FYI, I'm using Lustre 1.8.5 to mount two filesystems from separate domains (one in Lafayette, IN, and one in Bloomington, IN, run by two different institutions) on 900+ nodes, and things just work.
-- Mike Shuey On Tue, Mar 15, 2011 at 6:24 PM, Andreas Dilger <adil...@whamcloud.com> wrote: > On 2011-03-15, at 4:19 PM, Malcolm Cowe wrote: >> On 15/03/2011 17:15, Brian O'Connor wrote: >>> What are the constraints on a client mounting more than one lustre >>> file system? >>> >>> I realise that a lustre cluster can have more than one file system >>> configured, but can a client mount different file systems from different >>> lustre clusters on the same network?;ie. >>> >>> Assume a Single IB fabric and two Lustre clusters with separate >>> MGS/MDS/OSS. One lustre is Lincoln and the other is Washington >>> >>>> list_nids >>> 192.168.1.10@o2ib >>> >>>> mount -t lustre lincoln:/lustre /lincoln >>>> mount -t lustre washington:/lustre /washinton >>> >>> Is this doable or should they be on separate IB fabrics >> >> From my understanding, there should only be one MGS for the entire >> environment (although as many MDTs and OSTs as are required). This is >> because clients will only communicate with exactly one MGS (and will >> communicate with the MGS of the last FS mounted) and will only receive >> updates from the MGS with which it is registered. So, in the above >> example if there is a change to the "lincoln" file system (e.g. a >> failover event, some configuration changes), clients will not receive >> notification. >> >> There's not an issue with having multiple MGS's on a site, only with >> mounting lustre file systems from multiple "domains" on the same client, >> IIRC. > > That discussion was had on the list a few months ago, and the correct answer > is that it should just work. The "only use last mounted MGS" problem was > fixed at some point, though I don't have the exact version handy. > > > Cheers, Andreas > -- > Andreas Dilger > Principal Engineer > Whamcloud, Inc. > > > > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss@lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-discuss > _______________________________________________ Lustre-discuss mailing list Lustre-discuss@lists.lustre.org http://lists.lustre.org/mailman/listinfo/lustre-discuss