On Tue, 2007-08-14 at 21:21 +0200, Bastian Blank wrote: > 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 > ok. then that is not the cause. > Bastian > -- Ming Zhang @#$%^ purging memory... (*!% http://blackmagic02881.wordpress.com/ http://www.linkedin.com/in/blackmagic02881 -------------------------------------------- |