On 6/28/18, 12:11 AM, "kefu chai" <tchaikov@xxxxxxxxx> wrote:
> What is the state of the RDMA code in the Ceph Luminous and later releases?
in Ceph, the RDMA support has been constantly worked on. xio messenger
support was added 4 years ago, but i don't think it's maintained
anymore. and async messenger was IB protocol support. i think that's
what you wanted to try out. recently, we added the iWARP support to
the async messenger, see https://github.com/ceph/ceph/pull/20297. that
change also brought better connection management by using rdma-cm to
Ceph. and i believe to get RDMA support we should have
https://github.com/ceph/ceph/pull/14681, which is still pending on
review.
>
> When will it be production ready?
the RDMA support in Ceph is completely driven by our community. and we
don't have the hardware (NIC) for testing RoCEv2/iWARP, not to mention
IB. so i can hardly tell from the maintainer's perspective.
> [1]: https://community.mellanox.com/docs/DOC-2721
--
Regards
Kefu Chai
Hi Kefu,
Thanks for the detailed explanation. Looks like, we will have to wait for few
releases to get a supported and production ready RDMA support in ceph.
Thanks,
Nitin
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