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From "James Strachan" <james.strac...@gmail.com>
Subject Re: [Un]reliable:// network of AMQ brokers with Lingo
Date Mon, 12 Jun 2006 13:17:04 GMT
On 6/12/06, Thomas Swindells <tswindells@ndsuk.com> wrote:
> James.Strachan wrote:
> >
> > On 6/8/06, Christopher G. Stach II <cgs@ldsys.net> wrote:
> >> James Strachan wrote:
> >> > Note that the client side reliable:// in AMQ3 and failover:// in AMQ4
> >> > (BTW it was renamed in 4 to make it explicit what it does - failover
> >> > to a new connection, thats all) -purely does client side reconnection
> >> > - it does not implement HA clustering where messages are replicated to
> >> > multiple brokers in case one fails and you loose the disk; only
> >> > Master/Slave does that - which is a broker-side configuration.
> >> >
> >> > Though store/forward and Master/Slave depends on the client using
> >> failover.
> >>
> >> What happens when a client hiccups and does failover to the slave, but
> >> all of the other clients are still using the master?
> >
> > The slave doesn't accept new connections  until the master fails.
> >
> What happens if the slave and a client hiccups and thinks the master has
> failed?

If the slave and the clients think the master is down then failover to
the slave will occur.

Note that both the clients and the slave must think the master is
down. e.g. if the clients think the master is down but the slave can
still see the master, then the clients will not be able to connect to
the slave (as it doesn't allow connections until the master has failed
over), so they will reconnect to the master again.

-- 

James
-------
http://radio.weblogs.com/0112098/

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