Install mpd service

This is used to configure a mpd ring running under the root account that will be used by users. This assumes you have 4 CPUs per each node and you may need to adjust this according to your cluster.

1. Create mpd service file similar to the following
   /etc/rc.d/init.d/mpd

   !/bin/sh
   #
   # Start or stop system wide mpd daemon
   
   # Source the aved functions
   . /etc/profile.d/aved.sh
   
   case "$1" in
   start)
           # This assumes only nodes and not the master are listed in the mpd.hosts file
           # because the master is not typically listed as a worker node
           c=`wc -l $MPDIR/etc/mpd.hosts | awk '{print $1}'`
           # Add one to include the master
           ((c += 1))
           if [ ! -e '/tmp/mpd2.console_root' ]; then
               mpdboot --ncpus=4 --totalnum=$c --file="$MPDIR/etc/mpd.hosts --mpd=$MPDIR/bin/mpd.py"
            else
               echo "restarting mpd"
               mpdallexit
               mpdboot --ncpus=4 --totalnum=$c --file="$MPDIR/etc/mpd.hosts --mpd=$MPDIR/bin/mpd.py"
           fi
           mpdtrace
           ;;
   
   stop)
           if [ -e '/tmp/mpd2.console_root' ]; then
               mpdallexit
               #remove tmp file in case mpdallexit cmd fails
               if [ -e '/tmp/mpd2.console_root' ]; then
                   rm /tmp/mpd2.console_root
               fi
               echo "mpd daemon stopped"
           else
               echo "mpd daemon already stopped"
           fi
           ;;
   
   status)
           if [ -e '/tmp/mpd2.console_root' ]; then
               mpdtrace -l
           else
               echo "mpd daemon not running"
           fi
           ;;
   
       *)  echo "usage: $0 {start|stop|status}"
           ;;
   "/etc/rc.d/init.d/mpd" 53L, 1411C

2. Then push to the other nodes

   cpush /etc/rc.d/init.d/mpd /etc/rc.d/init.d/mpd
   

3. Start the mpd service

   service mpd start
   

   You should see the nodes all come up, something like (not necessarily in this order):

   beowulffish
   node1
   node4
   node3
   node2
   node5
   node8
   node6
   node7