Hey all...I'm looking to set up a high availably xen "cluster" so that if my iSCSI storage goes down, my domU's will remain up. I've been looking around on the net and it appears this is a pretty common thing to do but I have one question that I haven't seen an answer to. It looks like I can accomplish the high availably in one of two ways. I can use DRBD on my two boxes as shown here http://www.gridvm.org/drbd-lvm-gnbd-and-xen-for-free-and-reliable-san.html and I should be able to take down a storage box and my iSCSI domU's will never know any difference. An alternate approach (as I see it) is that instead of DRBD I should be able to carve out two iSCSI targets (one on each storage machine) and then in my domU make those two targets (say sda1 and sdb1) a raid-1 and accomplish the same thing as DRBD but use the Linux md stuff instead? Is there a reason that this isn't done? From my lack of findings I'd say yes but I haven't actually tried this in a real setting yet. I was just hoping somebody could steer me in the right direction (and away from this approach if it's just silly). My *guess* is that DRBD was written to do a network raid-1 and thus has optimizations to do just that vs a Linux "disk" raid-1 using md. Thanks for any pointers or insights to this. I'd really appreciate any websites or writeups that would compare the two or just some cook book examples. Thanks, Chris -- Fedora-xen mailing list Fedora-xen@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-xen
