Re: CEPH (was ZFS vs RAID (was gpt and grub))

James Harper <james.harper@bendigoit.com.au> wrote:

For a production CEPH installation, I think I would still use RAID1 underneath and then deploy CEPH on top, as it lowers the risk of a node-down situation, at the expense of requiring additional disks.

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. A quick Web search did not reveal a recent overview of Ceph, but the original paper is here: http://www.ssrc.ucsc.edu/Papers/weil-osdi06.pdf and it's now on my reading list.