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xen-users
Re: [Xen-users] iSCSI target - run in Dom0 or DomU?
On Friday 25 August 2006 14:49, Jason wrote:
> I wonder, instead of drdb, what would happen if you exported both
> storage servers iscsi targets to your xen machines and then used linux
> software raid1 to mount them both and keep them in sync.
>
You'd end up with a management nightmare. Which dom0 would be maintaining the
RAID set? And you'd have to keep an eye on all the RAID configurations for
each virtual machines disk(s) on every dom0. You would also be trying to
write to both storage servers at the same time and that's not possible with
drbd.
Part of the point is to make the Xen servers as simple as possible, and
therefore interchangeable/replaceable, with little extra configuration to
support. Eventually I would expect to use drbd 8.0 on the storage servers,
giving primary/primary access, and use multipath-tools allowing me to
dispense with heartbeat on the storage servers.
Matthew
--
Matthew Wild Tel.: +44 (0)1235 445173
M.Wild@xxxxxxxx URL http://www.ukssdc.ac.uk/
UK Solar System Data Centre and
World Data Centre - Solar-Terrestrial Physics, Chilton
Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX
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