[MPICH] how to start up mpd conveniently

[Galton, Simon]

Martin:

Excellent!  That works faster than using lsof -- good one!

Simon 

-----Original Message-----
From: Martin Kleinschmidt [mailto:mk at theochem.uni-duesseldorf.de] 
Sent: September 27, 2006 4:35 AM
To: mpich-discuss at mcs.anl.gov
Cc: Galton, Simon
Subject: Re: [MPICH] how to start up mpd conveniently

Hi Simon,

On Di, 26 Sep 2006, Galton, Simon wrote:

>I worked out a process to allow nodes to join an existing ring in our 
>Linux cluster with dual-cpu cluster nodes:

thanks, helps a lot!


>#!/bin/sh
>headnode=node1
>echo -n $"Joining mpd ring hosted by $headnode: "
>port=`ssh $headnode lsof | grep python2 | grep TCP | grep \* | cut -d: 
>-f2 | cut -d' ' -f1`

this pipe brought up more than 1 line:

[root at node2 root]# rsh node1 /usr/sbin/lsof | grep python2 | grep TCP | grep
\*
python2.3   857      mk    4u  IPv4   12933799                  TCP *:60191
(LISTEN)
python2.3   857      mk    6u  IPv4   12933815                  TCP *:60194
(LISTEN)
python2.3   857      mk   13u  IPv4   12933823                  TCP *:60199
(LISTEN)
python2.3  1176      mk    4u  IPv4   12936272                  TCP *:60314
(LISTEN)
python2.3  1176      mk    6u  IPv4   12936288                  TCP *:60317
(LISTEN)
python2.3  1176      mk   13u  IPv4   12936296                  TCP *:60322
(LISTEN)
python2.3  1183      mk    4u  IPv4   12936419                  TCP *:60328
(LISTEN)
python2.3  1183      mk    6u  IPv4   12936435                  TCP *:60331
(LISTEN)
python2.3  1183      mk   13u  IPv4   12936443                  TCP *:60336
(LISTEN)
python2.3  1188      mk    3u  IPv4   12936469                  TCP *:60341
(LISTEN)
python2.3  1191      mk    4u  IPv4   12936548                  TCP *:60342
(LISTEN)
python2.3  1191      mk    6u  IPv4   12936564                  TCP *:60345
(LISTEN)
python2.3  1191      mk   13u  IPv4   12936572                  TCP *:60350
(LISTEN)
python2.3 32230    root    4u  IPv4   12925107                  TCP *:60149
(LISTEN)

of which I only need the last. Of course one could add "grep root" to the
pipe, but I found that one could also use mpdtrace -l :

port=`rsh $headnode mpdtrace -l | grep "$headnode"_ | awk '{print $1}' | sed
's/'$headnode'_//'`


   ...martin

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