Since you were already using filebench, you could use the 'singlestreamwrite.f' and 'singlestreamread.f' workloads (with nthreads set to 20, iosize set to 128k) to achieve the same things.
With the latest version of filebench, you can then use the '-c' option to compare your results in a nice HTML friendly way. eric On Oct 9, 2007, at 9:25 AM, Thomas Liesner wrote: > i wanted to test some simultanious sequential writes and wrote this > little snippet: > > #!/bin/bash > for ((i=1; i<=20; i++)) > do > dd if=/dev/zero of=lala$i bs=128k count=32768 & > done > > While the script was running i watched zpool iostat and measured > the time between starting and stopping of the writes (usually i saw > bandwth figures around 500...) > The result was 409 mb/s in writes. Not too bad at all :) > > Now the same with sequential reads: > > #!/bin/bash > for ((i=1; i<=20; i++)) > do > dd if=lala$i of=/dev/zero bs=128k & > done > > again checked with zpool iostat seeing even higher numbers around > 850 and the result was 910mb/s... > > wow.... > that all looks quite promising :) > > Tom > > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
