Well, I checked and it is 8k volblocksize 8K Any other suggestions how to begin to debug such issue ?
On Mon, Dec 15, 2008 at 2:44 AM, Bob Friesenhahn < bfrie...@simple.dallas.tx.us> wrote: > On Mon, 15 Dec 2008, Ahmed Kamal wrote: > >> >> RandomWrite-8k: 0.9M/s >> SingleStreamWriteDirect1m: 5.8M/s (??) >> MultiStreamWrite1m: 33M/s >> MultiStreamWriteDirect1m: 11M/s >> >> Obviously, there's a major hit. Can someone please shed some light as to >> why >> this is happening ? If more info is required, I'd be happy to test some >> more >> ... This is all running on osol 2008.11 release. >> > > What blocksize did you specify when creating the zvol? Perhaps UFS will > perform best if the zvol blocksize is similar to the UFS blocksize. For > example, try testing with a zvol blocksize of 8k. > > Bob > ====================================== > Bob Friesenhahn > bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ > GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ >
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