Running a zpool scrub on our production pool is showing a scrub rate of about 400K/s. (When this pool was first set up we saw rates in the MB/s range during a scrub).
Both zpool iostat and an iostat -Xn show lots of idle disk times, no above average service times, no abnormally high busy percentages. Load on the box is .59. 8 x 3GHz, 32GB ram, 96 spindles arranged into raidz zdevs on OI 147. Known hardware errors: - 1 of 8 SAS lanes is down- though we've seen the same poor performance when using the backup where all 8 lanes work. - Target 44 occasionally throws an error (less than once a week). When this happens the pool will become unresponsive for a second, then continue working normally. Read performance when we read off the file system (including cache and using dd with a 1meg block size) shows 1.6GB/sec. zpool iostat will show numerous reads of 500 MB/s when doing this test. I'm willing to consider that hardware could be the culprit here- but I would expect to see signs if that were the case. The lack of any slow service times, the lack of any effort at disk IO all seem to point elsewhere. I will provide any additional information people might find helpful and will, if possible, test any suggestions. Thanks in advance, -Don _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
