Recommended Filesystems?

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Recommended Filesystems?
\ Patrick - South Valley Internet (22 Jul 2007)
. \ mouss (22 Jul 2007)
. \ Matthias Andree (22 Jul 2007)
. . \ Ralf Hildebrandt (22 Jul 2007)
. . . \ Patrick - South Valley Internet (22 Jul 2007)
. . . . \ Matthias Andree (9 Aug 2007)
. \ Julian Cowley (22 Jul 2007)
. . \ Angelos Karageorgiou (23 Jul 2007)
. . . \ Christopher E. Brown (23 Jul 2007)
. . . . \ Patrick - South Valley Internet (23 Jul 2007)
. . . . . \ Christopher E. Brown (4 Aug 2007)
. . . \ (Wietse Venema) (23 Jul 2007)
. . . \ Patrick - South Valley Internet (23 Jul 2007)
. . . . \ Angelos Karageorgiou (24 Jul 2007)
. \ Christopher E. Brown (23 Jul 2007)
. . \ (Wietse Venema) (23 Jul 2007)
. . . \ Christopher E. Brown (4 Aug 2007)
. . . . \ (Wietse Venema) (4 Aug 2007)
. . . . . \ Christopher E. Brown (5 Aug 2007)
. . . . . . \ (Wietse Venema) (5 Aug 2007)
. . \ Patrick - South Valley Internet (23 Jul 2007)
. . . \ Angelos Karageorgiou (24 Jul 2007)
. . . . \ Christopher E. Brown (4 Aug 2007)

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Subject:	Recommended Filesystems?
Group:	Postfix-users
From:	Patrick - South Valley Internet
Date:	22 Jul 2007

Hi all,

I am in the process of building a load balanced e-mail server that
mounts the Mail Spool and /home directories via NFS from a dedicated NFS
server. I've been reading a lot of information about certain
filesystems and Postfix, but nothing I read is in regards to what
filesystem to use when using NFS to mount the filesystem.

So far it looks like XFS and ext3 are the two choices I've seen
recommended. Currently I installed Ubuntu 6.06LTS onto the NFS server
just so I can easily test out XFS. I've seen some bonnie++ results such as:

http://adria.fesb.hr/~jsosic/mojbench.html

Which state XFS is a good filesystem to use. This however does not talk
about it being used with Postfix and Dovecot.

On another web site I saw some performance charts about how XFS
outperforms all other filesystems in Postfix using Ubuntu 6.06.

http://piao-tech.blogspot.com/2007/04/file-system-benchmarks-for-postfix-mail.ht ml

I also saw Ralph's web site:

http://www.arschkrebs.de/postfix/postfix_ext3.shtml

Which says ext3 is the way to go (well, I didn't see any other
filesystem recommendations, so I'm assuming).

Both of the mail servers are using CentOS 4.5 with an ext3 filesystem.
Each machine has the mail queue folder in an ext3 filesystem as well.
If ext3 is the better filesystem to use for Postfix and Dovecot, then
the NFS server will have Ubuntu removed and CentOS 4.5 put back on it.

Also, if anyone has experience with NFS mounts and would love to let me
know what they found to be a good read and write size when mounting the
NFS mountpoint, I'd love to hear them. Currently I am using 16384 for
both rsize and wsize.

Any and all suggestions are welcomed. Thanks in advance.

Patrick