G'Day Victor, On Thu, Jun 26, 2008 at 03:09:04PM -0700, victor wrote: > Okay I got more information... > > I detached the second disk and starting benchmarking it. Here are the results. > > Write to zvol: > dd if=/dev/urandom of=/dev/zvol/rdsk/foo/ufs bs=1024k count=100 > 104857600 bytes (105 MB) copied, 86.3466 s, 1.2 MB/s > > Write to raw disk: > dd if=/dev/urandom of=/dev/rdsk/c5t1d0s0 bs=1024k count=100 > 100+0 records in > 100+0 records out > 104857600 bytes (105 MB) copied, 51.9522 s, 2.0 MB/s
Sorry - on slower systems you could get throttled by /dev/urandom; so long as ZFS compression is off, these tests will be better using if=/dev/zero. Brendan > Read from zvol: > [EMAIL PROTECTED]:/# dd if=/dev/zvol/rdsk/foo/ufs of=/dev/null bs=1024k > count=100 > 104857600 bytes (105 MB) copied, 4.30601 s, 24.4 MB/s > > Read from raw disk: > ptime dd if=/dev/rdsk/c1t0d0s0 of=/dev/null bs=1024k count=100 > 104857600 bytes (105 MB) copied, 1.13959 s, 92.0 MB/s @ 100 > > > This message posted from opensolaris.org > _______________________________________________ > opensolaris-discuss mailing list > [email protected] -- Brendan [CA, USA] _______________________________________________ opensolaris-discuss mailing list [email protected]
