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 SQL Data missing during backup
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United Kingdom
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Posted - 05/03/2014 :  01:32:52  Show Profile  Reply with Quote

Please could you help me with the following.
We have a SQL Server 2008 running as a virtual machine in ESXi 5.1
The machine is backed up daily by backup exec 2012
During the backup events the IO is frozen and the after that the
IO is resumed.

My problem is this

During this time of 14 seconds +- the data that comes in to the database server seems to be thrown away.

When we look at the trends using the data we can see the signals drop off for the time and then come back again.

Is this the way it should work or have we forgotten to set something.

Really appreciate your taking time to assist


Almighty SQL Goddess

38200 Posts

Posted - 05/06/2014 :  15:27:26  Show Profile  Visit tkizer's Homepage  Reply with Quote
Are you separately backing up the databases in SQL Server? If so, you need to exclude the SQL Server backups. If you aren't, then you need to make sure Backup Exec is configured properly. It should not be backing up the mdf/ldf/ndf/etc files. It should instead be running SQL Server backups.

Regarding data being thrown away, I would think that's due to the IO being frozen and the application's timeout value. You need to determine if the queries are failing, timing out, etc. Run a trace to see what's going on.

Tara Kizer
SQL Server MVP since 2007
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Starting Member

1 Posts

Posted - 05/08/2014 :  16:38:18  Show Profile  Reply with Quote
Make sure SQL utilities are not being ran during the backup

Lenora Moss
Backup Exec Technical Support Engineer
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