[mpich-discuss] Can't receive messages

Jeff Hammond jeff.science at gmail.com
Thu Jan 2 07:32:46 CST 2014

What if the proxy app is just a shell script that parses the magic number file?


Sent from my iPhone

> On Jan 1, 2014, at 6:49 PM, Pavan Balaji <balaji at mcs.anl.gov> wrote:
> On Jan 1, 2014, at 6:30 PM, Jeff Hammond <jeff.science at gmail.com> wrote:
>>> The only thing you can do is have mpiexec ssh to each node, and get the information needed.  This is (1) not scalable, and (2) not viable unless we start distributing a program that gets the datatype information for all datatypes we care about and compare the bits inside mpiexec.
>> Can't you do this in a tree rather than root-to-all?
> No.  To do a tree, I need some proxy application that I need to run on the intermediate nodes, that will do the second-level ssh. This proxy application will need to be heterogeneous-safe if it needs to communicate with mpiexec.
>  — Pavan
> --
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji
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