On Fri, Apr 12, 2013 at 4:14 PM, Craig Sanders <cas@taz.net.au> wrote:
i'd agree with this - CEPH is cool.
in fact, i'd also be inclined to use CEPH as the object store with Openstack instead of Swift - ceph's object store does everything that swift does and also offers the distributed block storage layer on top of that - thus avoiding the need for QCOW2 over NFS (yuk!) or a dedicated netapp server or similar for shared VM images.
Actually Swift can do one thing ceph doesn't swift has really awesome geographic replication built in. http://swiftstack.com/blog/2012/09/16/globally-distributed-openstack-swift-c... http://www.mirantis.com/blog/configuring-multi-region-cluster-openstack-swif... Once that gets added to ceph there is very little use for anything but ceph. (Ceph can also act as a back end store for hadoop)