database backup and restore in sql server 2005

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database backup and restore in sql server 2005

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abhishek.c1984

Posted Wednesday, July 22, 2009 5:08 AM

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Need help in taking database backup and restore using java......

Database: SQLServer 2005

I have done it this way.....

SQL Backup Query="BACKUP DATABASE mydatabase TO disk=?";

while executing, iam getting the following error ....

Cannot perform a backup or restore operation within a transaction.

Also let me know, how to make a forced database backup?

Post #757297

ALZDBA

Posted Wednesday, July 22, 2009 5:28 AM

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Which driver are you using ?

Are you (or the driver by default) using implicit transactions ?

A backup/restore operation cannot be incapsulated with a transaction.
If a restore fails, the db is left in its failed state (restoring) !

Johan

     Jul 13

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Post #757306

Grant Fritchey

Posted Wednesday, July 22, 2009 5:52 AM

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What do you mean by a "forced" database backup?

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Post #757316

abhishek.c1984

Posted Wednesday, July 22, 2009 6:31 AM

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thanks for the reply.......

Iam using type 4 driver (sqljdbc) .......

If a query has to be executed, it has to be in transaction......

Or else is there any other way?

What do you mean by a "forced" database backup?

Sometimes, while executing the query i have encountered the following error

"some active connections.........."
So before going ahead, i need to close the active connections and then proceed further.......So, in such cases is it possible to make forced backup and restore...

Note: forced in the sense, complete the database operations irrespective of active connections

Post #757357

ALZDBA

Posted Wednesday, July 22, 2009 6:59 AM

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abhishek.c1984 (7/22/2009)

... "some active connections.........."
So before going ahead, i need to close the active connections and then proceed further.......So, in such cases is it possible to make forced backup and restore...

Note: forced in the sense, complete the database operations irrespective of active connections

Probably it refers to open connections to the target database of your restore operation.

If you want to restore with interrupting all connections,
just start your restore statement by adding

alter database yourdb set offline with rollback immediate ;
restore database ...

Johan

     Jul 13

Don't drive faster than your guardian angel can fly ...
but keeping both feet on the ground won't get you anywhere w00t

Need a bit of Powershell? How about this

Who am I ? Sometimes this is me but most of the time this is me Hehe

Post #757387

Grant Fritchey

Posted Wednesday, July 22, 2009 7:24 AM

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Ah, right. ALZDBA answered it. You're not forcing the backup, you're forcing the restore, but not even that really, you're just kicking all the users off the database.

----------------------------------------------------
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood..." Theodore Roosevelt
The Scary DBA
Author of: SQL Server 2012 Query Performance Tuning
SQL Server 2008 Query Performance Tuning Distilled
and
SQL Server Execution Plans

Product Evangelist for Red Gate Software

Post #757418

abhishek.c1984

Posted Thursday, July 23, 2009 12:11 AM

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thanks for the reply,

I have just executed the query in SQL Server 2005, it worked fine...but the database connection was broken

-------
Nonqualified transactions are being rolled back. Estimated rollback completion: 100%.
Failed to restart the current database. The current database is switched to master.
RESTORE DATABASE successfully processed 561 pages in 0.350 seconds (13.130 MB/sec).

---------------------

But it failed to start the current database...

Error:
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Connection reset by peer: socket write error

Note: How can i use this query in the application?
It is giving the following error

Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: ALTER DATABASE statement not allowed within multi-statement transaction.

Post #757985

ALZDBA

Posted Thursday, July 23, 2009 1:31 AM

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abhishek.c1984 (7/23/2009)

Don't use a transaction to perform backup or restore operations !!
( it does not have a transaction scope - there is no rollback feature for backup / restore !)

Do not connect to the database you are trying to restore !

Connect to master or tempdb to perform your database restore operation.

Johan

     Jul 13

Don't drive faster than your guardian angel can fly ...
but keeping both feet on the ground won't get you anywhere w00t

Need a bit of Powershell? How about this

Who am I ? Sometimes this is me but most of the time this is me Hehe

Post #758008

abhishek.c1984

Posted Thursday, July 23, 2009 3:14 AM

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thanks for the reply.....

Can you please let me know how can i connect to master or tempdb to perform database restore operation.

Tell me how to perform this operation from the java application, without being connected to database

Post #758048

ALZDBA

Posted Thursday, July 23, 2009 3:52 AM

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BP is always to specify the database name you want to connect to (don't rely on the logins default database ! A sql instance can host multiple databases !)

Check out BOL for the jdbc driver: http://msdn.microsoft.com/en-us/library/ms378988%28SQL.90%29.aspx

IMO you should provide as many info as you can in your connection !
This will help with problem solving, monitoring, ...

e.g.
// Get connection
DriverManager.registerDriver(new com.microsoft.jdbc.sqlserver.SQLServerDriver());
String url="jdbc:microsoft:sqlserver://yourip;DatabaseName="yourdb";
Connection conn=DriverManager.getConnection(url,"username","password");

Johan

     Jul 13

Don't drive faster than your guardian angel can fly ...
but keeping both feet on the ground won't get you anywhere w00t

Need a bit of Powershell? How about this

Who am I ? Sometimes this is me but most of the time this is me Hehe

Post #758058

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