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04 March 2009 22:35

NTFS Fragmentation may be more harmful than you think

I’ve posted previously about the adverse affect of ntfs fragmentation and I’ve also mentioned that it is sometimes suggested that fragmentation is not a concern on a SAN. I’ve yet to finish testing this on a SAN, after all you don’t often get a free play...
Posted by GrumpyOldDBA | 1 comment(s)
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14 January 2009 20:09

Tracking contention on the SAN - testing Times

One hotly disputed topic on SAN performance is the matter of contention. This may materialise in the fabric due to over subscription or excessive fan in. A fibre channel fabric is a network which connects servers and storage through switches, just like...
Posted by GrumpyOldDBA | 1 comment(s)
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23 November 2008 22:31

Testing Times 3

( I was on holiday for three weeks so sorry for the delays ) In my previous posts I briefly mentioned the task in establishing a method to benchmark a SQL Server new build or migration. This hasn't been an easy task by any means and I am under pressure...
Posted by GrumpyOldDBA | with no comments
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07 October 2008 15:41

Testing Times 1

It's an interesting time with being asked to performance test/benchmark a new server setup for a migration of sql server and data centre. Both current and new servers are SAN attached and it has been what is effectively the testing of the storage...
Posted by GrumpyOldDBA | 2 comment(s)
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03 April 2008 12:53

Disk Partition Alignment ( SANs and Diskpart )

As a further post to my series on what else can affect SQL Server Performance here’s the thorny issue of disk partition alignment. Disclaimer : I don’t get to configure SANs, places I work have dedicated teams and it’s unlikely a DBA would be considered...
Posted by GrumpyOldDBA | 4 comment(s)
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19 September 2007 11:34

Are your SAN drives performing well?

Those that know me know that I consider SAN's to be one of the major bottlenecks to high performance SQL Server databases; certainly my experience over the years has often shown this to be the case - however that's a whole other area for discusion, what...
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