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Filegroups and files affecting database performance - survey


Filegroups and files affecting database performance - survey

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Igor Micev
Igor Micev
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Dear All,
I have asked on more question of survey-kind on this forum, and I was very pleasant of your answers.
We have a discussion on the following topics:
- Using one Filegroup and more files.
- Using more Filegroups with more files.

Every bank uses a different RAID, depending on the DBAs wishes. They use x64 systems all … Databases sizes ranges from 100GB to 400GB depending on the banks systems. The hardware is different of course.

The maintenance with both options is also subject on discussion. So, what do you think is better, or which situation with which option is better? … what is your experience?
Please be free to post about everything related with files and filegroups affecting database performance. You can also post links to articles about this…

Regards
IgorMi

Igor Micev,
SQL Server developer at Seavus
My blog: www.igormicev.com
GilaMonster
GilaMonster
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Group: General Forum Members
Points: 90415 Visits: 45284
It depends, no simple answer here.

Multiple files on the same RAID array, whether it be in the same filegroup or in different filegroups - no effect.
Multiple files on different RAID arrays, maybe an effect, depending whether or not the DB was IO bottlenecked or not and, if so, whether the particular part of the IO subsystem that is the bottleneck has been separated (if it's the switch or the HBA that's the bottleneck, just adding files on a different LUN but same switch and HBA won't help). In this case it's about scaling out IOs.

I'd suggest hitting google, there's lots of info out there

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

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