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I was wondering if anyone has developped or knows of a simple task to allow
2 PC's to monitor each other - perhaps using the serial or parallel ports to
allow a standby to take over from an active machine should the active
machine fail. I have had a look at the QNX HAM software and it does not
appear to support redundancy.

On Wed, 26 Apr 2006 16:10:01 -0400, Michael Nunan wrote:


I was wondering if anyone has developped or knows of a simple task to
allow
2 PC's to monitor each other - perhaps using the serial or parallel
ports to
allow a standby to take over from an active machine should the active
machine fail. I have had a look at the QNX HAM software and it does not
appear to support redundancy.


We have implemented our own solution to this, a combination of UDP or
serial heartbeat-ing between the machines combined with IP address
adoption
(clustering). We weren't able to find anything off-the-shelf that met our
requirements.

We started with some ideas from the 'heartbeat' program which is used in
Linux HA solutions (see http://linux-ha.org/HeartbeatProgram) but you will
find it is not trivial to port this to QNX.

If you are interested we could talk about making our solution available to
you under some kind of commercial teams.

Rob Rutherford
Ruzz Technology