Hello David,
Friday, June 2, 2006, 4:03:45 AM, you wrote:
DJO - Original Message -
DJO From: Robert Milkowski [EMAIL PROTECTED]
DJO Date: Thursday, June 1, 2006 1:17 pm
DJO Subject: Re[2]: [zfs-discuss] question about ZFS performance for
webserving/java
Hello David,
The system itself won't take too much space.
You can create one large slice form the rest of the disks and the same
slices on the rest of the disks. Then you can create one large pool
from 8 such slices. Remaining space on the rest of the disks could be
use for swap for example, or other smaller pool.
DJO Ok, sorry I'm not up to speed on Solaris/software raid types. So
DJO you're saying create a couple slices on each disk. One set of
DJO slices I'll use to make a raid of some sort (maybe 10) and use
DJO UFS on that (for the initial install - can this be done on
DJO installation??), and then use the rest of the slices on the disks
DJO to do the zfs/raid for everything else?
Exactly. And you can do it during installation.
I do it with jumpstart - server with 6 disks - on first two disks
system is installed on a mirror (SVM+UFS, configured automatically by
jumpstart profile) and one additional slice (rest of the disk). Then I
create zpool on these slices.
So it can look like:
c0t0d0s1c0t1d0s1 SVM mirror, UFS /
c0t0d0s3c0t1d0s3 SVM mirror, UFS /var
c0t0d0s4c0t1d0s4 SVM mirror, UFS /opt
c0t0d0s6c0t1d0s6 SVM metadb
c0t2d0s1c0t2d0s1 SVM mirror, SWAP SWAP/s1 size =
sizeof(/ + /var +
/opt)
zpool create local mirror c0t0d0s0 c0t1d0s0 mirror c0t2d0s0
c0t3d0s0 mirror c0t4d0s0 c0t5d0s0
or any other raid supported by ZFS.
I put SWAP on other disks than / intentionally so disk space isn't
wasted and we have as much space for s0 as possible.
I use s0 slice here to emphasis that it would be good idea to have
s0 slice starts from cylinder 0 (or 1) - which means from the
beginning of the disks as we can expect that ZFS pool will be
mostly used in terms of IOs and not / /var or /opt. In that config
I would eventually resign of creating separate /opt.
Then on such created pool I would put zones (each in its own zfs
filesystem under common hierarchy like local/zones) and other
filesystems. I would also consider setting atime=off for most of
them.
--
Best regards,
Robertmailto:[EMAIL PROTECTED]
http://milek.blogspot.com
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