On Thu, Feb 16, 2012 at 3:09 PM, Tom Ellis <tom.el...@canonical.com> wrote: > nova-volume service > * Current weakness in the HA setup, unless you are willing to use iscsi > tgtd with DRBD. I believe this would still have some problems when > failing over with the initiators that are logged in.
Nope, this is well understood and supported. It all amounts to getting the Pacemaker configuration right, but DRBD-backed, tgt-based iSCSI targets are perfectly capable of failover that is fully transparent to initiators. That being said, of course nova-volume with RBD (RADOS block device) would be another approach that may provide better reliability (more replicas, where DRBD is limited to 2 -- 4 with some trickery), better scaleout (seamless expansion and contraction of the storage space), and better self-healing capabilities (automatic rebalancing if individual replicas fail). Hope this is useful. Cheers, Florian -- Need help with High Availability? http://www.hastexo.com/now _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
