Im looking for suggestions about maximizing performance when using an RBD backend (Ceph) over a 10GB Ethernet link. In my testing, I see the read throughput max out at about 100Mbyte/second for just about any block sizes above 4K (below 4K it becomes horribly slow) and write operations are about 40Mbyte/second.
Using librados directly to read from the same backend pool/image yields much higher numbers, so the issue seems to be in the iscsi/bs_rbd backend. Regardless of the data sizes being read, the max thruput I am seeing is about 80% slower than using librados directly. Any suggestions would be much appreciated. thanks, Wyllys -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
