On 1/31/2014 12:35 AM, Chris Murphy wrote: > 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? You say 'if it were smaller...256/32KB'. What is "it" referencing? -- Stan _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
