[MPICH2-dev] mpd client library and protocol?

[Greg Watson]

Rajeev,

Many thanks for your reply. Can you suggest the best approach if I  
want to write a C program to control mpd? At a minimum, I'd like to  
be able to spawn/terminate an MPI job using a C program. Is PMI what  
I'd use to do this?

Any documentation you could provide would be appreciated.

Thanks,

Greg

On May 16, 2006, at 7:56 PM, Rajeev Thakur wrote:

> Greg,
>
>> I assume that mpdlib.py is a client library that other applications
>> (i.e. other than mpiexec) could potentially use to communicate with
>> and/or control mpd.
>>
>> 1. Is there any API documentation?
>
> The API is the Process Manager Interface (PMI), which is the interface
> MPICH2 uses for interacting with process managers. There is some
> documentation for it, which I could send you if you like (it may  
> not be 100%
> up to date).
>
>> 2. Is there a C version of the client library?
>
> The PMI library is in C. It is implemented in src/pmi/simple/ 
> simple_pmi.c.
>
>> 3. Is the mpd protocol documented anywhere?
>
> Not currently, but the plan is to :-).
>
>> 4. Is the protocol used by mpd the same as that used by smpd?
>
> No, they are different.
>
> Rajeev
>