RE: RDMA over TCP (Was Re: VI (Was: Avoiding deadlock in iSCSI))

[Stephen Byan <Stephen.Byan@quantum.com>]

Douglas Otis [mailto:dotis@sanlight.net] wrote:

> As SCSI does not benefit from VI
> with zero copy already possible with frame alignment, the 
> area where there
> could be commonality has been missed with the choice of CRC.  

I believe the point in factoring out the RDMA mechanism from iSCSI is to
make the same hardware assists available to other application protocols. The
benefit this provides to iSCSI is that it enables iSCSI adapters to be
marketed as general-purpose application protocol accelerators, not just as
iSCSI accelerators. This is not a technical benefit, but rather an economic
and marketing benefit. 

Doug, do you disagree that having a generic RDMA facility would be an
economic and marketing benefit?

Regards,
-Steve

Steve Byan
<stephen.byan@quantum.com>
Design Engineer
MS 1-3/E23
333 South Street
Shrewsbury, MA 01545
(508)770-3414
fax: (508)770-2604