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:
c0t0d0s1 c0t1d0s1 SVM mirror, UFS /
c0t0d0s3 c0t1d0s3 SVM mirror, UFS /var
c0t0d0s4 c0t1d0s4 SVM mirror, UFS /opt
c0t0d0s6 c0t1d0s6 SVM metadb
c0t2d0s1 c0t2d0s1 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,
Robert mailto:[EMAIL PROTECTED]
http://milek.blogspot.com
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