On Wed, 2018-09-05 at 13:37 -0400, Frederick Stock wrote: > Another option for saving space is to not keep 2 copies of the > metadata within GPFS. The SSDs are mirrored so you have two copies > though very likely they share a possible single point of failure and > that could be a deal breaker. I have my doubts that RAID5 will > perform well for the reasons Marc described but worth testing to see > how it does perform. If you do test I presume you would also run > equivalent tests with a RAID1 (mirrored) configuration. >
When you have been on the wrong end of a double disk failure in a RAID1 when the second disk failed during the rebuild you probably want to steer clear of such recklessness on a multi TB GPFS file system :-) JAB. -- Jonathan A. Buzzard Tel: +44141-5483420 HPC System Administrator, ARCHIE-WeSt. University of Strathclyde, John Anderson Building, Glasgow. G4 0NG _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
