[dat-discussions] [openib-general] [RFC] DAT2.0immediatedataproposal

[Arlin Davis]

Michael Krause wrote:

> RDMA Write with Immediate is part of the IB Extended Transport 
> Header.  It is a fixed-sized quantity and not one subject to change, 
> i.e. increasing its size.
>
> Your argument above reinforces that the particular application need is 
> IB-specific and thus should not be part of a general API but a 
> transport-specific API.   If the application will only operate 
> optimally using immediate data, then it is only suitable for an IB 
> fabric.  This reinforces the need for a transport-specific API.

I agree. I will move the IB immediate data service back into the 
extension interface and update the OpenIB uDAPL provider patch.

>
> Those applications that simply want to enable completion notification 
> when a RDMA Write has occurred can use a general purpose API that is 
> interconnect independent and whose code is predicated upon a RDMA 
> Write - Send set of operations.  This will enable application 
> portability across all interconnect types.

I will defer this to Arkady to draft.

-arlin