I have a relatively new box here running Ubuntu with ZFS-on-Linux across an 18-disk array. The first couple of times I did a zpool scrub
, it seemed like everything worked nicely, but the last several times I've tried, it completely trashes the system - when I can get it to do anything at all, it's reporting a load average of 20-50, and most of the time it's just unresponsive.
This isn't expected behavior is it? Is there some configuration I can change to make this less awful?
Update:
- Hardware configuration is basically http://www.45drives.com/products/storage/s45-lite.php
- 18 6TB disks connected via a HighPoint R750 HBA.
- Ubuntu 14.04 LTS, Linux 3.19 kernel.
- Pool is currently around 50% full.
- No deduplication.
- [Update 2]: disks are arranged in 2 RAIDZ (single-parity) vdevs with 9 disks each.