[mpich-devel] about MPI hydra process management

unix haha unixhaha at gmail.com
Tue Jun 30 21:35:42 CDT 2015

Thanks, Balaji.

I took a quick look on persist bootstrap. It seems what I want and I will
try it.

one thing puzzles me is what's "persist" means here for hydra. what's means
for hydra_bss_persist in Makefile.mk under hydra/tools/bootstrap/? the bss
is the .bss section in executable file?


On Wed, Jul 1, 2015 at 7:29 AM, Balaji, Pavan <balaji at anl.gov> wrote:

>  Hydra supports a bunch of daemon processes, including ssh.  There is a
> daemon process included with MPICH called "persist", which you could use
> for this purpose, but it's not really maintained.  You could try it.
>    -- Pavan
>   From: unix haha
> Reply-To: "devel at mpich.org"
> Date: Tuesday, June 30, 2015 at 6:18 PM
> To: "devel at mpich.org"
> Subject: [mpich-devel] about MPI hydra process management
>   Hi, all:
>      I'm working on port the MPICH2 3.1.4 to an embedded environment. I
> met some problems for hydra process management, Could anyone help me?
>      1. For the old MPD, before the mpirun, there's a daemon process
> running on all computer nodes. But I don't see what's hydra's daemon
> process in the current MPI document. Could you give me some hints?
>       2. As we run the MPICH2 in a resource constraint environment, the
> SSH or the other linux-based launcher may not be used. Does it exist any
> simple launcher running on the computer nodes before the mpiexec?
>       3. What's my understanding for hydra is: once the Launcher process
> running on all computer nodes, I can use the mpiexec on the control node to
> start the parallel jobs? If so, the problem is: Could I start the Launcher
> process manually if there's no linux-based launcher?
>        Thanks!
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