NFSv4, anyone?

[Janne Peltonen]

On Mon, Nov 27, 2006 at 02:31:21AM -0800, Nikola Milutinovic wrote:
> > > I tried GFS yesterday, that worked fine too, but I just mounted the 
> > > volume just on one box (no real cluster) so it was a lousy test 
> > > anyway... (I could try it later, if I can find some time.)
> 
> > I was, of course, extremely interested in this. So I tried with GFS on
> > my two node cluster, and, much to my disappointment, got some errors.
> > But the errors didn't look as if they had anything to do with file
> > locking of anything such, so I tried the same test on a local (ext3)
> > filesystem. And got the same errors. So apparently I'm just not giving
> > enough resources to Cyrus (the errors in question were of the format
> 
> Are you trying to access the same imap spool with TWO cyrus instances
> at the same time?
> 
> THAT will not work! One logical/virtual/actual IMAP spool can be
> controlled by one instance at the time. So, GFS can give you fail-over
> cluster, unless the computer nodes are clustered themselves,
> transparently to Cyrus.

It will work, and does work. See the numerous threads on that subject on
this list. To get you started:

 http://www.mail-archive.com/info-cyrus@lists.andrew.cmu.edu/msg30675.html


--Janne Peltonen