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  • Database checksum features - redundant? useful?

    - by Eloff
    Just about every mainstream DB has a feature to calculate checksums per page, per sector, or per record. Now for a DB that does full recover after any crash, like PostgreSQL, is a checksum even useful? There will be no data loss as long as the xlog is ok, no matter what kind of corruption happened to the data itself, as the redo log is replayed every committed transaction will be restored. So checksums are useless on restore. Doesn't the filesystem or disk keep checksums anyway to detect corruption? So unless the checksum is per record, all it does is tell you there is corruption - which the OS should be yelling at you the minute you try to read it - so useless in operation? I can't imagine how a checksum can be helpful in any sane database - but since they all use them - I'd say that's just failure of imagination on my part. So how is it useful?

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  • MSSQL Auditing Recomendations

    - by Josh Anderson
    As an aspiring DBA, I have recently been asssigned the task of implementing the tracking of all data changes in the database for a peice of software we are developing. After playing with microsoft's change data capture methods, Im looking into some other solutions. We are planing to distribute our product as a hosted solution and unlimited installations would be desired for maximum scalability. Ive looked at IBM's Guardium as well as DB Audit by SoftTree. Im curious if anyone has any solutions they may have used in the past or possibly any suggestions or methods to achieve complete, and of course cost effective, auditing of data changes.

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  • PostgreSQL won't start anymore

    - by Sander Declerck
    Today, my PostgreSQL doesn't start anymore on my windows machine... I've tried to start the service in windows services and got the following error: Windows could not start the PostgreSQL Database Server 8.3 service on Local Computer. Error 1053: The service did not respond to the start or control request in a timely fashion. Then I went to the command line to manually start C:/Program Files (x86)/PostgreSQL/8.3/bin/psql.exe, and then I got this error: psql: Could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "???" and accepting TCP/IP connections on port 5432? Edit: I found this in the logs: 2011-04-22 13:13:16 CEST LOG: could not receive data from client: No connection could be made because the target machine actively refused it. 2011-04-22 13:13:16 CEST LOG: unexpected EOF on client connection

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  • create assembly from network location

    - by mjw06d
    The error I'm receiving: CREATE ASSEMBLY failed because it could not open the physical file "\\<server>\<folder>\<assembly>.dll": 5(Access is denied.). TSQL: exec sp_configure 'clr enabled', 1 reconfigure go create assembly <assemblyname> from '\\<server>\<folder>\<assembly>.dll' with permission_set = safe How can I create an assembly from a unc path?

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  • Reporting Services 2008 Service Account error

    - by Praesagus
    I saved over the encryption key backup file when changing from one account to another. Now I can't see reports, change accounts, or use any of the Encryption key tools in the configuration manager. I receive a "Creating Encryption Key Backup" error 0x80090016. Does anyone know how to fix this? Many thanks in advance.

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  • Can not access SQLServer database

    - by btrey
    I'm trying to convert an Access database to use a SQLServer backend. I've upsized the database and everything works on the server, but I'm unable to access it remotely. I'm running SQLServer Express 2005 on Windows Server 2003. The server is not configured as a domain controller, nor connected to a domain. The computers I'm trying to access the server from are part of a domain, but there are no local domain controllers. I'm at a remote location and the computers are configured and connected to the domain at the home office, then shipped to us. We normally log in with cached credentials and VPN into the home office when we need to access the domain. I can use Remote Desktop Connection to access the 2k3 server which is running SQLServer. If I log into the server with my username, I can bring up the database, access it via the Trusted Connection, and the database works. If I try to run the database locally, however, I get the Server Login dialog box. I can not use a Trusted Connection because my local login is to the home office domain and is not recognized by the SQLServer machine. If I try to use the username/password that is local to the SQLServer, I get a login failed error. I've tried entering the username as "username", "workgroup/username" (where "workgroup" is the name of the workgroup on the SQLServer), "sqlservername/username" and "[email protected]" where "1.2.3.4" is the IP of the SQLServer. In all cases, I get a login failed error. As I said, I can login to the server via Remote Desktop Connection with the same username and password and use the database, so permissions for the username appear to be correct for both a remote connection and for database access. Not sure where to go from here and any assistance would be appreciated.

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  • How do I delete a differential backup?

    - by BlueMonkMN
    I often like to create backups when testing the software I work on, and will sometimes create a differential backup if I want to be able to get back to multiple previous states. However, sometimes I realize that I forgot one thing I wanted to include in a differential backup, or I no longer need a previous differential backup. Sometimes I simply want to create a new scenario from the original base image and start working with a new series of differential backups. So I'd like to be able to delete some older differential backups so I don't get confused about which ones I'm using. But I can't find any way to delete just the differential backups, selectively or all at once.

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  • SqlServer2005 Enterprise Fast Recovery, SqlAgent Availability, and Replication

    - by automatic
    I have a database under SqlServer2005 Enterprise 64bit sp3, that is in phase 3 of 3 of recovery after a reboot without normal shutdown. It looks like with fast Recovery, the database became available when recovery moved into phase 3. However, it seems (based on message in SqlAgent log), that SqlAgent is "started" but not available to run jobs until recovery completes. I have other databases on the same server that are transactional publications. It seems to me that if I let users update the published databases, transactions will start to build up in the log, but won't be moved to the distribution database or onto the subscribers because SqlAgent isn't running jobs. Should I be overly concerned about performing updates before

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  • DNS and RPC Unavailable

    - by Berek Bryan
    I have a server that is host a MSSQL database and some other server related tasks. The server communicaties with a large number of devices. The devices send data to the server. The communication links are down between the devices on the intranet and to the outside world. However it seems I can ping and can be pinged from machines on the same switch. This includes the DNS Servers. When I run, C:\ipconfig /registerdns I get RPC Server is Unavailable. So, it seems that the server can not verify the DNS server. Both DNS server are up and running. No other machines are affected on the network.

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  • How can I run this batch file?

    - by tech
    OSQL -S 127.0.0.1 -U sa -P password RESTORE DATABASE DATA FROM DISK = C:\backup\data.dat GO EXIT This is the batch file. but after I run the OSQL -S 127.0.0.1 -U sa -P password, the dos command start with the line 1> After that, the batch cmd can't run. How can I fix this problem? thz.

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  • SQL query duplicating results [on hold]

    - by Ben
    I have written a query that results in data being retrieved for the top 5 customers in my table per account manager. Here is the query: SELECT account_manager_id, mgap_ska_id, total FROM (SELECT account_manager_id, mgap_ska_id, mgap_growth + mgap_recovery AS total, @grp_rank := IF(@current_accmanid = account_manager_id, @grp_rank + 1, 1) AS grp_rank, @current_accmanid := account_manager_id FROM mgap_orders ORDER BY total DESC ) ranked WHERE grp_rank <= 5 and here is the result of the query: account_manager_id mgap_ska_id total 159840 5062352 61569.21 159840 5062352 61569.21 159840 5062352 61569.21 159840 5062352 61569.21 159840 5062352 61569.21 160023 5024546 52244.29 160023 5024546 52244.29 160023 5024546 52244.29 160023 5024546 52244.29 160023 5024546 52244.29 159669 5323292 50126.38 159669 5323292 50126.38 159669 5323292 50126.38 159669 5323292 50126.38 159669 5323292 50126.38 As you can see the query is partially working as needed, except Im getting duplicates for mgap_ska_id whereas it should be five individual mgap_ska_id numbers. and here is a sample of my data: mgap_ska_id account_manager_id mgap_growth mgap_recovery 5057810 64154 0 1160.78 5178114 24456 0 5773.42 5292421 160338 0 5146.04 5414091 24408 0 104.14 5057810 64154 0 1160.78 Can anyone see where Ive gone wrong in my query and how/where I might correct the error so I get the 5 top individual customers (mgap_ska_id) instead of the duplicated top single customer?

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  • Merge Replication with Geometry data type

    - by Puneet Jain
    The Merge Agent failed because the schema of the article at the Publisher does not match the schema of the article at the Subscriber. This can occur when there are pending DDL changes waiting to be applied at the Subscriber. Restart the Merge Agent to apply the DDL changes and synchronize the subscription. (Source: MSSQL_REPL, Error number: MSSQL_REPL-2147199398) Error converting data type varchar to geometry. (Source: MSSQLServer, Error number: 8114) Get help: http://help/8114

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  • Multi-Application Server Environment and Memcached Security

    - by jocull
    We are looking to integrate Memcached into our infrastructure, but have a security concern before we do. We run several platforms including ASP.NET and Coldfusion and have many app developers working many little applications across the different platforms. The concern is this: App A places item "dog" into cache. App B reads item "dog" (or worse: App B updates item "dog") After this happens, App A either retrieves bad information, or has already had its information viewed, aka "stolen". What we would like to do is make it so that each app can only interact with its own sandbox, and may not interfere with or read other application's data. Is this possible? Thanks.

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  • excel - generate a username from a full name field

    - by mheavers
    I'm trying to generate a username using a single name field in excel which has the person's first name and last name. I'm open to what the username would be, as long as its intuitive for the user. The name fields can be tricky, as the data looks like this: Albert Abongo (2 names) Stephen Michael Essuah Ackah (4 names) Alhaji Iddrisu Abdul-KArim (3 names) I guess my ideal usernames for these people would be aabongo sackah aabdul-karim

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  • How To Find Reasons of Why Site Goes Online/Offline

    - by HollerTrain
    Seems today a website I manage has been going online and offline throughout the entire day. I have no idea what is causing the issue so I am seeking guidance on where to start. It is a Wordpress based site. So here is what I DO know: I use a program that pings the server every minute and when the server is not responding me it emails me, so I can know exactly when the site is online and offline. The site between 8pm to 12pm 12.28, and around the 1a hour early morning 12.29 (New York City timezone, and all times below are in same timezone). At the time of the ups/downs I see a lot of strain on the memory usage. Look at the load average when the site is going online/offline (http://screencast.com/t/BRlfXkqrbJII). Then I ran this command to restart http (http://screencast.com/t/usVtYWZ2Qi) and the memory usage then goes down to this (http://screencast.com/t/VdTIy3bgZiQB). An hour after I restarted http, the site then went offline/online so restarting the http didn't do much help. When the site is going offline/online, I ran the top command and get this (http://screencast.com/t/zEwr7YQj3). Here is a top command when the site is at it's lowest (http://screencast.com/t/eaMfha9lbT - so this would be dubbged "normal"). Here is a bandwidth report (http://screencast.com/t/AS0h2CH1Gypq). The traffic doesn't seem to be that much (http://screencast.com/t/s7hrWNNic1K), but looking at my times the site is going up/down this may be one of the reasons? I have the dvp Nitro package at Media Temple (http://mediatemple.net/webhosting/nitro/). So at this point I would request some help in trying to figure out what the cause of this is, and how I can go about pinpointing this issue. ANY HELP is greatly appreciated.

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  • Suscribers locking during snapshot replication

    - by remi_bourgarel
    Hi all :) Here is my architecture : I have a main server and 4 replica (the servers are synchronized with snapshot replication). The replication is working fine, except for one thing : during the replication a lot of SELECT request on one of the replica fail with a time-out. Here are my questions : Can I avoid these time-out ? If I can't : how can I detect the start and the end of the replication to redirect all the request on one of the replica to the main ? Thanks Sorry if you already answered to that kind of question but I couldn't find anything.

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  • DHCP server with database backend

    - by Cory J
    I have been looking around for something to replace my (ancient) ISC-DHCPd server. A DHCP server with a database backend sounds like a great idea to me, as I could then have a nice, friendly web interface to my server. Surprisingly, I can't any major open-source projects that offer this. Does anyone know of one? I have also read about modifying ISC to use a database backend...can anyone tell me if this solution is stable enough for a busy production server? Or is using a database a Bad Idea™ all together? PS - http://stackoverflow.com/questions/893887/dchp-with-database-backend looks like SO couldn't answer this old, similar question. EDIT: I am looking for something on a free OS platform, Linux or BSD. If there is something absolutely great that is Windows-only though, still interested.

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  • Refering to another field in a form and return entries based on the filed

    - by Claus Machholdt
    Structure of DB is: Org_Year(Table) ID Org_Name_ID Org_Year Ft(Table) ID Org_Year_ID Count Org_Name(Table) ID Org_Name I've created a form to input data into Ft. Form has reference to Org_name. I should be able to choose between different org first. Afterwards i want to choose which year to enter data into Ft for. I only want to be presented with a list of Years according to the entries in the Org_Year table, where org matches my selection in the dropdown above. The query to populate the select box (Org_year_Box) is: SELECT Org_Year FROM Org_Year WHERE Org_Name_ID=Organisation_Name_ID.value; I't doesn't return the Years for the given Org_id when using the above query. But if i replace "Organisation_Name_ID.value" with the actual value ie. "2" it returns the correct years. How to do?

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  • SQL server Rebuild Index

    - by Uday
    How can we know that before rebuilding index --How much space is required for the Transaction Log file( I knew we may required to consider sort_tempdb option , if we set to ON then we may required to ensure about tempdb space as well , Also if we set off then sorting, temporary indexes(during Build phase of rebuild index) creation will takes place in same Database.)?. Usually I have checked with Many users they say :Log file size =1.5 * Index size. How much space required for the Filegroup for datafiles-for ex-Consider I have one filegroup with 1 Mdf + ndf files. I have MSDN Link :those are pretty good information about per-requisites before rebuild index Link :http://msdn.microsoft.com/en-us/library/ms191183.aspx How can I tell exactly or Approx... to get Log/Primary FG size(or any other filegroup).

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  • How to setup Database Permissions on SqlServer Express 2008

    - by Timo Willemsen
    I'm using a code-first approach of using the Entity Framework. When I first run the application it will try to create the database matching my MVC models. However, it doesn't have permission to create it I think. I get the following error: CREATE DATABASE permission denied in database 'master'. What user is trying to access the SqlServer and how can I add it's permissions to let it work? This is the connectionstring I'm using (which should be right...) <add name="ContextDb" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;initial catalog=ContextDb" providerName="System.Data.SqlClient"/> Cheers

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  • Installation of Access Database Engine 32-bit Fails

    - by Rayzor78
    I am trying to install Access Database Engine 2007 32-bit. The splash screen comes up, you click "Next", then it fails with the error: Installation ended prematurely because of an error You click "OK" and another error window says: The installation of the package failed. The exact same situation happens when I try this with Access Database Engine 2010 32-bit. This production server is running Windows Server 2008 R2 SP1 64-bit. Before I tried installing Access Database Engine 32-bit, I first needed to install Microsoft Office 2010 Pro (Excel and Office Tools only). I tried the 32-bit version on the production server since that is how I set it up in our Dev environment. No luck. The 32-bit version would not install. I did NOT get the error "You have 64-bit components of Office installed". I simply received the exact same two errors listed above. So, I knew that 32-bit/64-bit did not really matter for the Office install for my project, so I installed 64-bit of Office Pro 2010 (Excel and Office Tools only) with no problems. I have a requirement that I need to have the 32-bit version of the Access Database Engine installed. 2007 or 2010, doesn't matter. I cannot use the 64-bit version of Access Database Engine 2010 because my SSIS package will not work with it. I require the 32-bit version. I've tried several steps to try to get it installed. I seriously think that the production server has some aversion to installing 32-bit applications. Here's what I've tried: Tried installing via command line with the "/passive" switch....no luck. Tried numerous iterations to copy the install file to the server (downloaded a fresh copy directly to the server, downloaded a fresh copy to my local machine then copied it over, copied it over zipped up) (http://social.msdn.microsoft.com/Forums/en-US/sqldataaccess/thread/efd3c1f0-07cd-45ca-a626-2dd0c7ac3e9f). Tried Method 1 from this link. Could not try Method 2 because it requires a server reboot and in my environment that requires a long change management process. I've verified that I am a local administrator on the server. (Evidence, I am able to install other applications (office 64-bit per above)). Verified that there are no other office products that should be blocking the installation. The fore-mentioned install of Excel 2010 64-bit was the first Office product installed on the server. VERY ODD: To test my theory that the production server does not like 32-bit applications, I installed something lightweight. I installed 7-Zip 32-bit on the production server with no problems whatsoever. Here are some things that I have not tried (i will follow-up once I do): Method 2 (as mentioned above). Requires a server reboot. Have not verified that the Dev and Production environments are 100% identical. I've done a cursory check and on the surface they appear to be the same (same OS and SP version). I need to do a deeper dive to be 100% certain. I had no problems in my Dev environment. In Dev, I installed Office 2010 Pro 64-bit (Excel & Office Tools only) then via command line w/ the "/passive" switch, installed Access Database Engine 2010 32-bit. I don't know what else to try. Any suggestions or comments?

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  • Impact of the L3 cache on performance - worth a dual-processor system?

    - by Dan Nissenbaum
    I will be purchasing a new high-end system, and I would like to have a better sense of whether a dual-processor Xeon system (I am looking at the new, high-end Xeon E5-2687W) might, realistically, provide a noticeable performance improvement due to the doubling of the L3 cache (20 MB per CPU). (This is in addition to the occasional added advantage due to the doubling of cores and RAM.) My usage scenario is, roughly, that I have many background applications running at any time - 3 or 4 data compression/backup applications, a low-impact web server, one or two virtual machines at any given time (usually fairly idle), and perhaps 20 utility programs that utilize a noticeable (but small) portion of the CPU cores. In total, when I am not actively using the computer, about 25% of the total CPU power is utilized in my current i7-970 6-core (12 thread) system. When I am doing routine work, the CPU utilization often exceeds 50%, and occasionally hits 75%-80%. The Xeon E5-2687W is not only a second-generation i7 (so should improve performance for that reason), but also has 8 cores (16 threads), rather than 6 cores. For this reason, I expect to run into the 75% CPU range even less frequently. Nonetheless, the ability to double the cores and the RAM is a consideration. However, in the end, I believe this decision comes down to whether the doubling of the L3 cache will provide a noticeable improvement. There are many benchmarks, and a lot of discussion, regarding CPU power. However, I find very little discussion of L3 cache utilization, and how increases in the L3 cache (such as doubling it with dual processors) affect performance. For example: If there are only two processes running, but each benefits from a large L3 cache (such as might be the case for background processes that frequently scan the file system), perhaps the overall system performance might noticeably improve with dual CPU's - even if only a single core is active on each CPU - due to each process having double the effective L3 cache. I am hoping that someone has a sense of the benefits of increasing (or doubling) the L3 cache size. Note: the CPU I am considering (the Xeon E5-2687W) has 20 MB L3 cache, so a system with dual CPU's would have 40 MB L3 cache.

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