Wido, Thanks for the comment, a follow-up if I might (below)? Wido den Hollander wrote:
I build some small Ceph cluster with sometimes just 3 nodes. It works, but you have to keep in mind that when one node in a 4 node cluster fails you will loose 25% of the capacity. This will lead to a heavy recovery within the Ceph cluster which will but a lot of pressure on that Gbit links and the CPUs and memory of the nodes. With RBD you might want to consider adding an SSD for the journaling of the OSDs, that will give you a pretty nice performance boost.
Would not journalling alone, say on a separate hard disk volume, help with recovery? Thanks, Miles -- In theory, there is no difference between theory and practice. In practice, there is. .... Yogi Berra -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
