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
