[mpich-discuss] RDMA Support

[Svancara, Randall]

That helps a lot.  Thank you all for your helpful advice!!  

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 8:46 AM
To: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] RDMA Support

MVAPICH2 is a derivative of MPICH2, and is the recommend port of MPICH2 to infiniband.  So if you're using MVAPICH2, you are, in effect, already using MPICH2.  I should have said that in the previous email.

I hope that helps.

-d


On Jan 6, 2012, at 10:40 AM, Svancara, Randall wrote:

> 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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