[mpich-discuss] RDMA Support

[Svancara, Randall]

I am well aware of the differences in the installations as I have installed them.  I am just wondering if there is support for RDMA in MPICH2.  I know OpenMPI and MVAPICH2 have support for RDMA.  I do not use MPICH2, it is new to me and I was just curious if it would be a feasible option on our HPC.  Looks like it is feasible, but you have to use slower TCP over IB, which is not optimal for our environment. 

Thanks for the two cents!

Randall Svancara
High Performance Computing Systems Administrator
Washington State University
509-335-3039


-----Original Message-----
From: mpich-discuss-bounces at mcs.anl.gov [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Darius Buntinas
Sent: Friday, January 06, 2012 8:37 AM
To: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] RDMA Support

OK.  As Gus suggested earlier, you're probably using MVAPICH.  MVAPICH does use RDMA over infiniband.

-d

On Jan 6, 2012, at 10:31 AM, Svancara, Randall wrote:

> Hi,
> 
> We are using Mellanox QDR Infiniband.
> 
> Thanks,
> 
> Randall Svancara
> High Performance Computing Systems Administrator Washington State 
> University
> 509-335-3039
> 
> 
> -----Original Message-----
> From: mpich-discuss-bounces at mcs.anl.gov 
> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Darius 
> Buntinas
> Sent: Friday, January 06, 2012 8:17 AM
> To: mpich-discuss at mcs.anl.gov
> Subject: Re: [mpich-discuss] RDMA Support
> 
> MPICH2 does _support_ RDMA, but it depends on whether the network offer it and how MPICH2 was ported to use that network.
> 
> What network are you using?
> 
> -d
> 
> On Jan 5, 2012, at 4:03 PM, Svancara, Randall wrote:
> 
>> I am trying to figure out what kind of support MPICH2 has for RDMA.  Is there anyone who can provide any documentation on this.
>> 
>> Thanks,
>> 
>> Randall Svancara
>> High Performance Computing Systems Administrator Washington State 
>> University
>> 509-335-3039
>> 
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