Jason White <jason@jasonjgw.net> wrote:
I think it's supposed to perform all of the replication transparently across the disks that you provide, based on what I've read, so you shouldn't need RAID.
Furthermore, the CRUSH map feature looks very interesting: http://ceph.com/docs/master/rados/operations/crush-map/ so you can make the logical structure of the map correspond to the organization of your physical infrastructure and then ensure that replicas are automatically created to avoid potential hardware failure scenarios.
Yes I'm liking this more and more. Each of my servers have two network interfaces, and two disks. I can bond the network interfaces together (probably LACP), or put them on separate subnets (they are now for iscsi multipath) and use CRUSH map to distribute the data in such a way that the networks see similar load. In fact this probably happens automatically with uniform distribution across nodes. Some testing is in order I think. James