general, a moving average over period T1..T2 is the average of all the values...(read more)

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  • How are Reads Distributed in a Workload

    - by Bill Graziano
    People have uploaded nearly one millions rows of trace data to TraceTune.  That’s enough data to start to look at the results in aggregate.  The first thing I want to look at is logical reads.  This is the easiest metric to identify and fix. When you upload a trace, I rank each statement based on the total number of logical reads.  I also calculate each statement’s percentage of the total logical reads.  I do the same thing for CPU, duration and logical writes.  When you view a statement you can see all the details like this: This single statement consumed 61.4% of the total logical reads on the system while we were tracing it.  I also wanted to see the distribution of reads across statements.  That graph looks like this: On average, the highest ranked statement consumed just under 50% of the reads on the system.  When I tune a system, I’m usually starting in one of two modes: this “piece” is slow or the whole system is slow.  If a given piece (screen, report, query, etc.) is slow you can usually find the specific statements behind it and tune it.  You can make that individual piece faster but you may not affect the whole system. When you’re trying to speed up an entire server you need to identity those queries that are using the most disk resources in aggregate.  Fixing those will make them faster and it will leave more disk throughput for the rest of the queries. Here are some of the things I’ve learned querying this data: The highest ranked query averages just under 50% of the total reads on the system. The top 3 ranked queries average 73% of the total reads on the system. The top 10 ranked queries average 91% of the total reads on the system. Remember these are averages across all the traces that have been uploaded.  And I’m guessing that people mainly upload traces where there are performance problems so your mileage may vary. I also learned that slow queries aren’t the problem.  Before I wrote ClearTrace I used to identify queries by filtering on high logical reads using Profiler.  That picked out individual queries but those rarely ran often enough to put a large load on the system. If you look at the execution count by rank you’d see that the highest ranked queries also have the highest execution counts.  The graph would look very similar to the one above but flatter.  These queries don’t look that bad individually but run so often that they hog the disk capacity. The take away from all this is that you really should be tuning the top 10 queries if you want to make your system faster.  Tuning individually slow queries will help those specific queries but won’t have much impact on the system as a whole.

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  • Analysing Indexes - reducing scans.

    - by GrumpyOldDBA
    The whole subject of database/application tuning is sometimes akin to a black art, it's pretty easy to find your worst 20 whatever but actually seeking to reduce operational overhead can be slightly more tricky. If you ever read through my analysing indexes post you'll know I have a number of ways of seeking out ways to tune the database. -- This is a slightly different slant on one of those which produced an interesting side effect. -- We all know that except for very small tables avoiding...(read more)

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  • SSRS 2008 R2 KPIs with bullet graphs

    Key Performance Indicators are typically displayed in a scorecard with stop light indicators, which are either red, amber or green light icons. The limitation for these kind of indicators is that you can see the actual and target values in two different fields as well as see the status of the KPI in red, amber or green color. If the user wants to figure out the thresholds associated with the KPI, these values are generally not visible. Further, representing the threshold values in the scorecard itself defeats the purpose of the scorecard. The scorecard should display the KPI's status in the most summarized form and use a minimal amount of space on the dashboard. In this tip we would look at how to address this issue.

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  • How to get Visual Studio 2010 Express Edition on Windows 7

    - by thanigai
    Visual studio 2010 is an amzing release from Microsoft. I have tried the beta 1,2 of Visual Studio 2010 and finally the full version is released. I am also interested in the latest edition of Windows which nothing but our Windows 7. Next to Vista I like this version very much. Out of curiosity I have installed the prebuild version of Windows 7. I tried installing the express edition here and it failed making me disappointed. I tried two or three times and finally I decided to download the trial version of Windows 7. After that I can install the Visual Studio 2010 express edition easily. I have given the link below from where I have downloaded the file. http://www.microsoft.com/express/downloads/ Here the link give is through Web PI Installer. Other option is you can download the ISO image file and burn them to a disc or use a virtual disc This Visual Web developer will provide the Sql Server engine alone. To get a Sql Server Management Studio get from the following link http://www.microsoft.com/express/Database/InstallOptions.aspx That's it all the things necessary for the web application programming is ready. Ah I forget to tell about the Silverlight. Please find the Silverlight 4 latest tools from the below link (WCF RIA services is the main update) http://www.silverlight.net/getstarted/ Silverlight 4 Tools(http://www.microsoft.com/downloads/details.aspx?FamilyID=eff8a0da-0a4d-48e8-8366-6ddf2ecad801&displaylang=en) Expression Blend 4 trial(http://www.microsoft.com/downloads/details.aspx?FamilyID=88484825-1b3c-4e8c-8b14-b05d025e1541&displaylang=en) I think the reader would have enjoyed on how to get these things. Please let me know if you are not clear with any of these things.  Thanks, Thani

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  • SSIS - Range lookups

    - by Repieter
      When developing an ETL solution in SSIS we sometimes need to do range lookups in SSIS. Several solutions for this can be found on the internet, but now we have built another solution which I would like to share, since it's pretty easy to implement and the performance is fast.   You can download the sample package to see how it works. Make sure you have the AdventureWorks2008R2 and AdventureWorksDW2008R2 databases installed. (Apologies for the layout of this blog, I don't do this too often :))   To give a little bit more information about the example, this is basically what is does: we load a facttable and do an SCD type 2 lookup operation of the Product dimension. This is done with a script component.   First we query the Data warehouse to create the lookup dataset. The query that is used for that is:   SELECT     [ProductKey]     ,[ProductAlternateKey]     ,[StartDate]     ,ISNULL([EndDate], '9999-01-01') AS EndDate FROM [DimProduct]     The output of this query is stored in a DataTable:     string lookupQuery = @"                         SELECT                             [ProductKey]                             ,[ProductAlternateKey]                             ,[StartDate]                             ,ISNULL([EndDate], '9999-01-01') AS EndDate                         FROM [DimProduct]";           OleDbCommand oleDbCommand = new OleDbCommand(lookupQuery, _oleDbConnection);         OleDbDataAdapter adapter = new OleDbDataAdapter(oleDbCommand);           _dataTable = new DataTable();         adapter.Fill(_dataTable);     Now that the dimension data is stored in the DataTable we use the following method to do the actual lookup:   public int RangeLookup(string businessKey, DateTime lookupDate)     {         // set default return value (Unknown)         int result = -1;           DataRow[] filteredRows;         filteredRows = _dataTable.Select(string.Format("ProductAlternateKey = '{0}'", businessKey));           for (int i = 0; i < filteredRows.Length; i++)         {             // check if the lookupdate is found between the startdate and enddate of any of the records             if (lookupDate >= (DateTime)filteredRows[i][2] && lookupDate < (DateTime)filteredRows[i][3])             {                 result = (filteredRows[i][0] == null) ? -1 : (int)filteredRows[i][0];                 break;             }         }           filteredRows = null;           return result;     }       This method is executed for every row that passes the script component. This is implemented in the ProcessInputRow method   public override void Input0_ProcessInputRow(Input0Buffer Row)     {         // Perform the lookup operation on the current row and put the value in the Surrogate Key Attribute         Row.ProductKey = RangeLookup(Row.ProductNumber, Row.OrderDate);     }   Now what actually happens?!   1. Every record passes the business key and the orderdate to the RangeLookup method. 2. The DataTable is then filtered on the business key of the current record. The output is stored in a DataRow [] object. 3. We loop over the DataRow[] object to see where the orderdate meets the following expression: (lookupDate >= (DateTime)filteredRows[i][2] && lookupDate < (DateTime)filteredRows[i][3]) 4. When the expression returns true (so where the data is between the Startdate and the EndDate), the surrogate key of the dimension record is returned   We have done some testing with this solution and it works great for us. Hope others can use this example to do their range lookups.

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  • Excel 2013 Data Explorer and GeoFlow make 3-D maps quick and easy

    - by John Paul Cook
    Excel add-ins Data Explorer and GeoFlow work well together, mainly because they just work. Simple, fast, and powerful. I started Excel 2013, used Data Explorer to search for, examine, and then download latitude-longitude data and finally used GeoFlow to plot an interactive 3-D visualization. I didn’t use any fancy Excel commands and the entire process took less than 3 minutes. You can download the GeoFlow preview from here . It can also be used with Office 365. Start by clicking the DATA EXPLORER...(read more)

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  • Microsoft continuera à soutenir Windows Mobile 6.5 et le fera cohabiter avec Windows Phone 7, notamm

    Mise à jour du 25/03/10 Microsoft continuera à soutenir Windows Mobile 6.5 Malgré l'arrivée de Windows Phone 7, principalement pour rassurer les entreprises Microsoft avait sorti un SDK pour Windows Mobile 6.5 en janvier (lire ci-avant). Puis dans la foulée, en février, il avait annoncé l'arrivée de Windows Phone 7 (ex-Windows Mobile 7). Problème, ce futur OS ne permet pas d'écrire des applications rétro-compatibles. Face à ces signes contradictoires, la question commençait donc à se poser avec insistance : WinMob 6.5 allait-il être abandonné ? Cette question est d'autant plus cruciale pour Microsoft que ...

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  • Firefox va intégrer Weave en natif pour proposer la synchronisation cryptée et anonyme par défaut :

    Mise à jour du 25/05/10 Firefox va intégrer Weave en natif Pour proposer la synchronisation cryptée et anonyme par défaut Weave est le premier « service Mozilla ». Il s'agit en fait d'une extension qui permet de synchroniser les données de Firefox ? comme les marques-pages, les mots de passe, etc (lire ci-avant) - entre plusieurs machines. La Fondation Mozilla vient de décider d'inclure ce service en natif dans son navigateur. Rien de nouveau sous le soleil par rapport à la concurrence ? Oui et non. Non, parce qu'il est vrai que certaines des concurrents de Firefox le proposent déjà. ...

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  • L'authentification forte par Token compromise ? Victime d'une cyber-attaque, RSA se fait dérober des informations sur sa technologie

    L'authentification forte par Token compromise ? La société RSA victime d'une cyber-attaque se fait dérober des informations sur sa technologie La société RSA est bien connue dans le monde de la sécurité d'entreprise. Elle fournit les fameux « Token », ces petits récepteurs qui permettent une authentification forte. [IMG]http://ftp-developpez.com/gordon-fowler/Token.gif[/IMG] Le principe est simple. Une identification « classique » repose sur un identifiant et un mot de passe. Une authentification forte repose, en plus, sur un numéro changeant en permanence (au moins une fois par minute). Ce numéro est envoyé en continue sur ...

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  • Parameterize Charts using Excel Slicers in PowerPivot

    - by Marco Russo (SQLBI)
    One new nice feature of Excel 2010 is the Slicer. Usually, slicers are used to filter data in a PivotTable. But they might be also useful to parameterize an algorithm or a chart! We discussed this technique in our book , but Alberto Ferrari wrote a post that shows how to use this technique to allow the user to select two stocks that should be compared in an Excel Chart – as you might imagine, this will work also when you will publish the workbook on SharePoint! This is the result: Nice to see that...(read more)

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  • Windows Server 2003 network boogey men every DBA should know

    - by merrillaldrich
    Recently I was again visited by my old friends TCP Chimney and SynAttackProtect . (Yeah, sometimes I feel like I mostly blog about 5-year old problems, but many of us as DBA's have to work on older versions or older systems, and so repeat older problems :-). This has been written about before, but as I BinGoogled around I noticed you are more likely to find the documents if you search for the cause, and not the symptoms. Most people who face a problem, of course, know the symptoms but not the cause....(read more)

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  • Creating a Corporate Data Hub

    - by BuckWoody
    The Windows Azure Marketplace has a rich assortment of data and software offerings for you to use – a type of Software as a Service (SaaS) for IT workers, not necessarily for end-users. Among those offerings is the “Data Hub” – a  codename for a project that ironically actually does what the codename says. In many of our organizations, we have multiple data quality issues. Finding data is one problem, but finding it just once is often a bigger problem. Lots of departments and even individuals have stored the same data more than once, and in some cases, made changes to one of the copies. It’s difficult to know which location or version of the data is authoritative. Then there’s the problem of accessing the data. It’s fairly straightforward to publish a database, share or other location internally to store the data. But then you have to figure out who owns it, how it is controlled, and pass out the various connection strings to those who want to use it. And then you need to figure out how to let folks access the internal data externally – bringing up all kinds of security issues. Finally, in many cases our user community wants us to combine data from the internally sources with external data, bringing up the security, strings, and exploration features up all over again. Enter the Data Hub. This is an online offering, where you assign an administrator and data stewards. You import the data into the service, and it’s available to you - and only you and your organization if you wish. The basic steps for this service are to set up the portal for your company, assign administrators and permissions, and then you assign data areas and import data into them. From there you make them discoverable, and then you have multiple options that you or your users can access that data. You’re then able, if you wish, to combine that data with other data in one location. So how does all that work? What about security? Is it really that easy? And can you really move the data definition off to the Subject Matter Experts (SME’s) that know the particular data stack better than the IT team does? Well, nothing good is easy – but using the Data Hub is actually pretty simple. I’ll give you a link in a moment where you can sign up and try this yourself. Once you sign up, you assign an administrator. From there you’ll create data areas, and then use a simple interface to bring the data in. All of this is done in a portal interface – nothing to install, configure, update or manage. After the data is entered in, and you’ve assigned meta-data to describe it, your users have multiple options to access it. They can simply use the portal – which actually has powerful visualizations you can use on any platform, even mobile phones or tablets.     Your users can also hit the data with Excel – which gives them ultimate flexibility for display, all while using an authoritative, single reference for the data. Since the service is online, they can do this wherever they are – given the proper authentication and permissions. You can also hit the service with simple API calls, like this one from C#: http://msdn.microsoft.com/en-us/library/hh921924  You can make HTTP calls instead of code, and the data can even be exposed as an OData Feed. As you can see, there are a lot of options. You can check out the offering here: http://www.microsoft.com/en-us/sqlazurelabs/labs/data-hub.aspx and you can read the documentation here: http://msdn.microsoft.com/en-us/library/hh921938

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  • Les travailleurs IT de plus de 55 ans connaissent le plus gros taux de chômage, pourquoi les entreprises rechignent-elles à les embaucher ?

    Les travailleurs IT de plus de 55 ans connaissent le plus gros taux de chômage, pourquoi les entreprises rechignent à embaucher les anciens ? Le recrutement pour les personnes de plus de 55 ans dans le domaine de l'IT semble être un problème, d'après une étude américaine. Le taux de chômages pour ces tranches d'âge ne cesse d'augmenter depuis deux ans (il est aujourd'hui, aux USA, de 8% pour les hommes, et 9.4% pour les femmes - et de 4.5% tous secteurs confondus-). Pourtant, dans le même temps, plus de postes sont offerts aux 25-54 ans. Nanci Schimizzi, présidente de Women in Technology, dit à ce sujet que les femmes de plus de 50 ans "reste sans emploi pendant de longues périodes, parfois pendan...

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  • Education and Career Resources from Microsoft and the Community

    - by KKline
    Sometimes I'm timely in getting the news out on useful resources. And, other times, I'm a bit slower on the draw. As I told my friends back at New Year's Day, "As an official member of the Procrastinators Club, welcome to 2008!" On the other hand, it's always good to remind folks of great resources that are still available and on the shelf. Why? Well, the Internet hits us with such a deluge of constantly new material, that we often forget about the old(ish) stuff that's still really useful. Darth...(read more)

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  • Ubuntu 11.10 sera baptisé "Oneiric Ocelot", son développement a officiellement démarré

    Ubuntu 11.10 sera baptisé "Oneiric Ocelot" Son développement a officiellement démarré Les travaux sur la prochaine version de la distribution Linux Ubuntu ont officiellement démarré d'après le fondateur du projet, Mark Shuttleworth. Alors qu'Ubuntu 11.4, baptisé « Natty Narwhal», est encore en cours de peaufinage (publication officielle prévue pour le 28 avril), la communauté des développeurs d'Ubuntu se penche déjà sur son successeur. Mark Shuttleworth a également le nom de code de la version 11.10 « 11.10 marquera le huitième anniversaire de la naissance d'Ubuntu [...] ce que nous voulions c'est quelque chose d'imaginatif, quelque chose qui fasse rêver, quelque chose...

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  • Wophone : le nouvel OS mobile chinois qui veut concurrencer Android et iOS

    Wophone : le nouvel OS mobile chinois Pour concurrencer Android et l'iPhone China Unicom, l'un des trois plus gros opérateurs de téléphonie sans fil de Chine, a annoncé qu'il envisageait de lancer de nouveaux terminaux mobile équipé de son propre système d'exploitation maison baptisé « Woppone». La plate-forme, en cours de développement, est basée sur Linux. Elle pourra tourner sur les Smartphones et sur les tablettes. Le but d'un tel OS est de permettre à China Unicom, d'après sa propre communication, de démocratiser sa jeune génération de réseau sans fil 3G. Grâce à ce nouvel OS, China Unicom espère développer des appareils sans fil 3G plus rapide et réduire le temps néc...

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  • Google Apps for Business gratuit : c'est fini, même pour les entreprises de moins de dix utilisateurs

    Google Apps for Business gratuit c'est fini Même pour les entreprises de moins de 10 postes Voilà une nouvelle qui risque de ne pas faire plaisir aux TPE/PME. La version gratuite des Google Apps for Business pour les entreprises de moins de 10 utilisateurs a vécu. Désormais, ces sociétés devront s'acquitter de 40 € par poste et par an pour utiliser la suite bureautique 100% Web de Google. A noter cependant, ce changement ne concerne pas les clients actuels mais seulement les nouvelles souscriptions. [IMG]http://ftp-developpez.com/gordon-fowler/Google%20Apps%20FB%20gratuites%20finies.png[/IMG] Plus aucune version gratuite ...

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  • Many-to-many relationships in pharmacology

    - by John Paul Cook
    When I was in my pharmacology class this morning, I realized that the instructor was presenting a classic relational database management system problem: the many-to-many relationship. He said that all of us in nursing school must know our drugs backwards and forwards. I know how to model that! There are so many things in both healthcare and higher education that could benefit from an appropriate application of technology. As a student, I'd like to be able to start with a drug, a disease, a name of...(read more)

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  • BI Evening @ Hitachi Consulting

    - by tsutha
    Next BI Evening is hosted by Hitachi Consulting. Please register ASAP as there are only limited number of spaces available. Of course there will be free beer and pizza. Great place to network with industry experts. If you are looking for job don't feel shy to talk to us . ThanksSutha

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  • Cell Transitions in Excel 2013 Preview–Fixed

    - by simonsabin
    If you’ve downloaded Excel 2013 and been working with it you may have noticed the new cell transition feature. Not sure why they put it in, it feels a bit like the aero interface which I understand has been dropped in windows 8. What you may have found is that the transition is buggy, Excel hangs, of the transition is jumpy. Well I found the fix on http://answers.microsoft.com/en-us/office/forum/office_home-excel/hardware-acceleration-problem-with-excel-2013/894da202-48c0-4442-a371-955587c1b7c0 For...(read more)

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  • Hadopi : le code de ses logiciels sécuritaires sera totalement open-source, de quoi ouvrir la porte aux éditeurs

    Hadopi : le code de ses logiciels sécuritaires sera totalement open-source, de quoi ouvrir la porte aux éditeurs La Hadopi vient de donner sa première conférence de presse de 2011. Son secrétaire général, Eric Walter, y a fait une annonce importante à propos des "logiciels de sécurisation" que l'Etat demandera prochainement aux internautes d'installer sur leurs machines, professionnels comme particuliers. Ces programmes seront différentes pour les SI et les installations domestiques, et ce sont les utilisateurs qui en auront le contrôlé, via notamment trois "journalisations" (enregistrement de l'activité d'un ordinateur sur Internet) différentes : une absence (ne pas créer de journalisation), une en claire et un...

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