We've just added 9 raid volumes to our main storage, (5 Raid6 arrays for data and 4 Raid1 arrays for metadata)
We are now attempting to rebalance and our data around all the volumes. We started with the meta-data doing a "mmrestripe -r" as we'd changed the failure groups to on our meta-data disks and wanted to ensure we had all our metadata on known good ssd. No issues, here we could take snapshots and I even tested it. (New SSD on new failure group and move all old SSD to the same failure group) We're now doing a "mmrestripe -b" to rebalance the data accross all 21 Volumes however when we attempt to take a snapshot, as we do every night at 11pm it fails with sudo /usr/lpp/mmfs/bin/mmcrsnapshot home test Flushing dirty data for snapshot :test... Quiescing all file system operations. Unable to quiesce all nodes; some processes are busy or holding required resources. mmcrsnapshot: Command failed. Examine previous error messages to determine cause. Are you meant to be able to take snapshots while re-striping or not? I know a rebalance of the data is probably unnecessary, but we'd like to get the best possible speed out of the system, and we also kind of like balance. Thanks -- Peter Childs ITS Research Storage Queen Mary, University of London _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
