David Lang wrote:
On Sat, 3 Jan 2009, Rob Mueller wrote:
But the new Solid-State-Disks seem very promising. They are claimed to
give 30x the throughput of a 15k rpm disk. If IO improves by 30 times
that should make all these optimizations unnecessary.
As my boss used to tell me ... Good hardware always compensates for
not-so-good software.
What we've found is that the meta-data (eg mailbox.db, seen db's, quota
files, cyrus.* files) use WAY more IO than the email data, but only use
1/20th the space.
By separating the meta data onto RAID1 10k/15k RPM drives, and the email
data onto RAID5/6 7.2k RPM drives, you can get a good balance of
space/speed.
how do you move the cyrus* files onto other drives?
metapartition_files and metapartition-default imapd.conf options in
cyrus-imapd 2.3.x
David Lang
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