Re: [Nbd] NBD using SDP

[John Leidel <john.leidel@...17...>]

I could also setup a patch tree for the `extended` NBD driver if anyone
has any specific interest.  

On Tue, 2007-10-16 at 08:44 -0400, Mike Snitzer wrote:
> On 10/16/07, Wouter Verhelst <w@...112...> wrote:
> > On Mon, Oct 15, 2007 at 06:21:50PM -0500, John Leidel wrote:
> > > All... apologies for the random post...
> >
> > It's not random ;-)
> >
> > > sometime ago I created a simple patch set for NBD to directly utilize
> > > the RDMA capabilities of Infiniband via the Sockets Direct Protocol.
> >
> > What are the benefits of doing so? I guess I could be pursuaded to
> > accept this into nbd-tools mainline, but I'd really have to know what
> > these protocols do, and how they benefit NBD.
> 
> NBD would be more performant on an Infiniband network because SDP
> allows more efficient use of the IB stack than if relying on IPoIB.
> The cpu overhead should be reduced and overall throughput increased.
> 
> BTW, if you were to accept this wouldn't you just be patching the nbd
> source directly (as is indicated by John's tarball of patches)?
> Adding SDP support implies altering the socket address family to be
> AF_INET_OFFLOAD rather than AF_INIT.  So SDP support could easily be
> made a configure/compile time thing.
> 
> Mike