choosing a file system

Patrick Boutilier boutilpj at
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
>> 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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