We at our site have 3 filesystems sharing one MGS and importantly have got one node serving all the MDTs w/o any problems.
2010/11/23 Kevin Van Maren <[email protected]> > Wang Yibin wrote: > > Hello, > > > > 在 2010-11-19，上午3:21， Thomas Johansson 写道： > > > >>> I am not sure I understand - Do you have multiple filesystems > >>> sharing the > >>> same MGS? > >> > >> Yes 5 filesystems on 4 OSS:s and 2 MDS in active/passive failover. > >> Some 100 TB of space in total. > > > > Probably you misunderstood me. You seems to be using 1 > > filesystem(MDSx2/OSSx4) with 5 clients. > > Making 5 lustre filesystems out of 4OSS/2MDS is a mission-impossible. > > No, while it is not often done, there is nothing to prevent 5 Lustre > file systems from running on 4 OSS nodes and 2 MDS nodes. > In addition to the MGS, each file system needs one MDT and 1 or more > OSTs. An OSS can serve up OSTs for multiple file systems, and an MDS > node can serve up MDTs for multiple file systems (and a node could even > be both an MDS and OSS at the same time). > > Now, if there were a separate MGS for each file system, then it would be > a different story... each node can really only serve up OSTs or MDTs for > a single MGS. > > Kevin > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss > -- Regards-- Rishi Pathak National PARAM Supercomputing Facility Center for Development of Advanced Computing(C-DAC) Pune University Campus,Ganesh Khind Road Pune-Maharastra
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