MPICH2 RDMA

[David Ashton]

Devesh,

We are no longer developing the rdma channel in MPICH2 because we have
integrated rdma into the shm and Infiniband channels directly and because
the rdma abstraction in the rdma channel is sub-optimal.  But anyway, in the
rdma channel there are transport mechanisms to implement rdma.  We started
with two versions of shared memory, shm and shmtp, and did some preliminary
work on using the shmem library to implement rdma.  You choose one transport
mechanism at configure time.  You don't get multi-method capability.  In
other words, you could build the rdma channel to use shared memory or
Infiniband but not both.

-David Ashton

-----Original Message-----
From: Rajeev Thakur [mailto:thakur at mcs.anl.gov] 
Sent: Wednesday, May 18, 2005 2:23 PM
To: 'David Ashton'
Subject: FW: MPICH2 RDMA

 

-----Original Message-----
From: owner-mpich-discuss at mcs.anl.gov
[mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of devesh sharma
[devesh28 at gmail.com]
Sent: Wednesday, May 18, 2005 4:37 AM
To: mpich-discuss at mcs.anl.gov
Subject: MPICH2 RDMA

Please help me on following topic.

In the MPICH2 RDMA channel device implementation what is the
significance of shm, shmem and shmtp implementations?

 Can these Devices be used with some NIC specific implementation to
support RDMA with shared Memory?

If any body tell me then please Do.

Regards 
Devesh