[Ocfs2-users] Ocfs2-users Digest, Vol 96, Issue 6

[David Johle]

On your dmesg output I see this on all devices:
Write cache: disabled

On your cat /proc/mounts output I see this on all mounts:
data=ordered


So you have the slower data writing method with no caching going 
on.  I'm not surprised in the least that it's going so slow!

I suggest data=writeback on the mount options, and figure out how get 
your devices to have write caching enabled.

Also check within the storage system itself for various caching 
options, especially enabling write caching.  And write-back caches 
will give even better performance than write-through if it gives you 
a choice between those.


At 02:00 PM 12/3/2011, Marek Kr?likowski wrote:
>Message: 1
>Date: Sat, 3 Dec 2011 20:32:30 +0100
>From: Marek Kr?likowski <admin at wset.edu.pl>
>Subject: [Ocfs2-users] Slow OCFS2 on very high-end hardware
>To: <ocfs2-users at oss.oracle.com>
>Message-ID: <6EB9AEE0D0994A44AA1BBEFC6B848B3A at SERWER>
>Content-Type: text/plain; charset="iso-8859-2"
>
>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...
>This is my first ocfs2 cluster so i am 100% sure i do something  wrong.....