[rabbitmq-discuss] Can someone please confirm the clustered durable queue behavior?

Eugene Vasilchenko evasilchenko at groupcommerce.com
Sat Dec 29 03:21:12 GMT 2012


Thank you so much for the explanation. So if I understand it correctly,
once the original master is back online as a slave, its old messages will
get consumed, meaning it's possible that we will get some old, previously
consumed messages again. (Since we already consumed them earlier from the
new master?)

If this is the case, is there any way to be able to tell if this message is
stale? My only guess would be through the delivery tag?

On Fri, Dec 28, 2012 at 9:22 PM, Matthias Radestock
<matthias at rabbitmq.com>wrote:

> On 29/12/12 02:17, Matthias Radestock wrote:
>> On 28/12/12 18:17, Eugene Vasilchenko wrote:
>>> Let's say I have a cluster of 3 machines running rabbit. All of my
>>> queues are durable
>> ...and mirrored, presumably...
> Btw, note that durability is a red herring here; queue synchronisation
> behaviour when nodes (re)join the cluster is the same regardless of whether
> the queue is durable. Durability only comes into play when the last mirror
> of a queue is stopped and subsequently restarted.
> Matthias.

Front End Engineer  |  Group Commerce Inc.
646-549-8891 |  evasilchenko at groupcommerce.com
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