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Subject: Re: [OMPI users] importing to MPI data already in memory from another process
From: George Bosilca (bosilca_at_[hidden])
Date: 2014-06-27 10:19:13


The One-Sided Communications from the Chapter 11 of the MPI standard?
For processes on the same node you might want to look at
MPI_WIN_ALLOCATE_SHARED.

  George.

On Fri, Jun 27, 2014 at 9:53 AM, Brock Palen <brockp_at_[hidden]> wrote:
> Is there a way to import/map memory from a process (data acquisition) such that an MPI program could 'take' or see that memory?
>
> We have a need to do data acquisition at the rate of .7TB/s and need todo some shuffles/computation on these data, some of the nodes are directly connected to the device, and some will do processing.
>
> Here is the proposed flow:
>
> * Data collector nodes runs process collecting data from device
> * Those nodes somehow pass the data to an MPI job running on these nodes and a number of other nodes (cpu need for filterting is greater than what the 16 data nodes can provide).
>
> One thought is to have the data collector processes be threads inside the MPI job running across all nodes, but was curious is there is a way to pass data still in memory (to much to hit disk) to the running MPI filter job.
>
> Thanks!
>
> Brock Palen
> www.umich.edu/~brockp
> CAEN Advanced Computing
> XSEDE Campus Champion
> brockp_at_[hidden]
> (734)936-1985
>
>
>
>
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