olshanlaw
Contributor
Contributor

Why the MSA1500 w/FC Drives Slow

Exchange and SQl runs very slow..I really don't know what to do at this time.

I have 4 host server on HP DL 380 G5 and 3 MSA 30. How can I tweak the SAN to perform better.

Note, that I have only one controller.

PS:: attached, please find array diagnastic report.

Please advise

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3 Replies
weinstein5
Immortal
Immortal

It might not be the SAN but the fact you have only a single controller and are saturating the the controller because SQL and Exchange are rather data intensive. What type of controller do you have?

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olshanlaw
Contributor
Contributor

It's a MSA 1500cs

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COS
Expert
Expert

Are you using SCSI disks or SATA? SCSI is rather slow and running SQL & Esch makes it very very slow. I don't know what the backend controller interface is to each disk but from my experince SCSI MSA Type HP disk storage just does not have the horse power for SQL & Exch.

Have you checked to see if the controller interface is getting hammered?

The only thing I can think of is make sure your RAID set uses the best performing RAID config and use either 64KB or 128KB block sizes when you build the RAID sets. On the VM's format the data disks using 16K or 32K or 64K cluster sizes. Using the default 512 in the VM will kill your performance. Also, if you have RAM to spare use it all.

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