TRIM in centos 5.X?

Posted by Frank Farmer on Server Fault See other posts from Server Fault or by Frank Farmer
Published on 2011-11-30T00:03:36Z Indexed on 2011/11/30 1:54 UTC
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Filed under:

centos

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ssd

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trim

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intel-x25

I've got a bunch of centos 5 boxes with Intel X-25 drives (x25-m in dev, x25-e in prod, I think). We're seeing severely degraded disk performance on one of our dev boxes (which easily does 5+ gb of writes every day, meaning we write the full drive's worth of data several times a month).

The box in question:

Intel x25-m
Ext3 (which doesn't support TRIM)
centos 5
vmware ESXi

Wikipedia mentions that newer versions of hdparm (which centos5 doesn't include) can bulk-TRIM free blocks. This utility also sounds potentially useful: http://blog.patshead.com/2009/12/a-quick-and-dirty-wipersh-fix-for-intel-x25-m.html

Disk write performance has dropped to <1 MB/sec while copying a 300 meg directory on this system, as of a month or so ago -- it used to be able to perform the same copy operation at least 5 times faster.

What can I do to recover performance on this system?

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