01-24-2014
The backbone of the highavailability is the nodes in a cluster checking each other so you should look into heartbeats. They are usually implemented by sharing a disk space, like a concurrent accessable VG, which is rather small and have the nodes write in there some bits and by the freshness of it the nodes can decide who is still up and alive.
Additionally there is heartbeating via network interfaces. Some even use or used serial interfaces etc.
This is an important part of HACMP/PowerHA and other Cluster Technologies.
Have a look here:
Heartbeating in HACMP - AIX 6.1 Information Center
This User Gave Thanks to zaxxon For This Post:
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LEARN ABOUT DEBIAN
sfood-cluster
SFOOD-CLUSTER(1) General Commands Manual SFOOD-CLUSTER(1)
NAME
sfood-cluster - read snakefood dependencies from stdin and cluster according to filenames
SYNOPSIS
sfood-cluster [options] directories...
DESCRIPTION
You need to call this script with the names of directories to cluster together, for relative filenames.
OPTIONS
-h, --help
show the help message and exit
-f FROM_FILE, --from-file=FROM_FILE
Read cluster list from the given filename.
SEE ALSO
sfood(1), sfood-checker(1), sfood-copy(1), sfood-flatten(1), sfood-graph(1), sfood-imports(1).
AUTHOR
sfood-cluster was written by Martin Blais <blais@furius.ca> and it's part of snakefood suite.
This manual page was written by Sandro Tosi <morph@debian.org>, for the Debian project (and may be used by others).
January 2, 2009 SFOOD-CLUSTER(1)