Re: Trying to understand iostat output

[kami petersen <kokamomi_(_at_)_gueststars_(_dot_)_net>]

Markus Wernig skrev:
> I have a system (obsd3.8/sparc64) with 2 identical scsi drives (4
> partitions + 1 swap each). The largest partition (10G) is mirrored over
> the 2 drives as a ccd with interleave factor 16.

> And 1.2M/s is rather less that what I'd have expected, is this figure
> really the disk transfer rate?

my personal experience is that 16 is way too small. spend a few hours 
benchmarking at increasing interleaves, and then make your decision. for 
a 2 scsi disk system i ended up with an interleave of 312, judged on the 
basis of bonnie benchmarking, wich lets you trade off raw speed, small 
writes and cpu load.

/kami