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  • MSSQL error: consistency-based I/O error - can it be caused by an MSSQL or OS problem?

    - by Philipp Keller
    This is what I saw in the windows error log: SQL Server detected a logical consistency-based I/O error: incorrect checksum (expected: 0x19fedd20; actual: 0x19fed5e3). It occurred during a read of page (1:1764) in database ID 6 at offset 0x00000000dc8000 in file 'D:\mssql\local_repository_pbdiffimport.mdf'. Additional messages in the SQL Server error log or system event log may provide more detail. This is a severe error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many factors; for more information, see SQL Server Books Online. I ran dbcc checkdb which told me I should restore with option REPAIR_ALLOW_DATA_LOSS, so I eventually ran DBCC CHECKDB (my_db_name, REPAIR_ALLOW_DATA_LOSS) WITH NO_INFOMSGS But that resulted in about 2'000 rows being lost. I restored a backup but now I'm afraid this will happen again since we already had a consistency problem in the same database about 2 weeks ago but then it happened in an index (recreated indexes solved the problem). We have investigated the discs - RAID5 looks good, no errors, and also none of the disc-check-utilities have revealed any hardware problem. Can this be caused by OS (Windows Server 2003) or by MSSQL (MSSQL Server 2005)?

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  • Email sent from Centos end up in user spam folder

    - by oObe
    I am facing this issue, I use the default postfix MTA in centos but the mail end up in user spam folder, but this does not seem to be a problem in Debian using exim4, both host have hostname and domain name configured, and relay mail through external smtp host. Both configuration and recieving email header are attached. The different seems that Debian has this additional (envelope tag) and (from) tag other than some minor syntax differences. Any help to resolve is appreciated. The IP address and DNS is masked as follow: 1.2.3.4 = My IP address smtp.host.com = external smtp host for my company [email protected] = account at smtp host centos.abc.com = Local centos server debian.abc.com = Local debian server Thanks. Centos main.cf config with the following params configured myhostname = centos.abc.com mydomain = abc.com myorigin = centos.abc.com relayhost = smtp.host.com Centos - User receiving mail header Return-Path: <[email protected]> Received: from 1.2.3.4 [1.2.3.4] by smtp.host.com with SMTP; Thu, 27 Sep 2012 13:36:49 +0800 Received: by centos.abc.com (Postfix, from userid 0) id 1E0637B89; Fri, 28 Sep 2012 13:36:39 +0800 (SGT) Return-Path: <[email protected]> Received: from 1.2.3.4 [1.2.3.4] by smtp.host.com with SMTP; Thu, 27 Sep 2012 13:36:49 +0800 Received: by centos.abc.com (Postfix, from userid 0) id 1E0637B89; Fri, 28 Sep 2012 13:36:39 +0800 (SGT) Date: Fri, 28 Sep 2012 13:36:39 +0800 To: [email protected] Subject: Test mail from centos User-Agent: Heirloom mailx 12.4 7/29/08 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: <[email protected]> From: [email protected] (root) X-SmarterMail-TotalSpamWeight: 0 X-Antivirus: avast! (VPS 120926-1, 27/09/2012), Inbound message X-Antivirus-Status: Clean http://i.imgur.com/7WAYX.jpg Debain exim4 config .... # This is a Debian specific file dc_eximconfig_configtype='smarthost' dc_other_hostnames='debian.abc.com' dc_local_interfaces='127.0.0.1 ; ::1' dc_readhost='debian.abc.com' dc_relay_domains='smtp.host.com' dc_minimaldns='false' dc_relay_nets='127.0.0.1' dc_smarthost='smtp.host.com' CFILEMODE='644' dc_use_split_config='false' dc_hide_mailname='true' dc_mailname_in_oh='true' dc_localdelivery='mail_spool' debian - User receiving mail header Return-Path: <[email protected]> Received: from 1.2.3.4 [1.2.3.4] by smtp.host.com with SMTP; Thu, 27 Sep 2012 15:02:53 +0800 Received: from root by debian.abc.com with local (Exim 4.72) (envelope-from <[email protected]>) id 1TH86d-00010v-G9 for [email protected]; Thu, 27 Sep 2012 15:01:55 +0800 Return-Path: <[email protected]> Received: from 1.2.3.4 [1.2.3.4] by smtp.host.com with SMTP; Thu, 27 Sep 2012 15:02:53 +0800 Received: from root by debian.abc.com with local (Exim 4.72) (envelope-from <[email protected]>) id 1TH86d-00010v-G9 for [email protected]; Thu, 27 Sep 2012 15:01:55 +0800 Date: Thu, 27 Sep 2012 15:01:55 +0800 Message-Id: <[email protected]> To: [email protected] Subject: Test from debian From: root <[email protected]> X-SmarterMail-TotalSpamWeight: 0 X-Antivirus: avast! (VPS 120926-1, 27/09/2012), Inbound message X-Antivirus-Status: Clean http://imgur.com/nMsMA.jpg

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  • Connect to development server via switch?

    - by letseatfood
    I apologize upfront if this isn't appropriate for superuser. I asked it on serverfault and was told it was too general for that site. I have a laptop with Vista and it receives it's internet connection wireless. I have an old desktop with Ubuntu 10.04 Server Edition installed and it is setup as a development server with Apache, MySQL, and PHP. This works well, with the server having a static IP address. The server is connected to the router via an Ethernet cable. Is it possible to disconnect the cable that is currently connecting the server and the router, then connect the server and workstation to a switch, so that I am still able to connect to the server via web browser from the workstation? I am trying to eliminate the long ethernet cable connecting the server to the router in the other room. I already have a switch, that is why I asked specifically about it. Thanks and I will be more than happy to clarify!

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  • DNS SERVFAIL and NXDOMAIN on specific hostname

    - by David George
    I have two DNS servers in my domain, Windows 2003 and Windows 2008, but recently both are failing to route users to www.cdw.com. I have had no other complaints with any other websites, but when trying to use cdw.com the page never loads. I tried to resolve the hostname and get the NXDOMAIN error below: MyComputer:~ me$ nslookup cdw.com ;; Got SERVFAIL reply from 192.168.2.1, trying next server Server: 192.168.2.2 Address: 192.168.2.2#53 ** server can't find cdw.com: NXDOMAIN MyComputer:~ me$ nslookup serverfault.com Server: 192.168.2.2 Address: 192.168.2.2#53 Non-authoritative answer: Name: serverfault.com Address: 198.252.206.16

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  • join ubuntu server 11.10 to a windows server dns

    - by eyadof
    i have been installed ubuntu server 11.10 and i doesn't specify the domain name during the installation but after i have been edit /ete/resolve.conf with my dns servers which run windows server the dns can't recognise my server name . then i installed likewise-open but that doesn't solve the problem and make some problems with ftp . can someone help me please to join this server to the dns . thanks in advance .

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  • long access times and errors in iis application

    - by Jens Olsson
    Hi, I am having an issue with an IIS application (details of environment at the end of the message). The web site works great most of the time and I cannot reproduce any error in our test system. On the live system however with on averare of 5-15 requests per second I have a problem with that some requests (about 0.05%) will take over 300 seconds to complete. The other requests complete withing 5-10 seconds. It seem like if all the errornous requests end up with a Timer_EntityBody error in the error log. I have never seen this as an end user but I guess that they will receive some kind of error message. I am trying to find out what can be causing this errornous behaviour. Any ideas are welcome. I have read something about that there can be an MTU issue if ICMP and MTU protocols are blocked in the firewall. Does that sound reasonable? I have also read about updating to IIS 7 should do the trick. Does it sound reasonable? I think that the problem has another cause but I have no idea of what. I have tried running hte perormance monitor, monitoring for database locks and active transaction counts. I can see some of these in the perfmon log for the MSSQL server (another machine) for example: Active transactions is sometimes peaking and sometimes for long periods Lock waits per seconds is sometimes peaking Transactions per second is sometimes peaking Page IO Latch wait is sometimes peaking Lock wait time (ms) is sometimes peaking But I cannot see that any of these correlate to the errors in the IIS error log. On the IIS server machine I can also see with perfmon that some values peak a few times during a day: Request execution time Avg disk queue length I can neither see that any of these correlate to the errors in the IIS error log. In the below code I have anonymized by replacing some parts with HIDDEN The following can be seen in the access log 2010-10-01 08:35:05 W3SVC1301873091 **HIDDEN** POST /**HIDDEN**/Modules/BalanceModule.aspx - 80 - **HIDDEN** Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+5.1;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.4506.2152;+.NET+CLR+3.5.30729;+.NET4.0C;+.NET4.0E) ASP.NET_SessionId=**HIDDEN** 400 0 64 0 2241 127799 At the same time the following can be seen in the error log: 2010-10-01 08:35:05 **HIDDEN** 1999 **HIDDEN** 80 HTTP/1.0 POST /**HIDDEN**/Modules/BalanceModule.aspx - 1301873091 Timer_EntityBody Test+Pool I can tell the following about the environment: Server: Windows Server 2003 x64 SP2 running on VMWare HTTP Server: IIS v6.0 with ASP.NET 2.0.50727 Antivirus: Trend Micro OfficeScan (Is it a good idea to have this on a server?)

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  • Domain Trust 2008 to 2003

    - by nick3216
    I'm having trouble setting up the trust relationship between a Windows Server 2003 and a Windows Server 2008 AD. Domain a is Windows Server 2003 Forest functional level. Domain b is a Windows Server 2008 Forest functional level. I can set up the incoming side of the trust relationship on domain "a" so that it trusts domain "b". Try as I might on domain "b" I can't set up the outgoing side of the trust relationship to domain "a". The GUI interface gives an unhelpful 'The request is not supported'. I'm not sure netdom is being more or less helpful as it refers me to FilterSIDs netdom trust /add b /uo:b\admin /po:* /d:a /ud:a\admin /pd:* /oneside:trusting To improve the security of this external trust, security identifier (SID) filtering is enabled, however, if users have been migrated to the trusted domain and their SID histories have been preserved, you may choose to turn off this feature. For more information about SID filtering and how to turn it off, see the help for netdom trust /FilterSids or see Help and Support. The request is not supported. The command failed to complete succesfully. I say 'less helpful' because Windows Server 2008 doesn't support the /FilterSIDs option. How can we force creation of this trust? Edit: Just to clarify I've checked that the [Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options] "Network access: Allow anonymous SID/Name translation” is enabled on both sides of the trust as per http://social.technet.microsoft.com/Forums/en/winserverDS/thread/cc61fc25-3569-4413-bbfd-92390eb31118

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  • C# sends SQL data 4 times less from one box than from another

    - by Bobb
    W2003, .NET 3.5, SQL 2008 I have prod and UAT app servers deployed in 2 different data centres. I have a C# app which reads text file, parse the text and sends the data to the SQL in bulk. SQL server is in US and the app servers are in London (but in different places). All POPs have dedicated network connections. There is no public internet involved. When the app runs on UAT server I can see in Perfmon that the Send byte/sec is x4 higher than from production server. My estimate is that one server outputs at 1 MB/s and the other at 250 KB/s rate. My suspicion immediately is that there is a router on one of the DCs which shapes traffic or does QoS limitation on traffice from London to US. However support and Windows team and networkig team all are saying that there are no differences in neither networking config on the 2 DCs nor NIC config on the 2 app server... How to find out why is the networking bottlneck is 4 times tighter in one place than in the other? What can I do about it?

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  • Terminal services and screen savers

    - by Corsair
    I have a Window Server 2008 R2 server acting as a terminal server for mobile devices running a single application, but I am having issues with the screen saver popping on after ten minutes. Is there a setting in terminal services to make the screensaver settings universal? If not, how should I approach this issue?

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  • Windows file server access control by device

    - by Ori Shavit
    I'm trying to build a system where access to certain resources (file shares) in Windows Server, is limited not only by the username (in a Active Directory domain), but also by the client machine. So far, I haven't found a good way to do this; adding the computer account to the DACL is apparently not the way to do it. Windows Server 2012 supports this with Dynamic Access Control, but this method requires all clients to be Windows 8, it seems, with no way to use this with Windows 7 clients. Is there a supported way to do this? (or alternatively, add support for device authorization with Windows 7).

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  • Virtualizing Firewalls/UTM

    - by TheD
    So Sophos UTM (Astaro Gateway UTM) can be virtualized in Hyper-V, VMWare, vSphere etc. Now I'm new to virtualization, so am wondering how the networking would be configured in this situation. Imagine the following (a very simple setup). A Zyxel router acting as the default gateway, standard ADSL line. This is connected directly via Ethernet to my VHost, Hyper-V in my case. Now I assume I need two virtual network adapters, one which is the "External" interface to the firewall, and the other being the "Internal" interface. But where does my switch go, since I have 5 machines (or X number of machines). Where is the switch connected, to the internal interface on the VHost? What default gateway do my clients use etc? How would the routing work if these two interfaces weren't bridged since they are virtual networks anyway. I'm a little confused! Any advice is much appreciated! Cheers

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  • Connecting two servers together - How to?

    - by Chris
    Is it possible to connect two servers running for example Windows Server 2003/2008 together. For example they are seen on the network as one server with the combination of all HDD from each server? Example: \\Server1 - 1 x 1tb hdd \\Server2 - 1 x 1tb hdd I would like users of the network to be able to store their documents on both servers for load balancing. So basically a RAID between the two servers? Any help would be appreciated.

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  • Is there a way to import a scheduled task from windows 2003 (.job) to windows 2008 (.xml)?

    - by Rodrigo
    I had some jobs to be moved from the old production server (windows 2003 server standard) to the new machine (windows 2008 server standard), but the new server is unable to read the old .job format, also the import wizard only imports from .xml job files (same version). Obviously I don't want to rebuild all the jobs by hand, but can't find a tool that makes the process a very little easier. I don't trust in Microsoft for this kind of tools, my previously experiences had been to bad (DTS - SSIS). Any ideas? Thanks in advance.

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  • Migration from Distributed File System 2003 to 2008

    - by miro23
    I have two Windows Server 2003 and both have DFS and it does replication between them. I would like to migrate the primary win2k3 DFS server to win2k8. what is the best way to do that? I found this article: Migrate a Domain-based Namespace to Windows Server 2008 Mode http://technet.microsoft.com/en-us/library/cc753875.aspx But I am interested only on migrating the DFS replication and not the namespace. Thanks.

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  • Strange RDP / Remote Desktop problem

    - by John Landheer
    I'll try to be as specific as I can be: Server is running SBS 2008 R2 (with all updates) Server is connected to the internet Server has 2 NIC's, one is disabled Server is running RDP Service (accessible directly from the internet, I know, not as secure as it should be) Computers A and B are on the same local net. Computers A and B are both Windows 7. Users X and Y are both admins on the server Computer A can connect as user X to the server with mstsc Computer A can connect as user Y to the server with mstsc Computer B can connect as user X to the server with mstsc computer B CANNOT connect as user Y to the server with mstsc! The last point is the problem, I get an authentication error. This used to work flawlessly for the last year. The server and desktops have been rebooted. I find it very strange....

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  • DBCC CHECKDB fails and quits job, ambiguous error message.

    - by ddono25
    I received a notice that one of our servers' DBCC CHECKDB for all databases has been failing the past four times it has been run. We don't have any data prior to that, but it doesn't look like it has been succeeding for awhile. There are no errors in the log file only: DBCC results for 'sys.sysxmlfacet'. [SQLSTATE 01000] Msg 0, Sev 0, State 1: Unspecified error occurred on SQL Server. Connection may have been terminated by the server. [SQLSTATE HY000] There are 112 rows in 1 pages for object "sys.sysxmlfacet". [SQLSTATE 01000] I ran a DBCC CHECKDB using sp_MSForEachDB to get more accurate results and had the same error on the same DB but at a separate point: DBCC results for 'NameValuePair_Greek_CI_AS'. [SQLSTATE 01000] Msg 0, Sev 0, State 1: Unspecified error occurred on SQL Server. Connection may have been terminated by the server. [SQLSTATE HY000] There are 0 rows in 0 pages for object "NameValuePair_Greek_CI_AS". [SQLSTATE 01000] Also, the error-log states that the DBCC completed without errors for this database. I can't figure out how to track down this ambiguous issue that only happens on this database out of the dozens on this server. Any help is appreciated!

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  • sql server uninstallation issue

    - by angel
    I'm unable to remove SQL Server 2008 sp1 completely from my system. I'm using windows 7 ultimate. Everytime I try uninstalling it i get the following error. How can I remove it? here is the log: Overall summary: Final result: Failed: see details below Exit code (Decimal): -2068643839 Exit facility code: 1203 Exit error code: 1 Exit message: Failed: see details below Start time: 2013-06-24 21:10:38 End time: 2013-06-24 21:21:17 Requested action: Uninstall Log with failure: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20130624_210908\sql_rs_Cpu64_1.log Exception help link: http://go.microsoft.com/fwlink?LinkId=20476&ProdName=Microsoft+SQL+Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=10.0.1600.22 Machine Properties: Machine name: ABHI-PC Machine processor count: 4 OS version: Windows Vista OS service pack: Service Pack 1 OS region: United States OS language: English (United States) OS architecture: x64 Process architecture: 64 Bit OS clustered: No Product features discovered: Product Instance Instance ID Feature Language Edition Version Clustered Sql Server 2008 MSSQLSERVER MSRS10.MSSQLSERVER Reporting Services 1033 Enterprise Edition 10.0.1600.22 No Sql Server 2008 Management Tools - Basic 10.0.1600.22 No Package properties: Description: SQL Server Database Services 2008 SQLProductFamilyCode: {628F8F38-600E-493D-9946-F4178F20A8A9} ProductName: SQL2008 Type: RTM Version: 10 SPLevel: 0 Installation edition: ENTERPRISE User Input Settings: ACTION: Uninstall CONFIGURATIONFILE: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20130624_210908\ConfigurationFile.ini FEATURES: RS,SSMS,SNAC_SDK,CE_RUNTIME,CE_TOOLS,SNAC HELP: False INDICATEPROGRESS: False INSTANCEID: INSTANCENAME: MSSQLSERVER MEDIASOURCE: QUIET: False QUIETSIMPLE: False X86: False Configuration file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20130624_210908\ConfigurationFile.ini Detailed results: Feature: SQL Client Connectivity Status: Skipped MSI status: Passed Configuration status: Passed Feature: SQL Client Connectivity SDK Status: Skipped MSI status: Passed Configuration status: Passed Feature: Reporting Services Status: Failed: see logs for details MSI status: Passed Configuration status: Failed: see details below Configuration error code: 0xFFD65603 Configuration error description: Input string was not in a correct format. Configuration log: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20130624_210908\Detail.txt Feature: SQL Compact Edition Tools Status: Passed MSI status: Passed Configuration status: Passed Feature: SQL Compact Edition Runtime Status: Skipped MSI status: Passed Configuration status: Passed Feature: Management Tools - Basic Status: Failed: see logs for details MSI status: Passed Configuration status: Passed Rules with failures: Global rules: There are no scenario-specific rules. Rules report file: C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20130624_210908\SystemConfigurationCheck_Report.htm

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  • Mail Server on Google Apps, Hotmail Blocks

    - by detay
    My company provides private research tools (sites) for companies. Each site has its own domain name and users. These sites need to be able to send outbound mail for notifications such as password reminders. We started using Google Apps for this purpose, but lately we are having tremendous problems with mailing, especially to hotmail. I added the SPF record as required. Mxtoolbox says my domains are not in any blacklists. I was told to contact https://postmaster.live.com/snds/addnetwork.aspx and add my network. Given that I am using google's mail servers for sending mail, should I add their IP address for registering my domain? Or should I add my server's IP even though I am not hosting the mail server on it? Here's an example of a returned message; > Delivered-To: [email protected] Received: by 10.112.1.195 with SMTP > id 3csp62757lbo; > Mon, 10 Dec 2012 10:42:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; > d=gmail.com; s=20120113; > h=mime-version:from:to:x-failed-recipients:subject:message-id:date > :content-type; > bh=x41JiCH75hsonh+5c/kzwIs7R8u4Hum2u396lkV3g2w=; > b=v+bBPvufqfVkNz2UrnhyyoGj1Cuwf6x/yMj0IXJgH27uJU7TqBOvbwnNHf33sQ7B9T > uGzxwryC2fmxBh72cGz1spwWK348nUp6KK73MXKnF8mpc3nPQ8Ke+EQpSPeJdq/7oZvd > scZTGpy//IiGEUDU5bJ7YPqYXQRycY5N6AF5iI4mWWwbS4opybp3IKpDDktu11p/YEEO > Fj9wnSCx3nLMXB/XZgSjjmnaluGhYNdh3JFtz83Vmr50qXTG/TuIXlkirP73GfGvIt2S > 7sy8/YdEbZR92mYe9wucditYr7MOuyjyYrZYCg+weXeTZiJX1PfBVieD+kD9MnCairnP > rQeQ== Received: by 10.14.215.197 with SMTP id e45mr52766237eep.0.1355164974784; > Mon, 10 Dec 2012 10:42:54 -0800 (PST) MIME-Version: 1.0 Return-Path: <> Received: by 10.14.215.197 with SMTP id > e45mr65950764eep.0; Mon, 10 Dec 2012 10:42:54 -0800 (PST) From: Mail > Delivery Subsystem <[email protected]> To: > [email protected] X-Failed-Recipients: ********@hotmail.fr > Subject: Delivery Status Notification (Failure) Message-ID: > <[email protected]> Date: Mon, 10 Dec 2012 > 18:42:54 +0000 Content-Type: text/plain; charset=ISO-8859-1 > > Delivery to the following recipient failed permanently: > > *********@hotmail.fr > > Technical details of permanent failure: Message rejected. See > http://support.google.com/mail/bin/answer.py?answer=69585 for more > information. > > ----- Original message ----- > > Received: by 10.14.215.197 with SMTP id > e45mr52766228eep.0.1355164974700; > Mon, 10 Dec 2012 10:42:54 -0800 (PST) Return-Path: <[email protected]> Received: from WIN-1BBHFMJGUGS ([91.93.102.12]) > by mx.google.com with ESMTPS id l3sm26787704eem.14.2012.12.10.10.42.53 > (version=TLSv1/SSLv3 cipher=OTHER); > Mon, 10 Dec 2012 10:42:54 -0800 (PST) Message-ID: <[email protected]> MIME-Version: 1.0 > From: [email protected] To: *********@hotmail.fr Date: Mon, 10 Dec > 2012 10:42:54 -0800 (PST) Subject: Rejoignez-nous sur achbanlek.com > Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: > base64 > > ----- End of message -----

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  • Is there a way to import a scheduled task from windows 2003 (.job) to windows 2008 (.xml) ?

    - by Rodrigo
    I had some jobs to be moved from the old production server (windows 2003 server standard) to the new machine (windows 2008 server standard), but the new server is unable to read the old .job format, also the import wizard only imports from .xml job files (same version). Obviously I don't want to rebuild all the jobs by hand, but can't find a tool that makes the process a very little easier. I don't trust in Microsoft for this kind of tools, my previously experiences had been to bad (DTS - SSIS). Any ideas? Thanks in advance.

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  • WMIprvse process leaks memory on 2008 server R2

    - by Dani Fischer
    I have a Windows 2008 R2 server running on a VM machine. My .NET service is running on this server periodically querying WMI, for example: SELECT ProcessId FROM Win32_Service WHERE ... After a day or two WMIprvse takes up to 500M memory and WMI queries start getting out of memory exceptions. This article seems to be talking about this issue: "http://support.microsoft.com/kb/958124" I've seen other articles saying that Microsoft is aware of the problem and not going to issue a fix until the next major release. http://social.msdn.microsoft.com/Forums/en/netfxbcl/thread/256eb40c-d050-4278-a3d8-863e30db02a0 I'd appreciate any suggestions and insights on this.

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  • Why the server is not responding?

    - by par
    Hello! Our server occasionally refuses to serve a simple HTML page. This is happening during a relatively high number of requests. However, the processor is not heavy loaded and there are a lot of free memory. The error seems to occure 1 out of 50 requests in average, depending on the server load. I need to find the source of the problem and take the appropriate actions to eliminate it. I have a suspicion that the problem source is a huge number of incoming network packets. There are 5000 packets per second on average. Traffic - 2 MBits/sec Can this be the cause of the error? There is an interesting thing, in case the server fails to respond, the request string is not logged to access.log by Apache. The error is repeatable from several client computers. DNS is not involved, since I have accessed the server by the IP. I have profiled the problem case with tcpdump utility. These are the good and bad sessions traced by tcpdump. The request is the same in both experiments. Good - server returns response. Bad - no response, time-out error. ---- Bad ---- 12:23:36.366292 IP 123.45.67.890.61749 > myserver.superbservers.com.www: S 2125316338:2125316338(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK> 12:23:39.362394 IP 123.45.67.890.61749 > myserver.superbservers.com.www: S 2125316338:2125316338(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK> 12:23:45.365567 IP 123.45.67.890.61749 > myserver.superbservers.com.www: S 2125316338:2125316338(0) win 8192 <mss 1460,nop,nop,sackOK> -------- ---- Good ---- 12:27:07.632229 IP 123.45.67.890.63914 > myserver.superbservers.com.www: S 3581365570:3581365570(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK> 12:27:10.620946 IP 123.45.67.890.63914 > myserver.superbservers.com.www: S 3581365570:3581365570(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK> 12:27:10.620969 IP myserver.superbservers.com.www > 123.45.67.890.63914: S 2654770980:2654770980(0) ack 3581365571 win 5840 <mss 1460,nop,nop,sackOK,nop,wscale 6> 12:27:10.838747 IP 123.45.67.890.63914 > myserver.superbservers.com.www: . ack 1 win 4380 12:27:10.957143 IP 123.45.67.890.63914 > myserver.superbservers.com.www: P 1:213(212) ack 1 win 4380 12:27:10.957152 IP myserver.superbservers.com.www > 123.45.67.890.63914: . ack 213 win 108 12:27:10.965543 IP myserver.superbservers.com.www > 123.45.67.890.63914: P 1:630(629) ack 213 win 108 12:27:10.965621 IP myserver.superbservers.com.www > 123.45.67.890.63914: F 630:630(0) ack 213 win 108 12:27:11.183540 IP 123.45.67.890.63914 > myserver.superbservers.com.www: . ack 631 win 4222 12:27:11.185657 IP 123.45.67.890.63914 > myserver.superbservers.com.www: F 213:213(0) ack 631 win 4222 12:27:11.185663 IP myserver.superbservers.com.www > 123.45.67.890.63914: . ack 214 win 108 -------- Hoster: SuperbHosting OS: Ubuntu Server parameters: E6300 CONROE 1.86GHZ 2 X 1MB CACHE 1066 1GB DDR2 667MHZ This is a link to apache configuration file we use http://repkin5.snow.prohosting.com/apache.txt This is server-status report taken right after time-out error. http://repkin5.snow.prohosting.com/server-status.htm There are only 10 Child Servers running out of 120, so enough space for new requests. VMSTAT procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 8900 725900 8468 65684 0 0 5 18 11 33 4 3 92 1

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  • split virtualization design based on environment or server role?

    - by Dan
    I'm setting up the server environment for a new software development group, which will include 4 test environments. These are web applications, so each environment will have an application server and a database server. I'm planning on buying two physical servers (e.g. 6-core CPU each with 12GB or so of RAM), and I'm thinking virtualization is appropriate here. With that in mind, I've thought of a couple ways that I could organize the virtualization strategy: - Separated by server role: Server 1 has all the application servers, each in their own guest VM. Server 2 has all the databases. OR - Separated by environment: Server 1 has a VM for two of the environments, with the VM containing both the app server and the database server. Server 2 would also contain two test environments, with the same style (app server and database in same VM). The advantages I see with all the app servers on one server and all the databases on another server is that I could probably be more efficient with the database server (one instance running multiple databases). But the other option seems easier to manage (archives/restorations would be contained in a single VM). Any recommendations? TIA.

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  • File server share access intermittent/slow/machine unstable: win2k8r2

    - by Jack B.
    I have a file server running Win2k8R2 on an older HP DL380G4. It has nothing set up on it other than file sharing. All drivers/firmware/updates installed. The file server is used as a dump for a bunch of test machines - so essentially a lot of small files are being written to it. It was working fine until it started showing the following symptoms: Shares became either very slow/intermittent or could not access them at all. Logging in the the server, you could use it like normal but windows would start freezing and eventually you had to hard reboot it because nothing was responsive. After rebooting, it would work fine for 20min-2hours and then degrade into this broken state again. Some info after investigation: HP Raid Config utility shows the Raid array as functioning properly (RAID5 btw). Event log shows a bunch of DoS attacks from the test machines, saying it has disconnected the connection a. AFAIK (not part of my job) the test machines haven't changed the way they log information to this server or the amount of them hasn't increased. b. Nothing is infected, this server was scanned fully, and the test machines are re-imaged almost daily. Nothing in performance monitor shows as anything being pegged at maximum (CPU/HD/Network/RAM) I installed MS Network Monitor and it is showing a lot of traffic The server was using one gigabit Ethernet connection, I connected the second one as well with the same results. Forgot to add - one of the commonly written to dirs on the share has over 16k subdirs in it, with a crapton of small files within those dirs. Some of the OS instability was slow access to the drive which has this directory - perfmon doesn't show much activity on the HD though so I'm not sure if this crowded dir is the cause. Here is one important fact: I ran into this issue 2-3 months ago, couldn't figure it out, but I had a spare identical machine so I swapped them out (thought it was related to the machine), and now I have the same issue. Also, the computer will be stable if I turn off file sharing. So is the server just getting DoS'd by the test machines? I've never dealt with such an issue. Is instability in the server's OS common when getting DoS'd? Is there anything I can do to confirm this before telling the owners of the test machines to optimize their traffic? (I'm not sure what they'll be able to do). Is there something within Win2k8R2 that can balance the traffic across the two NICs? Any help would be appreciated. Update: Another thought - the drive with the share is RAID5 across 6 SCSI320 300GB HDs. They are near full capacity about 100GB from 1TB left. Could the amount of tiny files could be causing some weirdness with the parity in this array? I think I've read something about this in the past but I'm no expert on RAID.

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  • Tables in the SQL Server "master" database, will they cause problems?

    - by pepoluan
    Folks, please be kind on me... I'm just an 'accidental' DBA due to our DBA resigned, so I'm totally a newbie in DBA... You see, I have this application, "ESET Remote Administration Server" (ERAS) that stores its logs and analysis on (originally) a local Access database. The decision was to migrate its database to a SQL Server 2008 R2 machine. ESET (the maker of the software) helpfully provided tools to perform such migration; unfortunately, being the DBA neophyte that I am, I didn't realize that I have to first create my own database (on the SQL Server side) and assign that database as the 'default' database for ERAS' ODBC connection. Now, the migration tool had successfully created a whole bunch of tables inside the "master" database. My questions: Should I leave things be as it is, or should I re-migrate the ERAS database to a different database? If you suggest me perform a re-migration, my plan is to (1) create a new instance, (2) create a new database within the new instance, (3) create a new ODBC System DSN on the ERAS server pointing to the new DB in step 2, (4) use ESET's migration tool to migrate from the current DSN to the new DSN. Do you think I missed a step there? Thanks beforehand for any guidance.

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