[Linux-cluster] Choose between broadcast and multicast for cman

[Riaan van Niekerk]

Is there any reason or advantage to use multicast over broadcast, which
offsets the complexity of multicast (relative to broadcast), e.g more
control, less traffic, others?

The documentation is not very helpful. The RHCS 4 manual just says "choose
one". The RHCS 3 manual section 3.6.1 says "Multicast heartbeating over a
channel-bonded Ethernet interface provides good fault tolerance and is
recommended for availability." This looks more like a recommendation of
channel-bonding versus standalone interfaces than recommending multicast
over broadcast, since fault tolerance and availability are offered by
channel-bonding, not multicast.


-- 
Riaan van Niekerk
Systems Architect
Obsidian Red Hat Consulting

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