[Lustre-discuss] Multiple MDTs with Lustre 1.6?

Andreas Dilger adilger at clusterfs.com
Fri Oct 12 12:38:05 PDT 2007


On Oct 12, 2007  11:50 -0700, Klaus Steden wrote:
> Neither of these is something that can be easily accomplished from
> /etc/fstab, I would have to implement the failover functionality described
> in the link you sent, correct?

Correct.  If you are using failover then you also need to have the HA
software manage the filesystem mounting.  With 1.6 this is relatively
easy, as filesystem failover is a fairly standard configuration (ala
NFS server failover also).

> On 10/12/07 11:21 AM, "Kilian CAVALOTTI" <kilian at stanford.edu>did etch on
> stone tablets:
> > On Friday 12 October 2007 11:15:16 am Klaus Steden wrote:
> >> > Heheheh, I figured.
> >> >
> >> > What about mounting OST targets from multiple hosts, i.e. OST0000 and
> >> > OST0001 on both oss-0-0 and oss-0-1? Just as bad?
> > 
> > Yep, for the same reasons.
> > 
> > If you want redundancy for your OSTs, you can have a kind of
> > active/active setup where oss-0-0 would be active for OST0000 and
> > passive for OST0001, and oss-0-1 would be passive for OST0000 and
> > active for OST0001.


Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.




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