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  • HTTP 401 error in Windows Authentication disappears after swapping Providers

    - by Ray Cheng
    The IIS 7 on Windows 2008 R2 is acting really weird. We deploy our web apps as web sites with appcmd.exe. After they are deployed, if I browse to them, I'll get HTTP 401 errors. The web sites are only have Windows Authentication enabled and the providers are Negotiate and NTLM in such order. But if I swap the providers, the HTTP 401 error goes away. Even if I swap it back, the errors are still gone. So the order of the providers doesn't seem to matter, what matters is the swapping. It must have triggered something. Even if we delete the web site and application pool and reinstall the web sites, the errors are still gone. So far, we can't reproduce it easily since it happens randomly. Has anyone experienced this? How do I go about to troubleshoot it?

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  • Showplan Operator of the Week - Merge Interval

    When Fabiano agreed to undertake the epic task of describing each showplan operator, none of us quite predicted the interesting ways that the series helps to understand how the query optimizer works. With the Merge Interval, Fabiano comes up with some insights about the way that the Query optimizer handles overlapping ranges efficiently. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • How to Communicate Between SSBS Applications Across Instances

    Arshad Ali demonstrates how to verify the SQL Server Service Broker (SSBS) configuration when both the Initiator and Target are in different SQL Server instances, how to communicate between them and how to monitor the conversation. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • SQL Server DMVs in Action - Sample Chapter

    Read the first chapter of this new book on DMVs. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Row Oriented Security Using Triggers

    Handling security in an application can be a bit cumbersome. New author R Glen Cooper brings us a database design technique from the real world that can help you. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Google I/O 2010 - A JIT Compiler for Android's Dalvik VM

    Google I/O 2010 - A JIT Compiler for Android's Dalvik VM Google I/O 2010 - A JIT Compiler for Android's Dalvik VM Android 301 Ben Cheng, Bill Buzbee In this session we will outline the design of a JIT Compiler suitable for embedded Android devices. Topics will include an architectural overview, the rationale for design decisions and the special support for JIT verification, testing and tuning. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 3 0 ratings Time: 01:00:14 More in Science & Technology

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  • ShowPlan Operator of the Week - Merge Join

    Did you ever wonder how and why your indexes affect the performances of joins? Once you've read Fabiano Amorim's unforgettable explanation, you'll learn to love the MERGE operator, and plan your indexes so as to allow the Query Optimiser to use it. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Fun with SQL Server Profiler trace files and PowerShell

    Running Profiler traces against multiple servers becomes a painful process when it’s time to collate and filter all that data. It would be time-consuming, frustrating and messy if Laerte hadn’t written this handy PowerShell script (complete with examples) to help you out. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Troubleshoot Database Concurrency in SQL Server with sp_locks

    sp_locks is a useful tool which can help a DBA in detecting and troubleshooting blocking and concurrency scenarios. This article demonstrates a worked example of using sp_locks to troubleshoot a database concurrency issue. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Working with SQL Server Profiler Trace Files

    In a previous tip we looked at the steps to Create a Trace Template in Profiler. In this tip we will look at a few more tips such as creating a trace template from an existing trace file and saving a trace file to a SQL Server table. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • DevWeek & SQL Server DevCon 2011

    The 14th annual DevWeek conference takes place from 14-18 March 2011, at the Barbican Centre in central London, and once again incorporates two dedicated tracks on SQL Server, alongside seven concurrent tracks aimed at software developers. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Stairway to SQL Server Agent: Step 1: Setup and Overview

    SQL Server Agent is a Microsoft Windows service that allows a DBA to automate administrative tasks. SQL Server Agent can run jobs, monitor SQL Server, and process alerts. The SQL Server Agent service must be running before any jobs scheduled to execute automatically can be run Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • SEQUENCE in SQL Server 2011

    SEQUENCE is a core new feature of SQL Server 2011 (Denali). It is a more performant, flexible alternative to the INDENTITY attribute. This article introduces sequence and demonstrates how to use it and its performance advantage. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • Console output window in DLL

    - by user303907
    Hello, I am trying to redirect the output from my DLL to an external console window for easy debugging. I have been told about AllocConsole but I am not able to reproduce it, i.e. the console window does not appear. My current environment is Visual Studio 2005. I tried the following example which is gotten off the Internet, AllocConsole(); HANDLE han = GetStdHandle(STD_OUTPUT_HANDLE); WriteConsole(han,"hello",6,new DWORD,0); yet nothing happens. Can someone point me in the right direction if creating a console window via DLL is possible in the first place. Thanks in advance!

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  • ¿Oficina sin papeles?

    - by [email protected]
    Recientemente hemos organizado un evento de Digitalización para mostrar algunos de los últimos productos de Oracle en éste área.Siempre tendemos a pensar que en España estamos retrasados en estas tecnologías y que el mercado no está preparado para eliminar el papel. En algunos casos es cierto, pero también nos hemos llevado sorpresas con clientes extremadamente avanzados en la gestión electrónica del papel.Para los clientes que no tienen una solución corporativa ya desplegada, nuestra oferta de Imaging les parece completa e integrada, porque les permite digitalizar el papel en el punto más cercano a su recepción y posteriormente realizar todo el trámite interno de forma digital.Este proceso es el que se muestra en la siguiente imágen: Sobre todo en el entorno financiero los clientes ya tienen grandes infraestructuras desplegadas (algunos con funcionalidades muy sofisticadas que han desarrollado a medida durante estos últimos años).En estos casos, su interés está centrado en 2 capacidades clave de nuestros productos: La digitalización distribuidaEl OCR inteligenteCuando ya disponemos de una infraestructura de digitalización centralizada, tenemos varios puntos de mejora con los que conseguir mayores ratios de ahorro en la gestión del papel. Uno de ellos es digitalizar en origen, de forma que ahorraremos en logística de desplazamiento y almacenamiento de papel (reducimos valijas) y en velocidad de arranque de los procesos (desde el momento de la recepción).El hecho de poder hacer esto sólo con un explorador de internet es muy novedoso para los clientes.El no instalar ninguna pieza de software de cliente parece que es un requisito que muchos clientes estaban demandando desde hace tiempo. De hecho, estamos realizando demos en vivo con un escáner del cliente (solo necesitamos el driver de windows para ese escáner). El resultado es sorprendente porque mostramos cómo: escaneamos con sólo un explorador de internet; el documento escaneado, con sus metadatos, se incorporan al gestor documental; y se dispara su workflow de aprobación.Hacer esto en segundos es algo que genera mucho interés en los clientes de cara a acelerar la gestión de muchos de sus trámites en papel.Por último, lo más novedoso de la oferta es el OCR inteligente. Hay quien ya tiene absolutamente operativas sus infraestructuras de digitalización con todas estas capacidades, y buscan un paso más allá con el reconocimiento inteligente de todos los metadatos posibles.El beneficio es rápido, claramente cuantificable y muy alto. El software de OCR inteligente se basa en lógica difusa y nos permite definir los umbrales de validación totalmente adecuados a nuestros factores de confianza. Es decir, configuramos el umbral para que cuando el software acepta un acierto tengamos la seguridad total de que dichos metadatos se han reconocido perfectamente. En caso contrario, el software lanza una validación manual.¿Qué pasa si conseguimos que para determinados documentos, el 40%, 50%, 60% o incluso el 70% u 80% de ellos fueran procesados 100% automáticamente?. El ahorro es inmenso, la reducción del tiempo de proceso también, y la integración con nuestras infraestructuras de digitalización es muy sencilla (basta con desviar unos cuantos documentos de un tipo concreto a Oracle Forms Recognition y evaluar el resultado).Os animo a que veáis estos productos y consigamos hacer realidad la reducción de papel.

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  • Una de codecs, HTML5 y navegadores

    - by Eugenio Estrada
    Quien haya estado un pelín atento a las noticias tecnológicas, sabrá que esta semana Google en su conferencia Google IO ha publicado su códec de vídeo VP8 para entrar en la guerra de los codecs en los navegadores. Este códec lo ha liberado en el formato WebM que incluye el códec Ogg para el audio, todo envuelto en un contenedor Matroska (MKV para los amigos). Lo interesante es que parece que lo han optimizado para un uso mejor en Web tanto para escritorio, móvil y ahora televisión (con Google TV...(read more)

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  • Why does aptitude want to remove a bunch of files?

    - by Mediterran81
    Recently I encountered dependencies resolve issues when using APTITUDE (it is my favorite). Nevertheless, I started to feel that APTITUDE does not behave as it is supposed to be in 64 bits systems while apt-get works fine. Can someone confirm that APTITUDE is buggy in Ubuntu 11.10 amd64? Edit: For example, when tried to install ntfs-config using APTITUDE, it asked me to remove over 100 packages (skype for example), while using apt-get worked fine. han@L502X:~$ sudo aptitude install ntfs-config [sudo] password for han: The following NEW packages will be installed: ntfs-3g{ab} ntfs-config 0 packages upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/640 kB of archives. After unpacking 2,466 kB will be used. The following packages have unmet dependencies: ntfs-3g: Conflicts: ntfsprogs but 2.0.0-1ubuntu4 is installed. The following actions will resolve these dependencies: Remove the following packages: 1) flashplugin-downloader 2) flashplugin-installer 3) libasound2 4) libasound2-plugins 5) libasyncns0 6) libatk1.0-0 7) libaudio2 8) libavahi-client3 9) libavahi-common3 10) libc6 11) libcairo2 12) libcomerr2 13) libcups2 14) libcurl3 15) libdatrie1 16) libdb5.1 17) libdbus-1-3 18) libdbusmenu-qt2 19) libexpat1 20) libffi6 21) libflac8 22) libfontconfig1 23) libfreetype6 24) libgcc1 25) libgcrypt11 26) libgdk-pixbuf2.0-0 27) libglib2.0-0 28) libgnutls26 29) libgpg-error0 30) libgssapi-krb5-2 31) libgtk2.0-0 32) libice6 33) libidn11 34) libjack-jackd2-0 35) libjasper1 36) libjpeg62 37) libjson0 38) libk5crypto3 39) libkeyutils1 40) libkrb5-3 41) libkrb5support0 42) liblcms1 43) libldap-2.4-2 44) libmng1 45) libnspr4 46) libnspr4-0d 47) libnss3 48) libnss3-1d 49) libogg0 50) libpango1.0-0 51) libpcre3 52) libpixman-1-0 53) libpng12-0 54) libpulse0 55) libqt4-dbus 56) libqt4-declarative 57) libqt4-network 58) libqt4-script 59) libqt4-sql 60) libqt4-xml 61) libqt4-xmlpatterns 62) libqtcore4 63) libqtgui4 64) librtmp0 65) libsamplerate0 66) libsasl2-2 67) libsasl2-modules 68) libselinux1 69) libsm6 70) libsndfile1 71) libspeexdsp1 72) libsqlite3-0 73) libssl1.0.0 74) libstdc++6 75) libtasn1-3 76) libthai0 77) libtiff4 78) libuuid1 79) libvorbis0a 80) libvorbisenc2 81) libwrap0 82) libx11-6 83) libxau6 84) libxcb-render0 85) libxcb-shm0 86) libxcb1 87) libxcomposite1 88) libxcursor1 89) libxdamage1 90) libxdmcp6 91) libxext6 92) libxfixes3 93) libxft2 94) libxi6 95) libxinerama1 96) libxrandr2 97) libxrender1 98) libxss1 99) libxt6 100) libxv1 101) nspluginviewer 102) nspluginwrapper 103) ntfsprogs 104) skype 105) sni-qt 106) zlib1g Leave the following dependencies unresolved: 107) flashplugin-downloader recommends libasound2-plugins (>= 1.0.16) Accept this solution? [Y/n/q/?]

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  • Avoid Resource Conflict

    - by Yan Cheng CHEOK
    I have a MFC exe, trying to dynamic load a MFC dll. // This is code in MFC exe HINSTANCE h = AfxLoadLibrary(_T("DLL.dll")); typedef void(*FUN)(); FUN fun = (FUN)GetProcAddress(h, "loveme"); FreeLibrary(h); Both MFC exe and MFC dll, are having their own resource file. However, I realize that, if MFC exe and MFC dll are having a same resource ID, conflict may occur. // This is code in MFC dll. Both exe and dll, are having resources with // ID 101. CString s; s.LoadString(101); // Resource 101 in exe is being shown :( AfxMessageBox(s); May I know how I can avoid resource ID conflict problem? Can we have two resource in both MFC and DLL, although their ID is different, but they are independent from each other? This means, DLL will only load DLL's resource. EXE will only load EXE's resource.

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  • How to implement Comet server side with Python?

    - by Morgan Cheng
    I once tried to implement Comet in PHP. Soon, I found that PHP is not suitable for Comet, since each HTTP request will occupy one process/thread. As a result, it doesn't scale well. I just installed mod_python in my XAMPP. I thought it would be easy to implement Comet with Python asynchronous programming. But still cannot get a clue how to implement it. Is there any idea how to implement Comet in mod_python?

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  • Help to Install STLPort in VC6

    - by Yan Cheng CHEOK
    I try to follow the following steps to install STLPort in VC6 1) I change C:\Program Files\Microsoft Visual Studio\VC98\Bin\VCVARS32.BAT content set INCLUDE=%MSVCDir%\ATL\INCLUDE;%MSVCDir%\INCLUDE;%MSVCDir%\MFC\INCLUDE;%INCLUDE% set LIB=%MSVCDir%\LIB;%MSVCDir%\MFC\LIB;%LIB% to (The directory C:\STLport-5.2.1\lib is not exsits?) set INCLUDE=C:\STLport-5.2.1\stlport;%MSVCDir%\ATL\INCLUDE;%MSVCDir%\INCLUDE;%MSVCDir%\MFC\INCLUDE;%INCLUDE% set LIB=C:\STLport-5.2.1\lib;%MSVCDir%\LIB;%MSVCDir%\MFC\LIB;%LIB% 2) I C:\>cd C:\STLport-5.2.1\build\lib C:\STLport-5.2.1\build\lib>"c:\Program Files\Microsoft Visual Studio\VC98\bin\VCVARS32.BAT" Setting environment for using Microsoft Visual C++ tools. C:\STLport-5.2.1\build\lib>c:\STLport-5.2.1\configure.bat msvc6 STLport Configuration Tool for Windows The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. Setting compiler: Microsoft Visual C++ 6.0 The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. Setting platform: Windows XP The system cannot find the path specified. Done configuring STLport. Go to build/lib folder and type "nmake clean install" to build and install STLport to the "lib" and "bin" folders. Go to build/test/unit folder and type nmake clean install to build unit tests and install them in bin folder. 3) The code within configure.bat, which give me The system cannot find the path specified is REM initially create/overwrite config.mak echo # STLport Configuration Tool for Windows > build\Makefiles\nmake\config.mak echo # >> build\Makefiles\nmake\config.mak echo # config.mak generated with command line: >> build\Makefiles\nmake\config.mak echo # configure %1 %2 %3 %4 %5 %6 %7 %8 %9 >> build\Makefiles\nmake\config.mak echo # >> build\Makefiles\nmake\config.mak What I shall change them to? How can I continue the build? Thanks.

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  • Is it fair for us to conclude XOR string encryption is less secure than well known encryption (Say Blowfish)

    - by Yan Cheng CHEOK
    I was wondering, is it fair to conclude, XOR string encryption is less secure than other encryption method, say Blowfish This is because for both methods, their input are Unencrypted string A secret key string XOR(string value,string key) { string retval(value); short unsigned int klen=key.length(); short unsigned int vlen=value.length(); short unsigned int k=0; short unsigned int v=0; for(v;v<vlen;v++) { retval[v]=value[v]^key[k]; k=(++k<klen?k:0); } return retval; } Is there any proof that XOR encryption method is more easy to be "broken" than Blowfish if the same key is being chosen?

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  • How to write Asynchronous LINQ query?

    - by Morgan Cheng
    After I read a bunch of LINQ related stuff, I suddenly realized that no articles introduce how to write asynchronous LINQ query. Suppose we use LINQ to SQL, below statement is clear. However, if the SQL database responds slowly, then the thread using this block of code would be hindered. var result = from item in Products where item.Price > 3 select item.Name; foreach (var name in result) { Console.WriteLine(name); } Seems that current LINQ query spec doesn't provide support to this. Is there any way to do asynchronous programming LINQ? It works like there is a callback notification when results are ready to use without any blocking delay on I/O.

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  • How to protect critical section in PHP?

    - by Morgan Cheng
    I did some search about this topic but found nothing valuable. If I don't use PHP default session handler, there is no session lock at request level. So, I have to protect critical section by myself. In Java, we have synchronized. In C#, we have lock. In PHP, how to do that?

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