[Stgt-devel] ibmvio is slow

Bastian Blank waldi
Tue Aug 14 21:21:38 CEST 2007


On Tue, Aug 14, 2007 at 03:07:02PM -0400, Ming Zhang wrote:
> try simple dd on a raw device (no fs) and see the performance. if write
> result is much better and u do not see read in iostat, u meet an align
> issue simply like what we had in IET list.

Does not help.

| Device:         rrqm/s   wrqm/s     r/s     w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
| sdb            2493.21  3600.20  359.64  121.78 22810.79 30863.54   111.49   126.38  267.37   2.08  99.94

Bastian

-- 
Where there's no emotion, there's no motive for violence.
		-- Spock, "Dagger of the Mind", stardate 2715.1



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