choosing a file system

[David Lang]

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?

David Lang