[Spread-users] Indications from spread
John Lane Schultz
jschultz at spreadconcepts.com
Mon Jul 3 11:31:23 EDT 2006
Dutta Abhijit wrote:
> Does spread posts separate events (state change) for these two scenarios:
> 1. Cable pull out in one of the nodes
> 2. If spread daemon is killed in another node.
> If yes, how we can trap these events.
Yes, Spread does generate events once the timeouts (couple of seconds) detect
the disconnection of the daemon(s). These events will appear as membership view
changes (CAUSED_BY_NETWORK) to surviving members of groups that have clients
connecting through the disconnecting daemon(s).
For this to work you would need to run a daemon on each of the machines you care
about and then have at least one client connect to the system through each
daemon and all SP_join into the same group. Then membership view change events
of CAUSED_BY_NETWORK will correspond to the above listed events. Note, however,
that CAUSED_BY_NETWORK can also represent additive membership changes and can
occur if, for example, you replugged the cable back in (more generally, if the
network partition healed) and the daemons could begin communicating again.
Check out http://www.spread.org/docspread.html for more documentation.
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