Hopefully this is an acceptable way to avoid thread jacking, by renaming the subject… On Jan 30, 2014, at 10:58 PM, Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx> wrote: > > RAID60 is a nested RAID level just like RAID10 and RAID50. It is a > stripe, or RAID0, across multiple primary array types, RAID6 in this > case. The stripe width of each 'inner' RAID6 becomes the stripe unit of > the 'outer' RAID0 array: > > RAID6 geometry 128KB * 12 = 1536KB > RAID0 geometry 1536KB * 3 = 4608KB My question is on this particular point. If this were hardware raid6, but I wanted to then stripe using md raid0, using the numbers above would I choose a raid0 chunk size of 1536KB? How critical is this value for, e.g. only large streaming read/write workloads? If it were smaller, say 256KB or even 32KB, would there be a significant performance consequence? Chris Murphy _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
