choosing a file system
boutilpj at ednet.ns.ca
Mon Jan 5 13:57:46 EST 2009
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
> how do you move the cyrus* files onto other drives?
metapartition_files and metapartition-default imapd.conf options in
> David Lang
> Cyrus Home Page: http://cyrusimap.web.cmu.edu/
> Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
> List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
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