zpool scrub speed

Jean-Michel Bruenn jean.bruenn at ip-minds.de
Fri May 6 06:49:23 EDT 2011


 scan: scrub in progress since Fri May  6 12:43:44 2011
    87.7G scanned out of 204G at 271M/s, 0h7m to go
    0 repaired, 43.05% done
config:

        NAME        STATE     READ WRITE CKSUM
        storage     ONLINE       0     0     0
          raidz1-0  ONLINE       0     0     0
            sda4    ONLINE       0     0     0
            sdb3    ONLINE       0     0     0
            sdc3    ONLINE       0     0     0
          raidz1-1  ONLINE       0     0     0
            sdd1    ONLINE       0     0     0
            sde1    ONLINE       0     0     0
            sdf1    ONLINE       0     0     0


On Fri, 06 May 2011 09:07:29 +0100
Gordan Bobic <gordan.bobic at gmail.com> wrote:

> What is the general performance expected from zfs scrub? I would have 
> expected it to be in the region of the combined read speed of the data 
> bearing disks (i.e. excluding the parity disks). But my 13 disk array 
> only gets about 170MB/s on a scrub. Is this normal, i.e. explained by 
> the disk-seeking required?
> 
> Gordan


-- 
Jean-Michel Bruenn <jean.bruenn at ip-minds.de>



More information about the zfs-discuss mailing list