[ofw] WinOF interoperable with Linux OpenIB

[Yaron Segev]

Stan,

>About 9 months ago Voltaire was slated to start work on a connected
mode IPoIB for Windows

Actually this task has been left unassigned.

 

See attached, we committed only to the yellow ones.

While the green light has been dedicated to MLNX, the light blue has
been left open... 

 

Yaron

 

___________________________________________________________

Yaron Segev |   +972-9-9717650 (o)   |   +972-54-4996631 (m)

Vice President, Software Development

Voltaire - The Grid Backbone 

www.voltaire.com <http://www.voltaire.com/>
______________________________________________

 

________________________________

From: ofw-bounces at lists.openfabrics.org
[mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Smith, Stan
Sent: Thursday, October 11, 2007 5:00 PM
To: Greg Rodgers; ofw at lists.openfabrics.org
Subject: RE: [ofw] WinOF interoperable with Linux OpenIB

 

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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