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  • Slow login to load-balanced Terminal Server 2008 behind Gateway Server

    - by Frans
    I have a small load-balanced (using Session Broker) Terminal Server 2008 farm behind a Gateway Server which is accessed from the Internet. The problem I have is that there is a delay of 20-30 seconds if the session broker switches the user to another server during login. I think this is related to the fact that I am forcing the security layer to be RDP rather than SSL. The background The Gateway server has a public routeable IP addres and DNS name so it can be accessed from the Internet and all users come in via this route (the system is used to provide access to hosted applications to external customers). The actual terminal servers only have internal IP addresses. This works really well, except that with a Vista or Windows 7 client, the Remote Desktop client will negotiate with the server to use SSL for the security layer. This then exposes the auto-generated certificate that TS1 or TS2 has - but since they are internal, auto-generated certificates, the client will get a stern warning that the certificate is not valid. I can't give the servers a properly authorised certificate as the servers do not have public routeable IP address or DNS name. Instead, I am using Group Policy to force the connections to be over RDP instead of SSL. \Computer Configuration\Policies\Administrative Templates\Windows Components\Terminal Services\Terminal Server\Security\Require use of specific security layer for remote (RDP) connections The Windows 7 user now gets a much less stern warning that "the server's identity cannot be confirmed" which I can live with. I don't have enough control over the end-user's machines to ask them to install a new root certificate either. TS1 and TS2 are also load-balanced using the Session Broker, which is installed on the Gateway Server. I am using round-robin DNS, so the user's initial connection will go via Gateway1 to either TS1 or TS2. TS1/TS2 will then talk to the session broker and may pass the user to the other server. I.e. the user may get connected to TS2, but after talking to the session broker the user may be passed to TS1, which is where they will run their session. When this switching of servers happens, in my setup, the screen sits with the word "Welcome" for 20-30 seconds after which it flickers, Welcome is shown again and then flashing through nthe normal login screens (i.e. "wait for user profile manager" etc). Having done some research, I think what is happening is that the user is being fully logged on to TS2 (while "Welcome" is shown) before being passed to TS1, where they are then logged in again. It is interesting that normally when you see the ""Welcome" word, the little circle to left rotates. However, it does not rotate during this delay - the screen just looks frozen. This blog post leads me to think that this is because CredSSP is not being used, probably because I am disallowing SSL and forcing RDP. What I have tried I enabled SSL again which removes the "Welcome" delay. However, it seems to introduc a new delay much earlier in the process. Specifically, when the RDP client is saying "initialising connection" - this is now much slower. Quite apart from the fact that my certificate problem precludes me using that solution without considerable difficulty. I tried disabling the load balancing (just remove the servers from the session broker farm) and the connections do not have any delay. The problem is also intermittent in the sense that it only happens when the user gets bumped from one server to another. I tested this by trying to connect directly to TS1 (via the Gateway, of course) and then checking which server I actually got connected to. Just to be sure, I also by-passed the round-robin DNS to see if it had any impact and it doesn't. The setup is essentially in line with MS recommendations here: TS Session Broker Load Balancing Step-by-Step Guide I tried changing to using a dedicated redirector. Basically, rather than using a round-robin DNS, I pointed my DNS to the Gateway server and configured it to be a dedicated redirector (disallow logons, add it to the farm). Same problem, alas. Any ideas or suggestions gratefully received.

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  • SQLAuthority News – Guest Post – FAULT Contract in WCF with Learning Video

    - by pinaldave
    This is guest post by one of my very good friends and .NET MVP, Dhananjay Kumar. The very first impression one gets when they meet him is his politeness. He is an extremely nice person, but has superlative knowledge in .NET and is truly helpful to all of us. Objective: This article will give a basic introduction on: How to handle Exception at service side? How to use Fault contract at Service side? How to handle Service Exception at client side? A Few Points about Exception at Service Exception is technology-specific. Exception should not be shared beyond service boundary. Since Exception is technology-specific, it cannot be propagated to other clients. Exception is of many types. CLR Exception Windows32 Exception Runtime Exception at service C++ Exception Exception is very much native to the technology in which service is made. Exception must be converted from technology-specific information to natural information that can be communicated to the client. SOAP Fault FaultException<T> Service should throw FaultException<T>, instead of the usual CLR exception. FaultException<T> is a specialization of Fault Exception. Any client that programs against FaultException can handle the Exception thrown by FaultException<T>. The type parameter T conveys the error detail. T can be of any type like Exception, CLR Type or any type that can be serialized. T can be of type Data contract. T is a generic parameter that conveys the error details. You can read complete article http://dhananjaykumar.net/2010/05/23/fault-contract-in-wcf-with-learning-video/ Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLAuthority News, T SQL, Technology

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  • WebLogic Server 12c????????????????????????????????????/???????WebLogic Server 12c Forum 2012?????

    - by ???02
    2012?1??????WebLogic Server 12c???200??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????2012?8????????WebLogic Server 12c Forum 2012????????·??????????????????????????/?????????????????(???) ????????????WebLogic Server 12c????????? ??WebLogic Server???????·???????WebLogic Server?????????????????????????????????????WebLogic Server 12c Forum 2012?????????????????·????????????????????????????????????????????????????·?????????????WebLogic Server 12c??????????????/????????????? ???????????????????????????? ????????????????????????????????????? ?????? ??????????????????????????????????? ??????????????????????????????????????????????????????????????????????????“??????????????????????????”????????????????????????WebLogic Server 11g?????????????????? (1)????????????????????! = ??ID????????? WebLogic Server??????????????????????????????????????????????????????????????????????? ????????????????? ?????????·??????????????????? ??????init.d???????????? ???????????????ID????(boot.properties)??????????????????????WebLogic Server?????????????????????????????????? ???ID????????? <DOMAIN_HOME>/servers//security???????????·?????boot.properties????????????2??????? username= password= ???????????????????WebLogic Server?????????????????????????????????????????????????????????????????? (2)WLST???????????????????! = WLST????????? WebLogic Server???????????????????????????????????????????????????????????????/?????????????WLST(WebLogic Scripting Tool)????????????????????????????????????????????????????????????????????/????????????WLST?????????? ?????????????WLST???????????????????????Python?Java?????Jython?????????????WebLogic Server?????????????MBean???????????????????????????????????WLST?????????????Excel????????????????????????????????????????????????????????????????????????????WLST?????????????????????????????????? ?WLST???????????? ????????[????·????]-[???????]?????????????????[??]???????? ???????????????????????????[?????]????????py?????WLST???????????????????????????[??]??????????????????? ???????????????WLST?????????????????????WLST???????????????????????????????????????????????????????????????????? (3)????SQL?WebLogic Server???????! = ????·????? ??????????WebLogic Server??????????????????????????????SQL??????????????????????????????????·????????????????????????????????????????·???????????WebLogic Server????????·???????·???????????????WebLogic Server????/?????????????????????????????????????JDBC????????????????????????????SQL?ResultSet?????????????·????????? ????·????????????? ?????·??????? ????????[??]-[????]-[?????]-?????????????WebLogic Server?????/?????????????????????????????????????????[weblogic]-[jdbc]-[sql]-[DebugJDBCSQL]?????????[???]???????? ??????JDBC?????·???????·????????? ????/???????????????????????/???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? (4)[??]??????????????! = [??????????]????? ?[??]????????????????????????????????????????????????????????????????????????????[??]?????????????????????????????????2??????????????????????????????????????????????????????????????????????????????????????????????????????[??????????]?????????2?????????????????????????? ?????????2????????????? ????????[??????]-[???]-[???????????????]??????[???·???????]?????[??????????]?????????[??]???????? ??????????????????????????? (5)????????????????????????????! = ?V$SESSION.PROGRAM?????????????? ???Oracle Database?????????????????????????? WebLogic Server?????????????????????????????????????????????????????????????????????????????1??WebLogic Server????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ???????????????V$SESSION.PROGRAM?????????????Oracle Database?????????·?????????????????????????????????V$SESSION????????????????PROGRAM????????????????????????????WebLogic Server???????????????????????????JDBC Thin Client???JDBC????????????????????????????????????????PROGRAM???????????????????????·?????????????????????? V$SESSION.PROGRAM???????????????????????????? ?V$SESSION.PROGRAM??????????????? ???????????([???JDBC?????????]??)?[?????]?????1??????? v$session.program= (6)???·???????·????????! = ????·????·????????? WebLogic Server?????????????????????????????????(???·??)????????????????·???????1??????????????????????????????????????????WebLogic Server?????????????????????????????????? ??????????????????·????·?????????????????????????WebLogic Server?????????????????????????????????????? ???????????JDK???????Log4j????????????????WebLogic Server???????????????? WebLogic Server????????JDK?Log4j??????????????????JDK?????????? ????·????·???????????????? ?????·????·????????? JDK???Log4j?????????????????????/?????????????? ?JDK???:weblogic.logging.ServerLoggingHandler ?Log4j???:weblogic.logging.log4j.ServerLoggingAppender ??????Log4j?????????????(????)? <appender name="file" class="org.apache.log4j.FileAppender"> <param name="File" value=“applog.log" /> <param name="Append" value="true" /> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d %5p %c{1} - %m%n" /> </layout> </appender> <appender name="server" class="weblogic.logging.log4j.ServerLoggingAppender"/> ?????????????????????????????????????????WebLogic Server?????????????????????????????????????? ?JDK???:-Djava.util.loggin.config.file=<PATH> ?Log4j???:-Dlog4j.configuration=<PATH> ???????????WAR??????????????????????·????·??????????WebLogic Server??????????????????????????????????????WebLogic Server???????????????????? (7)BEA??????????????????????! = GetMessage??????? WebLogic Server????????·??????????????(?BEA-XXXXXX??????????????????BEA?????)????WebLogic Server?HTML??????????????????Web????????????????????????????????????????????? ????????????GetMessage?????????????BEA?????????????????????????????????????????? ?GetMessage????????? java?????WebLogic Server?GetMessage???????????? java weblogic.GetMessage ?????????? ?-id XXXX:???????????? ?-verbose:????????? ?-lang XX:???????(?????????????????????????????????????) ????BEA-000337?????????????????????????????? java weblogic.GetMessage -verbose -id 000337 -lang ja 000337: ?????"{2}"?????{0}?"{1}"??????????????????????????(StuckThreadMaxTime)"{3}"?????????????·????: {4} L10n?????: weblogic.kernel I18n?????: weblogic.kernel ??????: WebLogicServer ???: ??? ????·????: false ????????: ???????????????????????????????? ??: ???????????????????????????????????? ?????: ??????????????????????????????????????????????????????????????·???(weblogic.Admin THREAD_DUMP)????????? ?????????BEA?????????????????????????????????????????????????????????????????????????????????? ????????“WebLogic??”!? WebLogic Server 12c????/??? ????????????? ???????????? ????????????????? ?????????????? ???????????? ????????????WebLogic Server???????????????????????????????????????????????WebLogic Server 12c?????????????????????????????????????????????????????????WebLogic Server 11g(10.3.6)???????????? ?????????Mac OS X???(???????)?IE 6?7??????????????? ??OTN??????????????????System Requirements and Supported Platforms for WebLogic Server 12c (12.1.1.x)?????????????Mac OS?????????????2012?8?2?????Mac OS X Snow Leopard????Java SE 7?????????? ???Internet Explorer(IE) 6.x??7.x???????????????????IE????????IE 8.x???????????? ????Web?????WebLogic Server?????????Web???·??????64?????????????(WebLogic Server??????????64?????)?????????WebLogic Server????????????????????????????????????????? ?RESTful????????? Java EE 6?JAX-RS????????????WebLogic Server 12c???????????????????????????????????? ?RESTful??????????? [????]-[??]-[??]?[RESTful??????????]?????????WebLogic Server??????????????????URL?????????????????????????? http(s)://:/management/tenant-monitoring/servers ???????servers??????clusters???applications???datasources??????????????????????????????????????????????? ????HTML??????JSON?XML???????????????????????????????????????????????????????????????????? ?JDBC????????(1):??????·???? ???????????????????????WebLogic Server??????????????????????????????????12c??Active GridLink for RAC???????????????????????????????????? 1??????????·?????????????????????[????]?????????[??????]????????????????????????????????????????????????????????????????????? <DOMAIN_HOME>/servers//logs/datasource.log ?????????????????????????????????????? ??????????????????????WLDF????????????????WebLogic Server 12c?????????????????????? ?JDBC????????(2):?????????? ????????????????[??]-[?????]???[????]?????????????????????????????????????????????????????????????????WebLogic Server 12c?????????????????????????????????????? ??????????????????????????????????WebLogic Server 11g(10.3.1)???1??????????????????????????????????????? ?JDBC????????(3):????????? WebLogic Server 12c??[??]-[?????]????????????????????[?????????]???1???????????????????????????????????????????????????????????????????????????????????????????????????????????????Oracle Database?????????????????????????? ErrorCode ????? 3113 ???????end-of-file???????? 3114 Oracle?????????? 1033 Oracle??????????????? 1034 Oracle??????? 1089 ?????????? - ?????????? 1090 ???????? - ?????????? 17002 I/O?? ?????????(1):?????/?????????????????? ??????????2?????? 1???WebLogic Server????????????????????????????????????????? -Dweblogic.management.username= -Dweblogic.management.password= ????????????ID???????????????? ?????????(2):SSL????Certicom?????? SSL?????Certicom(?????10.3.3?????)???????JSSE(Java Secure Socket Extension)????????????????????????????????????????? ??????????????????????????????? ????????????WebLogic Server?????????????????????????????????Java?????????·????2??????????Java????????????????nodemanager.properties?????????????StartScriptEnabled?????????false??true?????? ?????????????false?????????????WebLogic Server??????????????????true??????????????startWebLogic???????????????WebLogic Server??????????????startWebLogic???????????????????????????????????????????????????????????????? ???/???????(1):setDomainEnv???????????????? ??/?????????????“?????·???”????????????????????????????2???? 1??setDomainEnv?????????????????????????????32???JDK????????Perm????????????? ?WebLogic Server 11g(10.3.5) MEM_PERM_SIZE_64BIT="-XX:PermSize=128m" MEM_PERM_SIZE_32BIT="-XX:PermSize=48m" ... MEM_MAX_PERM_SIZE_64BIT="-XX:MaxPermSize=256m" MEM_MAX_PERM_SIZE_32BIT="-XX:MaxPermSize=128m" ?WebLogic Server 12c(12.1.1) MEM_PERM_SIZE_64BIT="-XX:PermSize=128m" MEM_PERM_SIZE_32BIT="-XX:PermSize=128m" ... MEM_MAX_PERM_SIZE_64BIT="-XX:MaxPermSize=256m" MEM_MAX_PERM_SIZE_32BIT="-XX:MaxPermSize=256m" ???/???????(2):stopWebLogic??????shutdown.py????????? ??/???????????2????stopWebLogic??????????????shutdown.py??????????????????????????????ID/????????????????????????shutdown.py??????????????WebLogic Server 11g(10.3.3)?????????????ID????????????????????WebLogic Server 12c???????? ????????????? ?????????????/??? ???????????/?????????????? ???KernelMBean????UseConcurrentQueueForRequestManager?????????????????????????????[????]--[??????]-[??]?[?????·???????????????]??????????????????????????????????????????MBean???????????????????????????????????????????????????????????????????????????????????????????(???)? ??1???Windows?????????beasvc.exe????wlsvc.exe????????????????????????wlsvc _???????BEA????????????????(???)? ????WLST???????Jython???????????????????2.1??2.2.1????????(???11g??2.2.1???????)???????????????……?(???)? ???????WebLogic Server 12c???????????????????????/????????????????????????????????????????WebLogic Server?????????WebLogic Server????????????Facebook?????????WebLogic!??????????????

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  • How to setup Windows Server 2008 R2 Server Core

    - by Robert Koritnik
    I'm an MSDN subscriber. I would like to install Windows Server 2008 R2 Server Core, but when I insert MSDN #4629 DVD there're only full versions of Windows Server 2008 R2. How am I supposed to install Server Core then? Any suggestions? Is it possible to covert it back to server core when a GUI version's already installed?

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  • Multiple IPs on single server - Specify which is used to connect (MS server 2008 / DNS)

    - by runboy
    I have a Windows 2008 server with multiple IPs that is acting as DNS server. I have set the DNS server up to only accept connections on a single of these IPs. The DNS is serving as secondary DNS and when it connects to the primary DNS server it is not connecting with this particular IP address, but one of the other IPs. Is there a way in which I can make sure the server connects using the correct IP?

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  • SQL Server Management Studio Express 2005 has no Configuration Manager

    - by brohjoe
    Where is the configuration manager for SQL Express 2005? I need to configure SQL Server for TCP/IP but there is no configuration manager with the package. I see SQL Server Database Publishing Wizard, I see SQL Server Migration Assistant for Access, but no Configuration Manager. According to the MSDN, there should be one. I've even looked online for a download of the Configuration Manager for SQL Server 2005, but could not find one. Did I miss something in the download or should I just scrap SQL Server Express and download the full-blown SQL Server for Developers?

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  • Windows web server and SQL Server on same dedicated server

    - by asinc
    I'm currently trying to decide on the best approach to handle hosting a few moderate traffic websites for production e-commerce and online applications. We'd like to move to a dedicated server and are looking at this as the most likely machine: Quad Core Intel Core2Quad Q9550 Processor, 2.83 Ghz X 4, 4 GB Kingston Ram This would run Windows Web Server 2008 R2 x64 and potentially also Sql Server Web 2008 and SmarterMail server. Given that we already pay for a high-end VPS for development, testing, shared version control we'd like to avoid going with two servers for production. We'd like to avoid using shared sql server hosting and have thought of using the development server as the database server as an option too - but potentially a security risk due to use for development by internal and contract users. The questions are: - Do you feel there would be performance degradation by running this on the same machine? - Are there significant issues to be concerned about if we do this? We understand that best practice would be to run separate db and app servers but the volume of traffic is currently not that high and adding another server just for database is currently too costly. - What are others doing out there? Alternatively, would you recommend instead going with two separate VPS servers with 2GB RAM each on Hyper-v which would be about the same cost as the single dedicated server above? Thanks!

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  • SQL SERVER – PHP on Windows and SQL Server Training Kit

    - by pinaldave
    The PHP on Windows and SQL Server Training Kit includes a comprehensive set of technical content including demos and hands-on labs to help you understand how to build PHP applications using Windows, IIS 7.5 and SQL Server 2008 R2. This release includes the following: PHP & SQL Server Demos Integrating SQL Server Geo-Spatial with PHP SQL Server Reporting Services and PHP PHP & SQL Server Hands On Labs Introduction to Using SQL Server with PHP Using SQL Server Full-Text Search and FILESTREAM Storage with PHP New: Getting Started with SQL Server Migration Assistant for MySQL Download SQL Server PHP on Windows and SQL Server Training Kit Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Documentation, SQL Download, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • SQL SERVER – Determine if SSRS 2012 is Installed on your SQL Server

    - by Pinal Dave
    This example is from the Beginning SSRS by Kathi Kellenberger. Supporting files are available with a free download from the www.Joes2Pros.com web site. Determine if SSRS 2012 is Installed on your SQL Server You may already have SSRS, or you may need to install it. Before doing any installation it makes sense to know where you are now. If you happened to install SQL Server with all features, you have the tools you need. There are two tools you need: SQL Server Data Tools and Reporting Services installed in Native Mode. To find out if SQL Server Data Tools (SSDT) is installed, click the Start button, go to All Programs, and expand SQL Server 2012. Look for SQL Server Data Tools   Now, let’s check to see if SQL Server Reporting Services is installed. Click the Start > All Programs > SQL Server 2012 > Configuration Tools > SQL > Server Configuration Manager   Once Configuration Manager is running, select SQL Server Services. Look for SQL Server Reporting Services in the list of services installed. If you have both SQL Server Reporting Services service and SQL Server Developer tools installed, you will not have to install them again. You may have SQL Server installed, but are missing the Data Tools or the SSRS service or both. In tomorrow blog post we will go over how to install based on where you are now.   Tomorrow’s Post Tomorrow’s blog post will show how to install and configure SSRS. If you want to learn SSRS in easy to simple words – I strongly recommend you to get Beginning SSRS book from Joes 2 Pros. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL Tagged: Reporting Services, SSRS

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  • SQL Server 2005 Merge Replication to SQL Server CE 3.5

    - by user33067
    Hi, In my organization, we have a SQL Server 2005 database server (DBServer). Users of an application will normally be connected to DBServer, but, occasionally, would like to disconnect and continue their work on a laptop using SQL Server Compact Edition 3.5 (SQLCE). Due to this, we have been looking into using Merge Replication between the DBServer and SQLCE. From what I have read about this process, IIS must be installed on "the server"... yet, I have found no indication to whether this is talking about DBServer or SQLCE. I had assumed the documentation was referring to DBServer and proposed this to our networking staff. That idea was quickly put to rest as it is not our policy to install IIS on an internal server. This is where our SQL Server 2005 web server (WebServer) entered the picture. The idea being that IIS would be installed on WebServer and would be the conduit for DBServer and SQLCE to communicate. This sounded like a good idea at first, until I started looking for documentation on this type of setup. Everything I have been able deals with a DBServer -- SQLCE -- DBServer setup... nothing on DBServer -- WebServer -- SQLCE -- WebServer -- DBServer. Questions: Is going with a 3 server setup ideal? Does anyone have documentation on this type of setup? Does IIS even need to be running on one of the big servers, or can it just run off the laptop with SQLCE on it? (I'd really like this option ;))

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  • PHP crashing (seg-fault) under mod_fcgi, apache

    - by Andras Gyomrey
    I've been programming a site using: Zend Framework 1.11.5 (complete MVC) PHP 5.3.6 Apache 2.2.19 CentOS 5.6 i686 virtuozzo on vps cPanel WHM 11.30.1 (build 4) Mysql 5.1.56-log Mysqli API 5.1.56 The issue started here http://stackoverflow.com/questions/6769515/php-programming-seg-fault. In brief, php is giving me random segmentation-faults. [Wed Jul 20 17:45:34 2011] [error] mod_fcgid: process /usr/local/cpanel/cgi-sys/php5(11562) exit(communication error), get unexpected signal 11 [Wed Jul 20 17:45:34 2011] [warn] [client 190.78.208.30] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server [Wed Jul 20 17:45:34 2011] [error] [client 190.78.208.30] Premature end of script headers: index.php About extensions. When i compile php with "--enable-debug" flag, i have to disable this line: zend_extension="/usr/local/IonCube/ioncube_loader_lin_5.3.so" Otherwise, the server doesn't accept requests and i get a "The connection with the server was reset". It is possible that i have to disable eaccelerator too because of the same reason. I still don't get why apache gets running it some times and some others not: extension="eaccelerator.so" Anyway, after i get httpd running, seg-faults can occurr randomly. If i don't compile php with "--enable-debug" flag, i can get DETERMINISTICALLY a php crash: <?php class Admin_DbController extends Controller_BaseController { public function updateSqlDefinitionsAction() { $db = Zend_Registry::get('db'); $row = $db->fetchRow("SHOW CREATE TABLE 222AFI"); } } ?> BUT if i compile php with "--enable-debug" flag, it's really hard to get this error. I must add some complexity to make it crash. I have to be doing many paralell requests for a few seconds to get a crash: <?php class Admin_DbController extends Controller_BaseController { public function updateSqlDefinitionsAction() { $db = Zend_Registry::get('db'); $tableList = $db->listTables(); foreach ($tableList as $tableName){ $row = $db->fetchRow("SHOW CREATE TABLE " . $db->quoteIdentifier($tableName)); file_put_contents( DB_DEFINITIONS_PATH . '/' . $tableName . '.sql', $row['Create Table'] . ';' ); } } } ?> Please notice this is the same script, but creating DDL for all tables in database rather than for one. It seems that if php is heavy loaded (with extensions and me doing many paralell requests) it's when i get php to crash. About starting httpd with "-X": i've tried. The thing is, it is already hard to make php crash with --enable-debug. With "-X" option (which only enables one child process) i can't do parallel requests. So i haven't been able to create to proper debug backtrace: https://bugs.php.net/bugs-generating-backtrace.php My concrete question is, what do i do to get a coredump? root@GWT4 [~]# httpd -V Server version: Apache/2.2.19 (Unix) Server built: Jul 20 2011 19:18:58 Cpanel::Easy::Apache v3.4.2 rev9999 Server's Module Magic Number: 20051115:28 Server loaded: APR 1.4.5, APR-Util 1.3.12 Compiled using: APR 1.4.5, APR-Util 1.3.12 Architecture: 32-bit Server MPM: Prefork threaded: no forked: yes (variable process count) Server compiled with.... -D APACHE_MPM_DIR="server/mpm/prefork" -D APR_HAS_SENDFILE -D APR_HAS_MMAP -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled) -D APR_USE_SYSVSEM_SERIALIZE -D APR_USE_PTHREAD_SERIALIZE -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT -D APR_HAS_OTHER_CHILD -D AP_HAVE_RELIABLE_PIPED_LOGS -D DYNAMIC_MODULE_LIMIT=128 -D HTTPD_ROOT="/usr/local/apache" -D SUEXEC_BIN="/usr/local/apache/bin/suexec" -D DEFAULT_PIDLOG="logs/httpd.pid" -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" -D DEFAULT_LOCKFILE="logs/accept.lock" -D DEFAULT_ERRORLOG="logs/error_log" -D AP_TYPES_CONFIG_FILE="conf/mime.types" -D SERVER_CONFIG_FILE="conf/httpd.conf"

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  • SQL SERVER – Guest Posts – Feodor Georgiev – The Context of Our Database Environment – Going Beyond the Internal SQL Server Waits – Wait Type – Day 21 of 28

    - by pinaldave
    This guest post is submitted by Feodor. Feodor Georgiev is a SQL Server database specialist with extensive experience of thinking both within and outside the box. He has wide experience of different systems and solutions in the fields of architecture, scalability, performance, etc. Feodor has experience with SQL Server 2000 and later versions, and is certified in SQL Server 2008. In this article Feodor explains the server-client-server process, and concentrated on the mutual waits between client and SQL Server. This is essential in grasping the concept of waits in a ‘global’ application plan. Recently I was asked to write a blog post about the wait statistics in SQL Server and since I had been thinking about writing it for quite some time now, here it is. It is a wide-spread idea that the wait statistics in SQL Server will tell you everything about your performance. Well, almost. Or should I say – barely. The reason for this is that SQL Server is always a part of a bigger system – there are always other players in the game: whether it is a client application, web service, any other kind of data import/export process and so on. In short, the SQL Server surroundings look like this: This means that SQL Server, aside from its internal waits, also depends on external waits and settings. As we can see in the picture above, SQL Server needs to have an interface in order to communicate with the surrounding clients over the network. For this communication, SQL Server uses protocol interfaces. I will not go into detail about which protocols are best, but you can read this article. Also, review the information about the TDS (Tabular data stream). As we all know, our system is only as fast as its slowest component. This means that when we look at our environment as a whole, the SQL Server might be a victim of external pressure, no matter how well we have tuned our database server performance. Let’s dive into an example: let’s say that we have a web server, hosting a web application which is using data from our SQL Server, hosted on another server. The network card of the web server for some reason is malfunctioning (think of a hardware failure, driver failure, or just improper setup) and does not send/receive data faster than 10Mbs. On the other end, our SQL Server will not be able to send/receive data at a faster rate either. This means that the application users will notify the support team and will say: “My data is coming very slow.” Now, let’s move on to a bit more exciting example: imagine that there is a similar setup as the example above – one web server and one database server, and the application is not using any stored procedure calls, but instead for every user request the application is sending 80kb query over the network to the SQL Server. (I really thought this does not happen in real life until I saw it one day.) So, what happens in this case? To make things worse, let’s say that the 80kb query text is submitted from the application to the SQL Server at least 100 times per minute, and as often as 300 times per minute in peak times. Here is what happens: in order for this query to reach the SQL Server, it will have to be broken into a of number network packets (according to the packet size settings) – and will travel over the network. On the other side, our SQL Server network card will receive the packets, will pass them to our network layer, the packets will get assembled, and eventually SQL Server will start processing the query – parsing, allegorizing, generating the query execution plan and so on. So far, we have already had a serious network overhead by waiting for the packets to reach our Database Engine. There will certainly be some processing overhead – until the database engine deals with the 80kb query and its 20 subqueries. The waits you see in the DMVs are actually collected from the point the query reaches the SQL Server and the packets are assembled. Let’s say that our query is processed and it finally returns 15000 rows. These rows have a certain size as well, depending on the data types returned. This means that the data will have converted to packages (depending on the network size package settings) and will have to reach the application server. There will also be waits, however, this time you will be able to see a wait type in the DMVs called ASYNC_NETWORK_IO. What this wait type indicates is that the client is not consuming the data fast enough and the network buffers are filling up. Recently Pinal Dave posted a blog on Client Statistics. What Client Statistics does is captures the physical flow characteristics of the query between the client(Management Studio, in this case) and the server and back to the client. As you see in the image, there are three categories: Query Profile Statistics, Network Statistics and Time Statistics. Number of server roundtrips–a roundtrip consists of a request sent to the server and a reply from the server to the client. For example, if your query has three select statements, and they are separated by ‘GO’ command, then there will be three different roundtrips. TDS Packets sent from the client – TDS (tabular data stream) is the language which SQL Server speaks, and in order for applications to communicate with SQL Server, they need to pack the requests in TDS packets. TDS Packets sent from the client is the number of packets sent from the client; in case the request is large, then it may need more buffers, and eventually might even need more server roundtrips. TDS packets received from server –is the TDS packets sent by the server to the client during the query execution. Bytes sent from client – is the volume of the data set to our SQL Server, measured in bytes; i.e. how big of a query we have sent to the SQL Server. This is why it is best to use stored procedures, since the reusable code (which already exists as an object in the SQL Server) will only be called as a name of procedure + parameters, and this will minimize the network pressure. Bytes received from server – is the amount of data the SQL Server has sent to the client, measured in bytes. Depending on the number of rows and the datatypes involved, this number will vary. But still, think about the network load when you request data from SQL Server. Client processing time – is the amount of time spent in milliseconds between the first received response packet and the last received response packet by the client. Wait time on server replies – is the time in milliseconds between the last request packet which left the client and the first response packet which came back from the server to the client. Total execution time – is the sum of client processing time and wait time on server replies (the SQL Server internal processing time) Here is an illustration of the Client-server communication model which should help you understand the mutual waits in a client-server environment. Keep in mind that a query with a large ‘wait time on server replies’ means the server took a long time to produce the very first row. This is usual on queries that have operators that need the entire sub-query to evaluate before they proceed (for example, sort and top operators). However, a query with a very short ‘wait time on server replies’ means that the query was able to return the first row fast. However a long ‘client processing time’ does not necessarily imply the client spent a lot of time processing and the server was blocked waiting on the client. It can simply mean that the server continued to return rows from the result and this is how long it took until the very last row was returned. The bottom line is that developers and DBAs should work together and think carefully of the resource utilization in the client-server environment. From experience I can say that so far I have seen only cases when the application developers and the Database developers are on their own and do not ask questions about the other party’s world. I would recommend using the Client Statistics tool during new development to track the performance of the queries, and also to find a synchronous way of utilizing resources between the client – server – client. Here is another example: think about similar setup as above, but add another server to the game. Let’s say that we keep our media on a separate server, and together with the data from our SQL Server we need to display some images on the webpage requested by our user. No matter how simple or complicated the logic to get the images is, if the images are 500kb each our users will get the page slowly and they will still think that there is something wrong with our data. Anyway, I don’t mean to get carried away too far from SQL Server. Instead, what I would like to say is that DBAs should also be aware of ‘the big picture’. I wrote a blog post a while back on this topic, and if you are interested, you can read it here about the big picture. And finally, here are some guidelines for monitoring the network performance and improving it: Run a trace and outline all queries that return more than 1000 rows (in Profiler you can actually filter and sort the captured trace by number of returned rows). This is not a set number; it is more of a guideline. The general thought is that no application user can consume that many rows at once. Ask yourself and your fellow-developers: ‘why?’. Monitor your network counters in Perfmon: Network Interface:Output queue length, Redirector:Network errors/sec, TCPv4: Segments retransmitted/sec and so on. Make sure to establish a good friendship with your network administrator (buy them coffee, for example J ) and get into a conversation about the network settings. Have them explain to you how the network cards are setup – are they standalone, are they ‘teamed’, what are the settings – full duplex and so on. Find some time to read a bit about networking. In this short blog post I hope I have turned your attention to ‘the big picture’ and the fact that there are other factors affecting our SQL Server, aside from its internal workings. As a further reading I would still highly recommend the Wait Stats series on this blog, also I would recommend you have the coffee break conversation with your network admin as soon as possible. This guest post is written by Feodor Georgiev. Read all the post in the Wait Types and Queue series. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, Readers Contribution, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQL Wait Stats, SQL Wait Types, T SQL

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  • Replication: SQL Server 2008 Publisher with SQL Server Express 2005 Subscriber

    - by Jeremy
    Here is the setup: SQL Server 2008 Enterprise Server with a Merge Publication. SQL Server 2005 Express with pull subscription. There is no web or ftp setup. This is direct merge replication. Using the RMO objects from C#, I get a "class cannot be found." COM Error when accessing the MergePullSubscription.SynchronizationAgent property. I've tried with both the 2008 RMO dll's (version 10 dll's) and the 2005 RMO dll's (version 9 dll's). When trying to use replmerge.exe, I get the following: 2010-04-10 04:12:05.263 Microsoft SQL Server Merge Agent 9.00.1399.06 2010-04-10 04:12:05.294 Copyright (c) 2000 Microsoft Corporation 2010-04-10 04:12:05.294 2010-04-10 04:12:05.294 The timestamps prepended to the output lines are express ed in terms of UTC time. 2010-04-10 04:12:05.294 User-specified agent parameter values: -Publisher SUN -PublisherDB PRIMROSE -PublisherSecurityMode 1 -Publication PRIMROSE -Distributor SUN -DistributorSecurityMode 1 -Subscriber PVILLE\SQLEXPRESS -SubscriberSecurityMode 1 -SubscriberDB PRIMROSE -SubscriptionType 1 -DistributorLogin sa -DistributorPassword ********** -DistributorSecurityMode 0 -PublisherLogin sa -PublisherPassword ********** -PublisherSecurityMode 0 -SubscriberLogin sa -SubscriberPassword ********** -SubscriberSecurityMode 0 2010-04-10 04:12:05.325 Connecting to Subscriber 'PVILLE\SQLEXPRESS' 2010-04-10 04:12:05.481 Connecting to Distributor 'SUN' 2010-04-10 04:12:05.513 The version of SQL Server running at the Distributor(10. 0.2531.??????????????????) is not compatible with the version of SQL Server runn ing at the Subscriber(9.00.1399.???????L?L?LHL?L?L?L?,?). 2010-04-10 04:12:05.513 Category:NULL Source: Merge Process Number: -2147200979 Message: The version of SQL Server running at the Distributor(10.0.2531.???????? ??????????) is not compatible with the version of SQL Server running at the Subs criber(9.00.1399.???????L?L?LHL?L?L?L?,?). Any ideas?

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  • User cannot access a system DSN on Windows Server 2008

    - by Ra Osolage
    We run our SQL Server services using a low privileged domain account. That account is NOT a local admin on the OS. Only access I give the user account is assigned during install of SQL: full control over its mount points and then everything else is granted by the SQL Server 2005/2008 installer. I need to create a linked server in SQL Server 2008 to an ODBC data source. So I remoted into the computer using my domain account, which is part of a group that DOES have local admin privs to the OS. I created a system DSN and configured it to connect to another SQL Server. The DSN works perfectly when I test it. However, when I try to create the linked server, I get an error. It appears to me that the DSN is invisible to the domain account that SQL Server is running as. It seems that this problem is only happening to me on Windows 2008 servers. Does anybody know whether there's anything that you need to do after creating a DSN to make it visible for other users to access?

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  • Server configuration advice for new site that could get lots of traffic within 6m

    - by alchemical
    We're setting up a new web2.0 type site with elements of e-commerce. Budget is kind of tight. Due to the nature of the site and promotions, etc., we expect traffic could ramp up fairly quickly. Looking for advice for a good configuration to start with, we' looking to co-lo with CalPop in downtown LA. We've looked at Dell, ABMX.com, and got a quote from CalPop (they make their own servers as they also do managed hosting). Price range has been anywhere from about $1200-$3300 per server. We're thinking to start with a web server and db server, both with mirrored drives. It would be nice to stay under about 2k per server if possible. Min configuration for each would probably be a quad-core with 8GB Ram. Thinking to run Windows Server 2008 R2 (Web Edition?) and SQL Server 2008. Looking for advice on the best server configurations and/or brands that fit the budget, yet will allow us to smoothly scale as traffic increases. Reliability is also pretty important. Also wondering if a switch/router is necessary or useful to connect the two servers.

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  • linked-server sql - access

    - by user22121
    Hi, I have a SQL server 2000 and an Access database mdb connected by Linked server on the other hand I have a program in c # that updates data in a SQL table (Users) based data base access. When running my program returns the following error message: OLE DB provider 'Microsoft.Jet.OLEDB.4.0' reported an error. Authentication failed. [OLE / DB provider returned message: Can not start the application. Missing information file of the working group or is opened exclusively by another user.] OLE DB error trace [OLE / DB Provider 'Microsoft.Jet.OLEDB.4.0' IDBInitialize:: Initialize returned 0x80040E4D: Authentication failed.] . Both the program, the sql server and database access are on a remote server. On the local server the problem was solved by running the following: "sp_addlinkedsrvlogin 'ActSC', 'false', NULL, 'admin', NULL". Try on the remote server the next, without result: "sp_addlinkedsrvlogin 'ActSC', true, null, 'user', 'pass'". On the remote server and from the "Query Analyzer" sql update statements are working correctly. Can you think of what may be the problem? Thanks!

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  • User cannot access a system DSN on Windows Server 2008

    - by Ra Osolage
    We run our SQL Server services using a low privileged domain account. That account is NOT a local admin on the OS. Only access I give the user account is assigned during install of SQL: full control over its mount points and then everything else is granted by the SQL Server 2005/2008 installer. I need to create a linked server in SQL Server 2008 to an ODBC data source. So I remoted into the computer using my domain account, which is part of a group that DOES have local admin privs to the OS. I created a system DSN and configured it to connect to another SQL Server. The DSN works perfectly when I test it. However, when I try to create the linked server, I get an error. It appears to me that the DSN is invisible to the domain account that SQL Server is running as. It seems that this problem is only happening to me on Windows 2008 servers. Does anybody know whether there's anything that you need to do after creating a DSN to make it visible for other users to access?

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  • SQL Server Master class winner

    - by Testas
     The winner of the SQL Server MasterClass competition courtesy of the UK SQL Server User Group and SQL Server Magazine!    Steve Hindmarsh     There is still time to register for the seminar yourself at:  www.regonline.co.uk/kimtrippsql     More information about the seminar     Where: Radisson Edwardian Heathrow Hotel, London  When: Thursday 17th June 2010  This one-day MasterClass will focus on many of the top issues companies face when implementing and maintaining a SQL Server-based solution. In the case where a company has no dedicated DBA, IT managers sometimes struggle to keep the data tier performing well and the data available. This can be especially troublesome when the development team is unfamiliar with the affect application design choices have on database performance. The Microsoft SQL Server MasterClass 2010 is presented by Paul S. Randal and Kimberly L. Tripp, two of the most experienced and respected people in the SQL Server world. Together they have over 30 years combined experience working with SQL Server in the field, and on the SQL Server product team itself. This is a unique opportunity to hear them present at a UK event which will: Debunk many of the ingrained misconceptions around SQL Server's behaviour    Show you disaster recovery techniques critical to preserving your company's life-blood - the data    Explain how a common application design pattern can wreak havoc in the database Walk through the top-10 points to follow around operations and maintenance for a well-performing and available data tier! Please Note: Agenda may be subject to change  Sessions Abstracts  KEYNOTE: Bridging the Gap Between Development and Production    Applications are commonly developed with little regard for how design choices will affect performance in production. This is often because developers don't realize the implications of their design on how SQL Server will be able to handle a high workload (e.g. blocking, fragmentation) and/or because there's no full-time trained DBA that can recognize production problems and help educate developers. The keynote sets the stage for the rest of the day. Discussing some of the issues that can arise, explaining how some can be avoided and highlighting some of the features in SQL 2008 that can help developers and DBAs make better use of SQL Server, and troubleshoot when things go wrong.   SESSION ONE: SQL Server Mythbusters  It's amazing how many myths and misconceptions have sprung up and persisted over the years about SQL Server - after many years helping people out on forums, newsgroups, and customer engagements, Paul and Kimberly have heard it all. Are there really non-logged operations? Can interrupting shrinks or rebuilds cause corruption? Can you override the server's MAXDOP setting? Will the server always do a table-scan to get a row count? Many myths lead to poor design choices and inappropriate maintenance practices so these are just a few of many, many myths that Paul and Kimberly will debunk in this fast-paced session on how SQL Server operates and should be managed and maintained.   SESSION TWO: Database Recovery Techniques Demo-Fest  Even if a company has a disaster recovery strategy in place, they need to practice to make sure that the plan will work when a disaster does strike. In this fast-paced demo session Paul and Kimberly will repeatedly do nasty things to databases and then show how they are recovered - demonstrating many techniques that can be used in production for disaster recovery. Not for the faint-hearted!   SESSION THREE: GUIDs: Use, Abuse, and How To Move Forward   Since the addition of the GUID (Microsoft’s implementation of the UUID), my life as a consultant and "tuner" has been busy. I’ve seen databases designed with GUID keys run fairly well with small workloads but completely fall over and fail because they just cannot scale. And, I know why GUIDs are chosen - it simplifies the handling of parent/child rows in your batches so you can reduce round-trips or avoid dealing with identity values. And, yes, sometimes it's even for distributed databases and/or security that GUIDs are chosen. I'm not entirely against ever using a GUID but overusing and abusing GUIDs just has to be stopped! Please, please, please let me give you better solutions and explanations on how to deal with your parent/child rows, round-trips and clustering keys!   SESSION 4: Essential Database Maintenance  In this session, Paul and Kimberly will run you through their top-ten database maintenance recommendations, with a lot of tips and tricks along the way. These are distilled from almost 30 years combined experience working with SQL Server customers and are geared towards making your databases more performant, more available, and more easily managed (to save you time!). Everything in this session will be practical and applicable to a wide variety of databases. Topics covered include: backups, shrinks, fragmentation, statistics, and much more! Focus will be on 2005 but we'll explain some of the key differences for 2000 and 2008 as well. Speaker Biographies     Kimberley L. Tripp Paul and Kimberly are a husband-and-wife team who own and run SQLskills.com, a world-renowned SQL Server consulting and training company. They are both SQL Server MVPs and Microsoft Regional Directors, with over 30 years of combined experience on SQL Server. Paul worked on the SQL Server team for nine years in development and management roles, writing many of the DBCC commands, and ultimately with responsibility for core Storage Engine for SQL Server 2008. Paul writes extensively on his blog (SQLskills.com/blogs/Paul) and for TechNet Magazine, for which he is also a Contributing Editor. Kimberly worked on the SQL Server team in the early 1990s as a tester and writer before leaving to found SQLskills and embrace her passion for teaching and consulting. Kimberly has been a staple at worldwide conferences since she first presented at TechEd in 1996, and she blogs at SQLskills.com/blogs/Kimberly. They have written Microsoft whitepapers and books for SQL Server 2000, 2005 and 2008, and are regular, top-rated presenters worldwide on database maintenance, high availability, disaster recovery, performance tuning, and SQL Server internals. Together they teach the SQL MCM certification and throughout Microsoft.In their spare time, they like to find frogfish in remote corners of the world.   Speaker Testimonials  "To call them good trainers is an epic understatement. They know how to deliver technical material in ways that illustrate it well. I had to stop Paul at one point and ask him how long it took to build a particular slide because the animations were so good at conveying a hard-to-describe process." "These are not beginner presenters, and they put an extreme amount of preparation and attention to detail into everything that they do. Completely, utterly professional." "When it comes to the instructors themselves, Kimberly and Paul simply have no equal. Not only are they both ultimate authorities, but they have endless enthusiasm about the material, and spot on delivery. If either ever got tired they never showed it, even after going all day and all week. We witnessed countless demos over the course of the week, some extremely involved, multi-step processes, and I can’t recall one that didn’t go the way it was supposed to." "You might think that with this extreme level of skill comes extreme levels of egotism and lack of patience. Nothing could be further from the truth. ... They simply know how to teach, and are approachable, humble, and patient." "The experience Paul and Kimberly have had with real live customers yields a lot more information and things to watch out for than you'd ever get from documentation alone." “Kimberly, I just wanted to send you an email to let you know how awesome you are! I have applied some of your indexing strategies to our website’s homegrown CMS and we are experiencing a significant performance increase. WOW....amazing tips delivered in an exciting way!  Thanks again” 

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  • Passive FTP on Windows Server 2008 R2 using the IIS7 FTP-Server

    - by ntor
    Hello serverFault-community! During the last few days I have been setting up a Windows Server 2008 R2 in a VMware. I installed the standard FTP-Server on it by using the Webserver (IIS)-role. Everything works fine with accessing my FTP-Site with ftp://localhost in Firefox. I can also get access to it via the local IP of my Server. Actually everything works fine in my LAN. But here's my problem: I want to get access "from outside", using the external IP or a dyndns-URL. I have a LinkSys-Router in front of my Server, therefore I'm forwarding all the important ports. If you may now think "this idiot has probably forgotten some ports", I must dissappoint you. It even works getting access to my Server-Website and messing around in some WebInterfaces. The problem is my passive FTP (active works for me). I always get a timeout, when e.g. FileZilla waits for a response to the LIST-command. The one big thing I don't get, is, why my Server sends a response to the PASV-command, naming a port like 40918, even if I have restricted the data port range for my passive FTP ( in the IIS-Manager) to e.g. [5000-5009]. I simply don't want to open and forward all possible data ports! And another thing is, I can't specify a static external IP-adress for my server, since I don't own any. I hope I have explained my problem in a comprehensible way. If not, simply ask by posting a comment! LG ntor PS: I have already mainly tried following articles: Out Of Band FTP 7 shows "Operation timed out" How to Configure Windows Firewall for a Passive Mode FTP Server ServerFault --- Passive ftp on Server 2008 --- EDIT: --- There is one idea rising up in my mind: When I use FileZilla to connect by passive mode I always get something like this: 227 Entering Passive Mode (192,168,1,102,160,86) According to a Rhinosof-article FZ tries to connect on port "160*256+86 = 41046", although I have restricted the data ports (as mentioned above). Could this be caused by the router, that doesn't forward out-ports directly, but uses different ones? (-- The IP-Adress given is the local one, since I'm not able to define a static external in the IIS-Mgr)

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  • Windows Server 2003 Standard - how to access other pc's remotely

    - by studiohack
    I'm a novice in the world of servers, and I'm about to install Windows Server 2003 Standard on a server box I have...However, I'm curious if there is a way to access the other PC's in my network remotely via the server (Windows XP Home and Windows 7 Home Premium)? Like say, I'm at a friend's house, and I want to access my Win7 machine via the server, how do I do it? Is it possible? Thanks!

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  • Outlook 2010 corrupts all Office attachments on a Server 2008R2 Remote Desktop Server

    - by Zhadu
    I have a rather annoying problem with a clients new Remote Desktop server. The problem is that any and all Office attachments (tested with Word and Excel documents) sent to the users via email cannot be opened due to the file seemingly being corrupted/damaged. I have determined that it is a local problem on the server, as the attachments work fine on my own pc. Also I believe the problem is isolated to Outlook, as the users can open already stored Office files without any issues. What are your thoughts on this? Extra information: The server is running Microsoft Server 2008 R2. The Office is a version 2010. It is handeling the roles of AD and RDS - The client only has one server, hence the breach of best practise. There is currently no AV software on the server. I have tried running a repair as well as a reinstalling of Office, with the error still there.

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  • Join Production Server 2008 to 2003 domain

    - by Campo
    I administer a production server for a .com. It is live right now. Server 2008 x64 IIS 7 SQL 2008 PHP MYSQL I have another server which is a DC Server 2003 x86 and a warm standby for the website, sql, DFS, exchange queue. In order to get DFS going to transfer user photos and other content I need it in the domain. My question is, What preparations do I need to do to the production server to allow a smooth transition onto the domain? Things such as permissions for the website. I do not want to be running around resetting all the permissions. The Group Policy on the DC is completely default. Should I add the DNS manually or allow it to add itself? Anything else I left out.

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  • Idea to develop a caching server between IIS and SQL Server

    - by John
    I work on a few high traffic websites that all share the same database and that are all heavily database driven. Our SQL server is max-ed out and, although we have already implemented many changes that have helped but the server is still working too hard. We employ some caching in our website but the type of queries we use negate using SQL dependency caching. We tried SQL replication to try and kind of load balance but that didn't prove very successful because the replication process is quite demanding on the servers too and it needed to be done frequently as it is important that data is up to date. We do use a Varnish web caching server (Linux based) to take a bit of the load off both the web and database server but as a lot of the sites are customised based on the user we can only do so much. Anyway, the reason for this question... Varnish gave me an idea for a possible application that might help in this situation. Just like Varnish sits between a web browser and the web server and caches response from the web server, I was wondering about the possibility of creating something that sits between the web server and the database server. Imagine that all SQL queries go through this SQL caching server. If it's a first time query then it will get recorded, and the result requested from the SQL server and stored locally on the cache server. If it's a repeat request within a set time then the result gets retrieved from the local copy without the query being sent to the SQL server. The caching server could also take advantage of SQL dependency caching notifications. This seems like a good idea in theory. There's still the same amount of data moving back and forward from the web server, but the SQL server is relieved of the work of processing the repeat queries. I wonder about how difficult it would be to build a service that sort of emulates requests and responses from SQL server, whether SQL server's own caching is doing enough of this already that this wouldn't be a benefit, or even if someone has done this before and I haven't found it? I would welcome any feedback or any references to any relevant projects.

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