zfs discuss - Feb 2010 - slow zfs scrub?

hi all

I have a server running svn_131 and the scrub is very slow. I have a cron job
for starting it every week and now it''s been running for a while, and
it''s very, very slow

 scrub: scrub in progress for 40h41m, 12.56% done, 283h14m to go

The configuration is listed below, consisting of three raidz2 groups with seven
2TB drives each. The root fs is on a pair of X25M (gen 1) SSDs and another set
of similar SSDs be used for Zil and L2ARC (mirror for zil and stripe for l2arc).

Is this correct behaviour? according to the zpool status, opensolaris is
supposed to use something like 14 days to scrub the dpool...

roy
        NAME         STATE     READ WRITE CKSUM
        dpool        ONLINE       0     0     0
          raidz2-0   ONLINE       0     0     0
            c7t2d0   ONLINE       0     0     0
            c7t3d0   ONLINE       0     0     0
            c7t4d0   ONLINE       0     0     0
            c7t5d0   ONLINE       0     0     0
            c7t6d0   ONLINE       0     0     0
            c7t7d0   ONLINE       0     0     0
            c8t0d0   ONLINE       0     0     0
          raidz2-1   ONLINE       0     0     0
            c8t1d0   ONLINE       0     0     0
            c8t2d0   ONLINE       0     0     0
            c8t3d0   ONLINE       0     0     0
            c8t4d0   ONLINE       0     0     0
            c8t5d0   ONLINE       0     0     0
            c8t6d0   ONLINE       0     0     0
            c8t7d0   ONLINE       0     0     0
          raidz2-2   ONLINE       0     0     0
            c9t0d0   ONLINE       0     0     0
            c9t1d0   ONLINE       0     0     0
            c9t2d0   ONLINE       0     0     0
            c9t3d0   ONLINE       0     0     0
            c9t4d0   ONLINE       0     0     0
            c9t5d0   ONLINE       0     0     0
            c9t6d0   ONLINE       0     0     0
        logs
          mirror-3   ONLINE       0     0     0
            c10d1s0  ONLINE       0     0     0
            c11d0s0  ONLINE       0     0     0
        cache
          c10d1s1    ONLINE       0     0     0
          c11d0s1    ONLINE       0     0     0
        spares
          c9t7d0     AVAIL   


Vennlige hilsener

roy
--
Roy Sigurd Karlsbakk
(+47) 97542685
roy at karlsbakk.net
http://blogg.karlsbakk.net/
--
I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er
et element?rt imperativ for alle pedagoger ? unng? eksessiv anvendelse av
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On Sat, 27 Feb 2010, Roy Sigurd Karlsbakk wrote:
> hi all
>
> I have a server running svn_131 and the scrub is very slow. I have a 
> cron job for starting it every week and now it''s been running for
a
> while, and it''s very, very slow
Have you checked the output of ''iostat -xe'' to see if there
are
unusually slow (or overloaded) disks or increasing error counts?  Is 
the CPU load unusually high?

Bob
--
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/