Cyrus imap server and filesystem type.

Josef Karliak karliak at
Tue Oct 4 04:57:16 EDT 2011

   I'm only asking, I'll migrate from old server to a new one. If are  
there a better filesystems (with a dissaster recovery -emails are VERY  
important for users), it is a time and place to migrate.
   Now, on HP DL380G, we've sometimes high waits of processes, 3500  
mail users on 300GB SCSI mirrored disk. Also we use SAN storage,  
synchronized by rsync. SAN storage is now only for copy, on the new  
server we plan to use it actively. That's why I asking too - is Reiser  
on SAN good ? Or ZFS ? Or EXT4 ? And it's disaster recovery (repairing  

Cituji Eero Hänninen <fax at>:

> Hi..
>> On 10/03/2011 12:58 PM, Josef Karliak wrote:
>>>   Hi there,
>>>   what filesystem type do you use for Cyrus imapd ? I use SLES11x64
>>> (or opensuse 11.4).
>>>   I use Reiserfs3.6, so far so good. But couldn't be better ? :)
> I have time to time bad experiences with ReiserFS 3.6. Soon or latter
> some data corruption happens, and if reiser becomes broken then its
> broken after repair too. May be its kernel related or my personal
> problem.
> Currently our old mail infra is using xfs and ext4, and it seems work
> fine with our load. XFS needs careful tuning before it gets perform like
> on creation log size, block size etc, and on mounting increase logbufs
> to 8 (default 1). And of course don't forget increase number of inodes.
> Future plan is change hardware and mail system architecture, so we move
> to ZFS (on FreeBSD) , as current stress tests shows good results on test
> servers. But lets see how it will be work with about 1.2m users real
> work load.
> About Your thread, why you are asking, just for sure that you have made
> good choice or you have some kind performance problems? :)
> Best Regards,
> Eero
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