If I am using Database Mirroring for my production database in SQL Serever 2005, can I do mirroring on the mirror database?
Principal Database -- Mirror -- Mirror A -- Mirror -- Mirror B
Can this be done?
Question 2:
Can I do 2 mirroring on a single principal database? If can, which mirror database it will goes when the failed over happen? can the other mirror switch to mirror the failed over database?
I am using SQl Server 2012 Database Mirroring with around 40 gb as mdf and 1 gb as ldf. Now my ldf size increased . How to reduce ldf size while mirror enabled with mirror server and witness server. Can shrink the ldf with mirror enables.
we designated one server as a mirrored server. this server will host all mirrored databases from different principles in different server using certificate.
1) Server A (Principle) Server B(Mirrored) 2) Server C (Principle) Server B(Mirrored)
I was able to set up mirroring between A and B. But unable to set up mirroring between C and B. My question is "Can I grant connect on endpoint to two different host logins?"
For example, on the server B I created two different logins for Server A and C in order to assign different certificates to two principle servers.
For Server A. create login server_A_login with password = 'djkkajnxks'; go create user server_A_user for login server_A_login go create certificate server_A_cert authorization Server_A_user from file = 'c:certificateserver_a_cert.cer' go
GRANT CONNECT ON ENDPOINT::Endpoint_Mirroring TO [server_a_login]; GO
For Server C. create login server_C_login with password = 'djkkajnxks'; go create user server_C_user for login server_c_login go create certificate server_c_cert authorization Server_c_user from file = 'c:certificateserver_c_cert.cer' go
GRANT CONNECT ON ENDPOINT::Endpoint_Mirroring TO [server_c_login]; GO
when I set up like this and try to start mirroring, I am getting error from server c saying, "the network tcp:serverb.corp.com can not be reached or does not exist"
But mirroring between server a and b is OK. I set up them first, then between c and b.
I've a very basic doubt about database mirroring. I did setup a database mirroring session with the help of SQL Server Management Studio between the server A (db1) and B(db1). When is stop database mirroring by using the command button "Stop Mirroring" available in the mirroring page of SQL Server Management Studio , the mirror database{ B(db1) } goes to state "Restoring...". After stopping the mirroring i'm not able to access the mirror database.
Can you please tell me how to bring mirror database B(db1) to operation mode so that we can start working with that database?
When I try to setup mirror on a SQLserver dbase using windows Authenticated login I get error:-
Login failed for user 'SERVERBAdministrator'. (Microsoft SQL Server , Error: 4060).The login connect string however on selection of SERVERB from SERVERA has a greyed out option for using Windows Authenticated login which clearly shows Username: SERVERAAdministrator.It is odd that the error coming back is showing SERVERBAdministrator on the rejection. (somehow the machines got swapped over in the authentication) The strange thing is if you use the SQLserver studio on SERVERA to connect to SERVERB using the object browser and Windows authenticated login it all works fine without errors. clearly the Mirror software is using some other means/privs of login to establish the connection.
The two machines SERVERA and SERVERB are in the same Domain (DOM1) but they are not using a domain user account.They are using Administrator user on both independent machines. The SQLSERVER install specified both Windows and sqlserver logins. The mirror is to use Windows authenticated login.Is there some login priv we are missing The sqlserver security has allowed this type of login......
Hi guys , I would like to know what's the exactly results able to get in this following scenario.
Server A : Principal
Server M : Mirror
Server W : Witness
1) Firstly, disable server M, following by server W. So probably i will unable to connect to Server A eventhough it acts as a principal.
2) Next, if I enable either server M or server W , what will I able to get actually ? Is it the mirroring works like the article which written in Microsoft page ?(http://www.microsoft.com/technet/prodtechnol/sql/2005/dbmirror.mspx#ETPAE)
At here, I get an error message and unable to continue the mirroring section. ( "Database EMS is enabled for Database Mirroring, but neither the partner nor witness server instances are available: the database cannot be opened." or "Database 'EMS' is being recovered. Waiting until recovery is finished." )
3) If I enable both server M and server W, the mirroring continue to work again.
Can I have any assistance on (2) issue? Thx for the assistance.
I have setup a database mirroring session without witness - ServerA is the principal, ServerB is the mirror,. Each SQL Server instance is hosted on its own machine on sql2005 EE SP2. The mirroring is working correctly. If I submit to server ServerA command:
ALTER DATABASE MYDBNAME SET PARTNER FAILOVER
, ServerB becomes the principal, it means that mirroring works correctly.
My issue is with the SQL Native Client and a front-end ASP application (actually IIS 6.0 site) that needs to make use of this database. I have setup my front-end application to use SQL Native Client and specified the failover server in connection string. Here is the connection string that I am using :
Everything works perfectly on my front-end application when ServerA is the principal. If I execute on server ServerA command:
ALTER DATABASE MYDBNAME SET PARTNER FAILOVER
, ServerB becomes the principal, and the failover occurs correctly on the database side. The problem is that my front-end application is not able to query the database on ServerB. The error appears:
Microsoft SQL Native Client error '80004005'
Cannot open database "MYDBNAME" requested by the login. The login failed.
This behavior my appication till I unload IIS 6.0 pool application. After that my front-end application becomes work correctly with ServerB.
When I swap server, I execute on server ServerB command:
ALTER DATABASE MYDBNAME SET PARTNER FAILOVER,
my IIS 6.0 application automaticly turn back to ServerA without any action on my side.
I am using SQL Native Client last version http://download.microsoft.com/download/2/7/c/27c60d49-6dbe-423e-9a9e-1c873f269484/sqlncli.msi (issued in February 2007). Has anyone experienced this issue? I'm thinking that it's a problem in the SQL Native client
When Create Mirror Database Server, Where need to store the Transaction Log backup file?I took FULL Backup of my Primary Database, and I restored at my Mirror Server also. When I try to create a Mirror Database."The remote copy of database "<db_name>" has not been rolled forward to a point in time that is encompassed in the local copy of the database log. (Microsoft SQL Server, Error:1412)".I am misplacing the Transaction Log backup file. Where I need to store that file?
missing witness server information and the fail-over is broken suddenly? 4:00am no maintenance job. I have one sql job on 10pm for backup on database transaction log only.
I can see the primary have problem then perform fail-over to mirror database, the auto fail-over was broken.
I re-build the sql mirror is OK , but i want to find the root cause.
Windows application event was full when there have many failed event, i have increase log size for application event. Â
I have configured a Mirror with Server A as Principal, Server B as Mirror. I can Remote Desktop into both machines and see the Launch Mirror Monitor option in the Tasks list from the Object Explorer. I do not, however, have the option when logged in from my desktop Object Explorer. In each instance, I log into OE using the SA login. Both machines are on sp2. I have seen others post similar problems but have not found anyone with a resolution. Any help is greatly appreciated.
Hello all, I have a Production server which has 2gb of memory. SQL server memory is set to configure dynamically. The Server also has a third party application on it. The third party application was running poorly, and the software vendors recommended running the following sql on a job every hour:-
exec sp_configue 'max server memory(MB)',500 reconfigure
exec sp_configure 'max server memory(MB)'1400 reconfigure
The hourly job has the effect of flushing out sql server memory every hour and setting the max amount down to 500mb and back up to 1400mb. SQL server still manages memory dynamically, so within the hour before the next time the job runs, sql server could use more than 1400mb.
I' feel that this job will degrade sql server performance because it will empty the buffer cache and procedure cache. My approach would be to select the 'use a fixed memory' option and set it to 1400mb, and not use their recommendation. Does anybody have experience of this, and perhaps explain the consequence of running the recommended job every hour. Any advice would be great. Pargat
I have three win2k8 r2 servers. Â 2 are running SQL 2008 r2 and are mirrored. The 3rd server is a witness server. Every so often we get errors and failovers of the mirror. The communication errors are between the witness server and sql servers. No errors between SQL servers. There seem to be no network issues and happen randomly.Â
Event id 1474 and 1479. The mirroring connection to "TCP://witnesssrv:5022" has timed out for database "DB" after 30 seconds without a response.  Check the service and network connections. Database mirroring connection error 4 'An error occurred while receiving data: '64(The specified network name is no longer available.)'.' for 'TCP://witnesssrv:5022'.
I have configured active passive cluster in production environment. And we also have a dr which we have configured with asynchronous mirroring with no witness. Currently active node(node
a) is in sync with dr. When failover happens and the second node(node b) becomes active, the mirror is broken and goes to disconnected mode.
But when we failback again to node a mirror is connected again and is in sync again. In our setup we have active passive cluster and a standalone server as dr.
DB replication can set db recovery model to simple ,why db mirror can not  db recovery model to simple.
DB mirror must be set to full recovery model.
As far as I know, whatever db mirror  and db replication ,there is a log reader to read the log in the ldf file DB mirror and DB replication are almost the same principle to replicate the db to another db server.
I have created a Endpoint with "Mirroring Server" on the mirroring instance. Due to the keyword server i am not able to drop the endpoint now.
Also am not able to configure a mirror in a windows workgroup also( the two systems principal and mirror are under same network ). I have followed many ways as per msdn articles and other blogs.
I am not able to connect to the mirror server.Â
I have tried giving the ip addr and the port no, also the computer name:port no, computername.local:port no etc. Both the systems are running on sql server 2008 only
I always get the error as Connection cannot be established to the destination.
(I have also enabled the ports in firewall by creating inbound and outbound rules)
The issue probably lies in NAMING server address i guess.
Hi everybody, I have a mirroring set up for around 30 databases in a 64 bit - 2 powerfull servers scenario - wih latest sp2 + hotfix. Mirroring works perfectly most of the times but when the principal is getting busy during the busy period of the day all of a sudden the processor on the mirror jumps to 100% and stays there for a long time - there are no live databases on the mirror server - all the databases are in mirrored mode. The principal server processor is less than 5% all the time. The network load between the principal and the mirror is also in normal limits. The principal server is dedicated to SQL but the mirror has other things too but the other processes use up maximum 15-20% of the CPU and when I stop SQL Server in one of those moments when the CPU jumps to 100% everything comes back to normal so it's clear that the issue is SQL on the mirror. Any ideas would be greatly appreciated.
Apart from SQL Server Management Studio's "configure security" button on the database mirroring tab of the database properties dialog - are there any other tools or scripts that can be used to configure mirroring?
If I can't find one, I'd like to write a script / tool that: 0. paramterizes all the variables involved in database mirroring a. configures connections to the primary and mirrored SQL Servers b. does the backup / restore between servers c. configures endpoints / security d. checks possible pitfalls (can't connect, firewall, etc.) e. starts mirroring f. does all the above for a list of the databases I'd like to mirror (anywhere from 6 to 30 databases)
SSMS wizards get me through most the above - it's just tiresome to repeat for each database.
I have a 2 node cluster having 4 cores each wherein having 3 instances of SQL 2008 R2 enterprise comprising of 60 databases, 20 on each instance. I need to setup mirroring for each of the databases to a secondary server having 4 cores and 3 instances.
What i understand is that in this case the mirror server will be providing max of 512 worker threads and the 60 mirror databases would consume 240 threads.
What all needs to be checked for looking into the feasibility of going ahead with a async mirror setup as mentioned above.
I'am currently testing a MSSQL 2005 mirroring implementation with automatically failover.
1 principal server ====> Server A 1 mirror server ====> Server B 1 witness server ====> Server C
When server A fails Server B becomes Principal. ( which is the general idea ) This is working perfectly.
The problem is when i try to connect to the mirror Server B ( actually the new principal )
I use the .NET connection string with the failover parameter ( even without the parameter ) the connection fails. ( the general error : unable to connect, or connection property has not been initialized )
Data Source=ServerA; Failover Partner=ServerB;Initial Catalog=DBMTest;uid=dbuser;pwd=dbpassword;
This connection property works fine when server A (original principal) is online.
When i run the SQL profiler with the mirror db as profile, i dont see the traffic.
So you think the mirror server has a network problem or was not connfigured for remote access. i thought that also, but when i create a 'stand alone - non mirrored' database the same application with the same connetion string ( well.....different db) works fine.
The problem must be in the whole mirroring implementation....... ( my idea )
Does anyone had the same problem, or better, doed anyone know how to solve it?
I was trying to test mirroring and now would like to delete the mirror database but it says I need to remove database mirroring first. I deleted the endpoint and cannot figure out how to remove the mirroring. Can someone please help.
Hi All,Just wondered if i could ask you for some advice and help.I'm looking to write a site, and one of the functions of the site is to remind the user of a certain event at a certain time. I was wondering how i would do this? or if anyone has a working example i could use?Also I dont quite know what database to use...... would MySQL do the function i am after???? If so then no more problem lol If not what database would you recommend i use?ThanksDanny
Im trying to recover my database using the mdf and ldf files.I dont have any backup and i have recovered two of the mdf files usinga tool which "discovers" deleted files after hard drive formatting...It sounds cool, isnt it...:? :(Obviously, i get a "suspect" message when the server starts and the logfile says this kind of things:·"Full PathName.MDF is not a primary database file." (This is one ofthe files repaired using the magic tool.·Error: 823, Severity: 24, State: 6·"I/O error (torn page) detected during read at offset0000000000000000 in file 'Full PathiName2.mdf'... Name2.mdf is thesecond file·Device activation error. The physical file name 'Full PathName2.mdf'may be incorrect.When i try to execute the command "DBCC CHECKDB ('Database_Name') WITHPHYSICAL_ONLY" i get the following message :·Could not open FCB for invalid file ID 0 in database 'Logs'.Do you have any ideas? Thank you very much...:D
I m using sql server 2005 i have got one request ,to apply page level locking on database can nyone how it is done i can do that for a single script and for session(transaction isolation level) but dont know about database level locking scheme
I do weekly full backups of my SQL databases via a scheduled T-SQL job.I noticed that I have some static databases that dont normally change,so I dont want to back it up if it has not changed, but when it does,then I want a backup.Is there something in the master table, as example, that I can checkprior to running the backup that will indicate any changes?An example is the Northwind database. I could exclude it from thebackup, but then I would not back it up if it where to change. Againthis is an example, I would not need to modify Northwind.Thanks in advance for any ideas; they usually give me ideas to problemsyet to come....Rob Camarda
I have a problem with deleting old bak files from a Cleanup Maintenance Task. I have backups in subdirectories and I read in SQL Server 2005 Books Online that:
In contrast to earlier versions of the Maintenance Cleanup task, the SQL Server 2005 version of the task does not automatically delete files in the subdirectories of the specified directory. This constraint reduces the surface area of any attack that could exploit the functionality of the Maintenance Cleanup task to delete files maliciously. To delete the first-level subfolders, you must explicitly elect to do this by checking the Include first-level subfolders option in the Maintenance Cleanup Task dialog box.
I cannot find such an option in my Maintenance Cleanup Task dialog box. I do not think I installed any service packs yet, could this be the problem?
