[DRBD-user] recomended clustered filesystem

George H george.dma at gmail.com
Wed Jan 30 17:27:18 CET 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On 1/30/08, Greg Freemyer <greg.freemyer at gmail.com> wrote:
> On Jan 30, 2008 10:33 AM, George H <george.dma at gmail.com> wrote:
> > I'm going to be setting up a DRBD primary/primary setup and I
> > understand I need a cluster-fs. I've looked at several (GFS2, OCFS2,
> > OpenGFS, and LustreFS)
> >
> > Though I don't know which one is the most recomended. Personally I
> > don't know the difference between OpenGFS and GFS2 other than GFS2
> > seems to be done by RedHat and OpenGFS hasn't been touched since 2003.
> > I've heard things about LustreFS but never seen it mentioned for DRBD
> > (anyone tried it ?) Lastly OCFS2 ... it's free right ? :)
> >
> > Just need something that opensource and easy to maintain and upgrade
> > (if need be)
> I have not done any drdb / cfs work yet.  Not sure very many people really have.
> So this is generic CFS discussion, not drbd related:
> Ignore OpenGFS.  For details, read the wikipedia entry
> http://en.wikipedia.org/wiki/Global_File_System

Guess this puts OpenGFS out of the picture.

> Lustre is not really designed for small clusters.  ie. you implied 2
> nodes.  Lustre is for many more than that.

Yeah 2 mainly.. I may go with 4 but then I won't be using DRBD anymore if I do.

> So I think it is a choice of ocfs2 vs. gfs2
> OCFS2 has been in the vanilla kernel for a year or more, but it is
> missing some basic features you may miss. ie. no ACL support and I
> don't think it supports file locking.   It was really designed to
> offer just the functionality that Oracle needed for a clustered Oracle
> DB setup.  See the metadata table at
> http://en.wikipedia.org/wiki/Comparison_of_file_systems
> GFS2 has also been in the vanilla kernel for a year or more and is
> more of general purpose FS.  But since it is a Redhat developed FS, I
> suspect you won't find much distro support outside of Redhat.

I'm using Gentoo and they have GFS packages in the portage tree, plus
we build it from source anyways so I Don't think it would be a
problem. And yes I am looking for a general purpose FS. Stuff put home
dirs, mail spools, mysql dbs, and general OS stuff.

> And you failed to mention a intriqueing possibility.  OpenSSI and it
> its CFS.  They do have drbd integrated into that.  I'm not sure how
> stable that environment is.  I also don't know if that CFS is
> active/active, or more the traditional active/passive drdb setup.

I'l have to check OpenSSI out to see what it's about. Seems interesting.

Thanks Greg for your help, I'll be going for GFS2 it seems.

> Greg
> --
> Greg Freemyer
> Litigation Triage Solutions Specialist
> http://www.linkedin.com/in/gregfreemyer
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