Douglas Denny wrote:
On 12/4/06, James C. McPherson <[EMAIL PROTECTED]> wrote:
If you look into your /var/adm/messages file, you should see
more than a few seconds' worth of IO retries, indicating that
there was a delay before panicing while waiting for the device
to return.
My original post contains all the warnings. The first error happened
at 20:30:21 and the system paniced at 20:30:21. It makes me wonder if
there is something else going here.
That's surprising. My experience of non-redundant pools (root pools
no less :>) is that there would be several minutes of retries, when
all the sd and lower layers' retries were added up.
Answering your second question, all ZFS pools should be configured
with redundancy from ZFS' point of view.
I am sure this is the right answer, but it is not obvious to me how I
would do this like I do this with UFS file systems using the SAN as
the redundant file backing. Thanks for the feedback.
create 2 luns on your san.
zone them so your host can see them
zpool create poolname mirror vdev1 vdev2
zfs create poolname/fsname
For my ultra20, I have / + /usr + /var and some of /opt mirrored using
svm, and then I have an uber-pool to contain everything else:
$ zdb -C
sink
version=3
name='sink'
state=0
txg=4
pool_guid=6548940762722570489
vdev_tree
type='root'
id=0
guid=6548940762722570489
children[0]
type='mirror'
id=0
guid=5106440632267737007
metaslab_array=13
metaslab_shift=31
ashift=9
asize=307077840896
children[0]
type='disk'
id=0
guid=9432259574297221550
path='/dev/dsk/c1d0s3'
devid='id1,[EMAIL PROTECTED]/d'
whole_disk=0
children[1]
type='disk'
id=1
guid=7176220706626775710
path='/dev/dsk/c2d0s3'
devid='id1,[EMAIL PROTECTED]/d'
whole_disk=0
whch I created by first slicing the disks, then running
# zpool create sink mirror c1d0s3 c2d0s3
Under the "sink" zpool, I have a few zfs:
$ zfs list
NAME USED AVAIL REFER MOUNTPOINT
sink 119G 161G 24.5K /sink
sink/hole 574M 161G 574M /opt/csw
sink/home 2.22G 161G 2.22G /export/home
sink/scratch 96.1G 161G 96.1G /scratch
sink/src 6.66G 161G 6.66G /opt/gate
sink/swim 555M 161G 555M /opt/local
sink/zones 12.9G 161G 27.5K /zones
sink/zones/kitchensink 10.6G 161G 10.6G /zones/kitchensink
which I created with
# zfs create sink/hole
# zfs create sink/home
etc etc.
James C. McPherson
--
Solaris kernel software engineer, system admin and troubleshooter
http://www.jmcp.homeunix.com/blog
Find me on LinkedIn @ http://www.linkedin.com/in/jamescmcpherson
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