On 2012-10-29 08:29, John Levine wrote:
I'm trying to set up a freebsd image under vmware, but I need more
disk
space than the vmware hosts offer. So the guy who runs the hosting
place
suggests getting a 1U disk server and using iSCSI over gigabit
Ethernet
so I can build zfs volumes from the iSCSI disks.
Poking around, the reports say that FreeBSD is a pretty good iSCSI
server in such forms as freenas, but a lousy iSCSI client, with the
first problem being that that kludges are required to get iSCSI
volumes mounted early enough in the boot process for ZFS to find
them.
Is this still the case in FreeBSD 9?
I'd rather not use NFS, since the remote disks have mysql databases,
and mysql and NFS are not friends.
An alternative is to mount the iSCSI under vmware, so zfs sees them
as
normal disks. Anyone tried that?
TIA,
John
I don't have an answer for you at the moment, but I can tell you that I
just started a new server build this morning with the intent of using it
as an iSCSI client and running ZFS on the drive. In my case however its
going to be a file server that doesn't have very much heavy I/O, with
the intention of using compression on the ZFS file set. In my case a
script ran after start up to mount the drive would work if it fails. I
will let you know what I find out, server is in the middle of a
buildworld to get it updated to the p4 release.
Yes you can mount as a drive through VMware and use ZFS just fine, I
have done a lot of recent tests using ZFS as the boot volume under
VMware. This new server will be my first production server to use what I
have learned from those tests, as its system drive mounted through
VMware (ESX 4.1) and is booting from ZFS. Once the install of the
buildworld is complete I will add a 150G ZFS data set on our HP Lefthand
Networks SAN, run some tests and let you know the outcome of them.
--
Thanks,
Dean E. Weimer
http://www.dweimer.net/
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