SQL Mirrosing Version Requirements For Principal And Mirror SQL Instances
Jul 6, 2007
In documentation about SQL mirroring, the only thing about version requirement are that: 1) enterprise, standard, developer edition; 2) SP1 for official support
Is there any requirement for the Principal and Mirror SQL instances? For example, can one be Enterprise, the other one be Standard? Can one be SP1 and the other one be SP2?
It seems we are having some problem with the above scenario, not sure if that's supported..
Thanks!
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Sep 26, 2007
We have mirroring setup for 5 dbs, 4 of which are synchronized and 1 which is in "synchronizing" state on the principal and "restoring" state on the mirror. Mirroring for all dbs has been working fine for the past several months and we have a witness that has allowed automatic failover in the past without problems.
This database has several bulk inserts performed throughout the day and am sure there is some latency due to the size of these transactions.
Not sure as to why this is happening all of a sudden, but the db in question has been in this state for the past 12 hrs. I checked the mirroring status on the principal and it states that it is "synchronizing: data is being transferred from principal to mirror", but the mirror server states that db is in "restoring" state. Can anyone suggest as to how I can get the database on the mirroring server to get back to "mirror, synchronizing/restoring..." state? Or suggest on how I can troubleshoot this?
Thanks in advance.
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Apr 13, 2007
I have a Server Agent Job that does a full backup of my principal database. I then have a separate job which does an incremental backup of the log files every 20 mins throughout the working day - the incremental backup sends me an email if it fails.
If I establish a failover to the mirror server, the backups continually try to run, sending me an email every 20 mins telling me that it can't back up the database as it's a Mirror.
Is there any way to script a method in the job that checks to see if the DB is a principal or mirror. if it's a principal I want the backup to happen, if it's a mirror I want it to skip the job.
Thanks in advance to anyone that can help
Niels
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Apr 2, 2007
Hi guys, right now I am facing this scenario several times and I wonder why it can be happen. Both SQL servers are in Enterprise SP1 edition. The mirroring setup can be work fine to me. Once my principal get attacking by DDOS, then mirroring session change the status to 'DISCONNECTED'. However, after DDOS attack solved and line connection gets back on the principal server, the mirroring session still remain to the status ('DISCONNECTED'). If I restart the SQL services on principal server or mirror server, then only the mirroring session change to 'SYNCHRONIZING' status. Does anyone faced this happen before? I need some assistance on it and hope able to get any explanation or solution from you guys. Thanx and have a nice day.
Best Regards,
Hans
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Nov 29, 2006
Hi,
can we control how transaction send from principal to mirror ?
If application inserting 10000000 rows in one transaction to principal database
how infomation will be transfered once it is commited and where it will be stored before it is replayed on mirror database?
1. Is it going to be 1 big data packet ?
2.is it going to be split on many packets (of what size ?)
Thanks
Alex
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Mar 3, 2006
Hi there.
Imagine this scenario in High Availability mode :
The principal sends a transaction log to the mirror, then the mirror saves the log on disk and then notify the principal. What happen if the acknowledge is lost, because a network failure(back on track in 1 or 2 seconds) and the principal dont receive it ?
In this case an automatic failover will not occurr, and i dont really know what happen next...
Will the mirror resend the ack ?
The heartbeat mechanism plays an important role in solving this scenario ?
The principal must receive the ack to commit the transaction, and i´m not seeing how the problem is solved.
I have one other question. In "Database Mirroring in SQL Server 2005" document, is said that "...unlike a distributed transaction, failures to commit on the mirror will not cause a transaction rollback on the principal".
But in this case the mirror will be inconsistent with the principal. How is this problem solved ?
Thanks in advance.
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Oct 16, 2006
Hi!
Is it possible to use teamed network adapters for Principal and Mirror in a quorum?
I need to use a VLAN networkconnection in order to setup a Synchronized Database Mirror with Witness session.
Thanks in advance!
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Nov 7, 2006
We were having problems setting up the mirroring, so I did it via command lines. I found out the "alter...set partnership" command works on the mirror server going to the principal, but gets a 1418 error when going from the principal to the mirror.
So if A is the principal and B is the mirror, A to B fails but B to A works.
If I reverse it so that B is the principal and A is the mirror, B to A fails and A to B works.
Any suggestions?
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Aug 10, 2015
I have checked my Production databases, both are went to Disconnected state, both are unable to connect to the application, i checked all the services and its working fine. and restarted the end points on Principal and Mirror, still issue not solved, after restart the witness server End point both the databases are working fine.
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Oct 29, 2007
Hi all,
Can a MIRROR server have mirrored databases on many instances or must all of the mirrored databases on a server reside on one instance?
This initial implementation worked fine:
PRINCIPAL ServerPROD1instance01 endpoint1430
MIRROR ServerDRinstance01 endpoint1440
WITNESS ServerZ endpoint1450
This second implementation (different PRINCIPAL server to same MIRROR but to a different instance)
PRINCIPAL ServerPROD2instance5 endpoint1430
MIRROR ServerDRinstance02 endpoint1440 <<same mirror server but different instance
WITNESS ServerZ endpoint1450
I know that you can only install one endpoint on each server. Does that mean that the endpoint can only resolve to one instance though?
The second implementation looks fine until the final step (start mirroring). I get the following error:
An error occured while starting mirroring
Alter failed for database 'test'
An exception occurred while executing transaction-sql statement or batch
The remote copy of database 'test' does not exist. Check the database name and resissue the command
I have created the test database in instance02 and rolled a log onto it. It is currently in recovery mode - waiting patiently for another log.....
I have read books online and 2k5 unleashed but can't see anything that relates to an implementation across mutliple instances on the DRmirrored servers.
Has anyone tried to do this? Can you confirm its possible?
Many thanks in advance...
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Jun 13, 2007
Hi i have tried a search on this topic but didn't find much.
I have my fiest sql db live on my we server and all works fine, more luck than skill i think.
But now i wory about backing up my data i have tried various tools backing up the db every 5 minutes and then sending it too another server via ftp this tool works fine but when we have a few people on and the db is accessed frequently it can't back it up i assume this is to do with the backup tool needing an exclusive lock on it.
What is the difference between Replication and data mirror both of these seem to be talked about alot and is there a simple guide somewhere on how to set these up.
Or if i am coming at this from totally the wrong angle then please let me know
Thanxs
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Jun 14, 2015
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.
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Sep 28, 2007
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Jan 31, 2008
After adding the Witness Server to the Mirror session, the Witness Connection state between the Mirror and Witness Connection is Disconnected and the state between Principal and Witness Connection is Connected.
The procedures defined in Books Online was used to setup Database Mirroring...when the Witness server was added to the Mirror session, only the alter database T-SQL statement was executed on the Principal server.
ALTER DATABASE <db_name> SET WITNESS = 'TCP://<servername>:<port>'
After executing the above statement, a few seconds later the state between Principal and Witness Connection changed to Connected and the state between Mirror and Witness Connection remains Disconnected.
The Mirror session is not using Certificates, every server is on the same domain, using the same domain login account, and all servers have SP2 installed running Enterprise Edition.
Any idea's why the state between Mirror and Witness Connection remains Disconnected?
Thanks,
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Dec 27, 2006
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.
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Jul 18, 2001
I had a server with SQL Server 7.0
I installed a named instance of SQL Server 2000 and then i passed all my DB
of the 7.0 instance to the 2000 instance.
Then i removed the 7.0 instance, that was the default instance.
So at the moment there is only the 2000 version, but it isn't the default
instance
Can the 2000 instance become the default instance? (So that clients can
connect to it simply through computer name, and not creating an alias)
thanks
Fede
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Aug 29, 2006
Hello,
I am starting to use SQL Server 2005. I am having trouble connecting remotely. I tried to enable the 'sa' user and got this error:
Cannot use the special principal 'sa'
Is the 'sa' user no longer valid for remote connections?
Thank you
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Sep 1, 2014
Is there any way to restore a database of higher version to lower version.
E.g. I have created a database in sql server 2012, created some tables & procedures in that.I took Full backup of that database. Can I restore it to sql 2008r2 or any lower version.
I know direct restore is not possible, I have to use either import or export option or generating script,but i want to know is there any easy step to do so.
Vimal Lohani
SQL DBA | MCP (70-461,70-462)
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Jul 25, 2006
Hi all,
Since some analysis services features are only available in Enterprise version , I have to upgrade my SQL 2005 server from standard edition to enterpise edition.
So I uninstall originial standard version of analysis service and install a Enterprise version. However, the analysis service is still a standard version after installation.
Is it possible to keep data engine as standard version and install a enterprise version of analysis service?
Thank you very much
Tony
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Feb 19, 2008
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Mar 11, 2006
Hi,
I have tried to attatch a database ,created by SQL server Express within a C# application , in SQL server 2005 Enterprise edition, but the following error message appears:
-----------------------------
TITLE: Microsoft SQL Server Management Studio
------------------------------
Attach database failed for Server 'MEDO'. (Microsoft.SqlServer.Smo)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft SQL Server&ProdVer=9.00.1187.00&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Attach database+Server&LinkId=20476
------------------------------
ADDITIONAL INFORMATION:
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)
------------------------------
The database 'E:X.MDF' cannot be opened because it is version 611. This server supports version 607 and earlier. A downgrade path is not supported.
Could not open new database 'E:X.MDF'. CREATE DATABASE is aborted. (Microsoft SQL Server, Error: 948)
------------------------------
so , how can I solve this problem , I need to reed the data resides in the tables of 'X' database , how can I do it?? please help me.
Thanks in advance for any help.
Aya.
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Jan 7, 2008
I have an ssis package that downloads a SQL Server 2000 database and restores it to a SQL 2005 server. Ninety-five percent of the time it runs just fine, but every so often the job fails and I get the following set of error messages in the log file. (I have had to delete some of the proprietary information for this message to satisfy my boss like putting in [Database name] in place of the actual name of the database in the error message).
OnError, Restore backup file to DB,,,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,0,0x,Converting database [Database name] from version 539 to the current version 611.
OnError,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,0,0x,Converting database [Database name] from version 539 to the current version 611.
OnError,Restore backup file to DB,,,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,0,0x,Database [Database name] running the upgrade step from version 539 to version 551.
OnError,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,0,0x,Database [Database name] running the upgrade step from version 539 to version 551.
OnError,Restore backup file to DB,,,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,0,0x,The transaction log for database [Database name] is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases
OnError,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,0,0x,The transaction log for database [Database name] is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases
OnError,SQL5,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,0,0x,RESTORE could not start database [Database name].
OnError,SQL5,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,0,0x,RESTORE could not start database [Database name].
OnError,SQL5,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,-1073548784,0x,Executing the query "RESTORE DATABASE [Database name]
FROM DISK = '[Path to back up file]' WITH REPLACE,
MOVE 'ASP_Live_Data' TO [Path to MDF file],
MOVE 'ASP_Live_Log' TO [Path to LDF file]" failed with the following error: "RESTORE DATABASE is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
OnError,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,-1073548784,0x,Executing the query "RESTORE DATABASE [Database name]
FROM DISK = '[Path to backup file]' WITH REPLACE,
MOVE 'ASP_Live_Data' TO [Path to MDF file]',
MOVE 'ASP_Live_Log' TO [Path to LDF file]" failed with the following error: "RESTORE DATABASE is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
OnTaskFailed,Restore backup file to DB,,,1/6/2008 2:59:31 AM,1/6/2008 2:59:31 AM,0,0x,(null)
Does anyone have any suggestions?
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Jan 31, 2007
Want to upgrade Evaluation version of SQL 2005 to full retail version. How would I do that. Thanks very much for your hel
Sam Commar
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Sep 22, 2015
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Jul 16, 2007
Now, I checked and verified that my backup version of SQL Server is the same as the version installed on the computer I'm restoring too.
I have SQL Server on a production machine that I backed up and want to test a full restore on a dev machine to make sure it will work when I need it to.
Now that I've run the restore command on my tape backup and go to restart the SQL server service I receive:
Configuration block version 0 is not a valid version number. SQL Server is exiting. Restore the master database or reinstall.
I'm afraid I don't understand why this is happening. If the builds are the same, then shouldn't restoring the MASTER database have worked normally and I'd be able to restart the service now?
Any thoughts or suggestions?
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Apr 19, 2008
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Msg 15151, Level 16, State 1, Line 1
Cannot find the object 'Resident', because it does not exist or you do not have permission.
If I just run
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Aug 8, 2007
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Jan 4, 2006
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Any ideas... or is this just an issue that will be fixed in the next SP?
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Dec 7, 2007
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Mar 12, 2007
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