Here is another example of the performance problems I am seeing: ~# dd if=/dev/zero of=/pool0/ds.test bs=1024k count=2000 2000+0 records in 2000+0 records out 2097152000 bytes (2.1 GB) copied, 56.2184 s, 37.3 MB/s
37MB/s seems like some sort of bad joke for all these disks. I can write the same amount of data to a set of 6 SAS disks on a Dell PERC6/i at a rate of 160MB/s and those disks are hosting 25 vm's and a lot more IOPS than this box. zpool iostat during the same time shows: pool0 14.2T 25.3T 124 1.30K 981K 4.02M pool0 14.2T 25.3T 277 914 2.16M 23.2M pool0 14.2T 25.3T 65 4.03K 526K 90.2M pool0 14.2T 25.3T 18 1.76K 136K 6.81M pool0 14.2T 25.3T 460 5.55K 3.60M 111M pool0 14.2T 25.3T 160 0 1.24M 0 pool0 14.2T 25.3T 182 2.34K 1.41M 33.3M The zero's and other low numbers don't make any sense. And as I mentioned- the busy percent and service times of these disks are never abnormally high- especially when compared to the much smaller, better performing pool I have. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
