On Dec 15, 2009, at 11:04 PM, Frank Cusack wrote:
I'm considering setting up a poor man's cluster. The hardware I'd
like to use for some critical services is especially attractive for
price/space/performance reasons, however it only has a single power
supply. I'm using S10 U8 and can't migrate to OpenSolaris.
It's fine if a server dies (ie, power supply failure) and I have
to manually get the service running on the other server. But what's
not ok is to lose data from the last transaction on the "primary"
server. For this reason I'm reluctant to do a zfs send | zfs recv
setup (besides the bad vibes I get from such a plebian method anyway).
AVS can also be used. This one option on many of the ZFS appliances.
I was thinking that rather than what I'd normally do which is mirror
two data drives locally, I could have one drive local and use one
drive from the partner server shared via iSCSI. Comments?
Seems reasonable.
If that's feasible and sane, then on the one hand it seems attractive
to use a zfs backing store, but I'd have a zfs filesystem on top of
the zfs backing store, which doesn't seem helpful and I'm guessing
would reduce the total space available, so I'd then have to not use
the whole local disk. So I think I would want to use a raw backing
store, yes?
I would, KISS.
Performance is not a concern.
If no one is throwing red flags yet, then to extend the idea further
maybe I would move the redundant server offsite (I will have metro
ethernet connectivity) and do iSCSI over the WAN and get DR for free.
This is not DR. It is a metro cluster. DR solutions include protection
against temporal failures.
-- richard
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
