[ewg] Getting started

[Woodruff, Robert J]

Paul wrote, 
> The Verbs API is 'transport agnostic', meaning that an application can use
> the Verbs API regardless of whether the underlying transport is InfiniBand
> over an IB wire, InfiniBand over an Ethernet wire (i.e. RoCE), or RDMA over
> a TCP/IP/Ethernet network (iWARP).

This is true to some degree. There are some things in InfiniBand (like immediate data,
atomics, UD mode) that are not in iWarp,
so if you want to write a verbs application that will run over either transport, you
need to take some care to only use the verbs features that are common to both.