[ofw] WinOF interoperable with Linux OpenIB

[Smith, Stan]

Hello,
  As Sean pointed out, the IB connection manager is the issue; different
CM connection protocols between Linux and Windows. The DAT/DAPL sides,
if they could get connected, would have no problems exchanging messages.
Once upon a time, in a land, far, far away....an early MPI/DAPL kludge
was setup such that a TCP/IP socket connection was used to exchange IB
Queue Pair (QP) information then used to link remote QPs; not
recommended or supported in Windows.
About 9 months ago Voltaire was slated to start work on a connected mode
IPoIB for Windows (64K MTU); no telemetry since then.
So sadly 2K MTU IPoIB is about the best there is at this juncture.
 
stan.

________________________________

From: ofw-bounces at lists.openfabrics.org
[mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Greg Rodgers
Sent: Wednesday, October 10, 2007 6:42 PM
To: ofw at lists.openfabrics.org
Subject: [ofw] WinOF interoperable with Linux OpenIB




We would like to link a Windows machine to a Linux machine with
InfiniBand and use DAPL.  IPoIB is not fast enough.   On the Linux side
we have OFED 1.2 with RHEL 5.1.    I am new to OpenIB but I hear that
Windows would have a problem with RDMA cm.   Can anyone give me some
high level advice before I get the hardware?   The Windows machine will
be Windows 2003 R2 with Mellonox SDR card. 

Thank you. 

Greg Rodgers
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