Thanks for everybody, perfect timing when I got this email coz we have a
problem restoring large database. The restore was successful after we
modified the value of this option from 300 to 18000 in TSM server.
Regards,
-----Original Message-----
From: Vladimir Zykov [mailto:vzykov AT COMPUTEL DOT RU]
Sent: Monday, June 02, 2003 2:04 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: TDP 4 MSSQL restore
Thanks, Del
I've increased COMMTIMEOUT up to 5 hrs.
Restore went OK.
----- Original Message -----
From: "Del Hoobler" <hoobler AT US.IBM DOT COM>
To: <ADSM-L AT VM.MARIST DOT EDU>
Sent: Friday, May 30, 2003 10:24 PM
Subject: Re: TDP 4 MSSQL restore
> Vladimir,
>
> Yes. I know what the problem is.
>
> There is a known situation that you must handle
> when restoring very large SQL databases.
>
> Basically, this is what happens:
>
> 1. The database is started to be restored.
> A small amount of data is restored from the TSM Server.
>
> 2. The SQL server looks at that data and sets up the database
> according to the information that it finds in first part
> of the backup data. The SQL Server preformats the files.
> If the database is large... the preformatting and initialization
> of the files could take a long time. The SQL Server is spending
> most of the time preformatting the files.
>
> 3. After the SQL Server is done preformatting the files,
> it continues restoring the rest of the data.
>
> The SQL Server is still working to preformat the files
> when the COMMTIMEOUT on the server times out and cancels
> the operation.
>
>
> The way to get around this issue is to increase the
> COMMTIMEOUT value to something very large.
> It needs to be large enough to allow the SQL Server
> to finish preformatting the files.
>
> Increase the COMMTIMEOUT to something very large
> (like 5 hours which is 18000 seconds)
>
> then... retry the restore.
>
>
> This is known issue and there is a requirement opened
> against the TSM Server to allow COMMTIMEOUT
> to be set on a NODENAME basis... since you don't
> normally want to set COMMTIMEOUT that large
> for all nodes.
>
> By the way, it is also documented in the IBM Support Solutions
> Database under reference # 1079494.
>
> Thanks,
>
> Del
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