Re: XioMessenger (RDMA) Status Update

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On Tue, May 13, 2014 at 6:30 PM, Matt W. Benjamin <matt@xxxxxxxxxxxx> wrote:
> Hi Greg,
>
> 1. there isn't support for for mark_down() yet (!), but we're working
> on it.  I've had good discussions with the Accelio team regarding exposing
> explicit channel and flow control interfaces, which round out that topic
> as we were exploring it.
>
> 2. the big changes in this push are major cleanups and bug fixes, plus
> much wider integration with the user space code.  my #1 action item from
> our last convo was to first extend Xio coverage everywhere, and in particular,
> add support for intra-cluster messaging over Xio.
>
> 2.1 on the cleanups and bugs front, starting with biggest, I finished support
> for peer identification, using a small api change to Accelio (it's now on the
> official Accelio for_next branch).  a Connection refcnt underrun is fixed.  then
> I added a mechanism to bypass Accelio for intra-server messages, using a special
> singleton connection.  I cleaned up, but didn't deepen, feature support, as a
> temporary measure.  There's lot's of cleanup and various fixes in ceph_osd, too.
>
> 2.2 then, I did first cut integration with the MDS, and while at it, the Client
> module as well.  I've only started verifying, but so far it looks like the
> intra-cluster messaging paths work, and a client workload may work--more fixes
> likely forthcoming.
>
> I have a plan to get at least the starter policy interfaces like mark_down and
> mark_down_all shorty.

Cool. Let me know when those features are ready for a semantics review
or there's something else we need to talk about. :)
-Greg
Software Engineer #42 @ http://inktank.com | http://ceph.com
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