Re: SSD + RAID

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Merlin Moncure wrote:
But what's up with the 400 iops measured from bonnie++?
I don't know really. SSD writes are really sensitive to block size and the ability to chunk writes into larger chunks, so it may be that Peter has just found the worst-case behavior and everybody else is seeing something better than that.

When the reports I get back from people I believe are competant--Vadim, Peter--show worst-case results that are lucky to beat RAID10, I feel I have to dismiss the higher values reported by people who haven't been so careful. And that's just about everybody else, which leaves me quite suspicious of the true value of the drives. The whole thing really sets off my vendor hype reflex, and short of someone loaning me a drive to test I'm not sure how to get past that. The Intel drives are still just a bit too expensive to buy one on a whim, such that I'll just toss it if the drive doesn't live up to expectations.

--
Greg Smith    2ndQuadrant   Baltimore, MD
PostgreSQL Training, Services and Support
greg@xxxxxxxxxxxxxxx  www.2ndQuadrant.com


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