Anyone using Linux LVM with cyrus?

[Hans Wilmer]

On Wed, Feb 05, 2003 at 04:36:03PM -0400, Patrick Boutilier wrote:

> We are using LVM to give the ability to add disk space and expand our 
> reiserfs when necessary.

Is it possible to add disc space with ext3fs and LVM, too?

> We are using LVM on top of hardware RAID 5 so as long as 2 disks don't 
> fail at once we should be OK.

Hm, sounds nice :)

To be more specific, what I've in mind is a setup like that, for
60--100 users:


+  18 or 36 GB SCSI: system itselfe and about 20--25 GB /var for
   incoming/outgoing mail (incl. virus scanning) and the more actively
   used part of the cyrus mail store, quota of about 100 MB/user or
   10 GB shared by the user.* hierarchy on it

+  120 GB IDE to keep another cyrus mail store partition (archive)
   Users should move older mail from the default partition to
   the archive. Some shared folders will probably reside on the IDE
   discs, too. The archives will provide a quota of 1 GB/user.


Two identical 120 GB IDE discs should be used to keep and mirror the
archive. The SCSI disc should be mirrored also (at least the /var
partition), though I'm not sure yet whether it's better to use a
second SCSI disc for that or if it's a good idea to divide the IDEs
into partitions of 100 GB and 20 GB each, so that the SCSI disc can be
mirrored to the 20 GB partitions on the IDEs.

Daily backups will probably be done to another 120 GB IDE disc. I'll
use ext3fs for all partitions --- reiserfs or even xfs may have
advantages, but I like ext3 more, and the expected number of files
that have to be handled should be still ok for ext3.

Is this a reasonable setup, and can it reliably be done with LVM? Or
is it better to use raidtools2 for it?

Or would you suggest to use hardware IDE RAID instead, maybe by
forgoing SCSI?

Any suggestions are appreciated --- I don't know how flexible LVM can
make things, so a totally different setup might be even better.


GH