Re: [Nbd] NBD using SDP

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

Yeah, my fingers hit `ctrl-s` instead of `ctrl-v`... :-)

You'll need to make sure that you either have the openfabrics stack
installed or the kernel has been built with Infiniband support
enabled.  

cheers
john   

On Tue, 2007-10-16 at 16:19 +0200, Wouter Verhelst wrote:
> On Tue, Oct 16, 2007 at 07:38:59AM -0500, John Leidel wrote:
> > The patches essentially allow one to take advantage of the transport
> > layer RDMA capabilities of the fabric medium using the OpenFabrics
> > software stack.  The most common transport fabric is Infiniband,
> > although Chelsio 10GbE cards also support the protocol.
> > 
> > You'll probably see the most benefit when using fairly large block sizes
> > as the transfer mechanisms in OpenFabrics tend to favor large messages
> > [although, they are building in better support for smaller messages].
> > I'm not sure what to expect if you mount swap in this manner.  It would
> > either give you quite a performance boost, or completely hose up the
> > swap.      
> > 
> > A more complete discussion on SDP is here: 
> > http://en.wikipedia.org/wiki/Sockets_Direct_Protocol
> > 
> > and here
> 
> I think you forgot to paste in a link here.
> 
> Anyway, yeah, that sounds like something useful; I'll probably integrate
> this into nbd, provided I can (at the very least) get it to compile and
> make it a runtime configurable option or so.
>