On 06/03/12 21:17, Yeb Havinga wrote:
One thing to note is that linux software raid with md doesn't support discard, which might shorten the drive's expected lifetime. To get some numbers I tested the raid 1 of ssd's setup for mediawear under a PostgreSQL load earlier, see http://archives.postgresql.org/pgsql-general/2011-11/msg00141.php
Right, which is a bit of a pain - we are considering either formatting the drive with less capacity and using md RAID 1 or else doing the mirror in LVM to enable a working discard/trim.
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