[Ocfs2-users] Slow OCFS2 on very high-end hardware

[Joel Becker]

On Sat, Dec 03, 2011 at 08:32:30PM +0100, Marek Królikowski wrote:
> Hello
> Today i create a cluster with OCFS2.
> I name servers MAIL1 and MAIL2
> Both connect via HBA card with 2 links 4Gbit/s and EMC storage with FC RAID10.
> Both connect to this same Cisco switch 1Gbit/s line.
> Hardware is awsome but ocfs2 work verrrry slow.
> I use Gentoo Linux with Kernel 3.0.6 and ocfs2-tools-1.6.4 that will be postfix/imap/pop3 cluster with maildir support so there will be many many directores and little files.
> I link /home to my ocfs2 and do few tests but work verry slow...
> When i write any file on server MAIL1 and try check mailbox from MAIL2 working amazing slow...

	I've gotta ask, what is "amazingly slow" to you?  A cluster
filesystem accessing the same files from two places necessarily is
slower than local access.  But if it is slow enough that you notice it
by hand, it's probably something in configuration.
	Did you select the 'mail' filesystem type when creating the
filesystem?  This probably shouldn't affect your simple test, but it
will absolutely help as your system grows.

> MAIL1 ~ # cat /proc/mounts
> /dev/mapper/EMC /mnt/EMC ocfs2 rw,relatime,_netdev,heartbeat=local,nointr,data=ordered,errors=remount-ro,usrquota,coherency=full,user_xattr,acl 0 0
> MAIL2 ~ # cat /proc/mounts
> /dev/mapper/EMC /mnt/EMC ocfs2 rw,relatime,_netdev,heartbeat=local,nointr,data=ordered,errors=remount-ro,usrquota,coherency=full,user_xattr,acl 0 0

	Your hardware looks just fine, though I have to ask why you have
device-mapper in there.  Is it just for multipath support, or are you
doing other things?

Joel


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