RE: VI (Was: Avoiding deadlock in iSCSI)

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

Michael Krause [mailto:krause@cup.hp.com] wrote:

> [snip]
> RDMA != VI though VI does use RDMA technologies.  

Agreed. It is an example 

> Prefer to 
> see discussion 
> focused on what RDMA operations are required, what are the error and 
> ordering requirements, etc.  

I think RDMA reads and writes to the initiator are the only operations
needed. As someone here recently argued in the context of TCP/IP
performance, it is the storage clients which most need to offload CPU.

I haven't thought through error and ordering requirements, although the
notion is of course to allow out-of-order processing of RDMA, given some
framing assist from TCP.

> [snip]  
> As such, a general 
> purpose RDMA 
> solution which operates over TCP/IP is the optimal solution 
> to pursue since 
> it will lead to the broadest industry and customer adoption rate.

I think we are in complete agreement.

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