[Linux-cluster] GFS Tunables

[Gordan Bobic]

Jos Vos wrote:
> On Thu, Oct 16, 2008 at 10:50:53AM -0500, Wendy Cheng wrote:
> 
>> Unless other GFS folks can give you more ideas, I think your best bet at
>> this moment is to think "outside" the box. That is, don't do
>> file-to-file backup if all possible. Check out other block level backup
>> strategies. Are Linux LVM mirroring and/or snapshots workable for you ?
>> Does your SAN vendor provide embedded features (e.g. Netapp SAN box
>> offers snapshot, snapmirror, syncmirror, etc) ?
> 
> What about GFS2?
> 
> We have similar problems, using GFS on a ftp server, where (for example)
> doing rsync's is almost impossible for large trees.
> 
> We tried some of the tuning suggestions you made in earlier mails and on
> your web pages on RHEL 5.l, but none of them had a substantial effect,
> only the tuning for making "df" more responsive worked.
> 
> We (while already having put part of our volumes on ext3 with NFS, a
> situation that is far from ideal for the cluster) are about to do some
> new tests.  One of the is trying GFS2 on one volume.
> 
> I'd appreciate if you can summarize (references to) the current
> (RHEL 5.2) tuning possibilities for GFS.  If there is nothing new,
> we want to start a test with GFS2.

Since you're experimenting, OCFS2 might be worth trying, on the 
offchance that it works better for your specific usage pattern.

Gordan