[mpich-discuss] Hydra SIGTSTP (Ctrl+Z) handling

[Yauheni Zelenko]

Hi!

SSH information:

OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003

However same problem exists for rsh.

As far as I know (but I may be mistaken) Hydra communicates with proxies (which launch actual application processes) via sockets. I think it (at least theoretically) possible to catch signal in Hydra and send related information via socket. After receiving proxy will relay signals to application processes. In this case signal handling will be independent of actual launcher.

Eugene.
________________________________________
From: Pavan Balaji [balaji at mcs.anl.gov]
Sent: Monday, November 29, 2010 8:01 PM
To: mpich-discuss at mcs.anl.gov
Cc: Yauheni Zelenko
Subject: Re: [mpich-discuss] Hydra SIGTSTP (Ctrl+Z) handling

On 11/29/2010 08:41 PM, Yauheni Zelenko wrote:
> I tried
> http://www.mcs.anl.gov/research/projects/mpich2/downloads/tarballs/nightly/hydra/hydra-r7517.tar.gz
> and it behaive in same way as 1.3.1.

I wonder if the difference is because of the SSH version difference.

% ssh -V
OpenSSH_5.3p1 Debian-3ubuntu4, OpenSSL 0.9.8k 25 Mar 2009

Also, I don't think we can guarantee this for other launchers. Each
launcher has its own way of handling SIGTSTP.

  -- Pavan

--
Pavan Balaji
http://www.mcs.anl.gov/~balaji