[rabbitmq-discuss] Clustering failure

Dan Wise DWise at capulaglobal.com
Tue Dec 13 12:02:10 GMT 2011

Many thanks for this Simon. I will try with two disk nodes and test simultaneous failure of both.


-----Original Message-----
From: rabbitmq-discuss-bounces at lists.rabbitmq.com [mailto:rabbitmq-discuss-bounces at lists.rabbitmq.com] On Behalf Of Simon MacMullen
Sent: 13 December 2011 10:39
To: rabbitmq-discuss at lists.rabbitmq.com
Subject: Re: [rabbitmq-discuss] Clustering failure

On 13/12/11 09:24, Dan Wise wrote:
> Can both nodes be disk nodes (I always assumed not)?

Yes, they can. You can have as many disc nodes as you like. However...

 > My question is, is there a way of changing this configuration so that it  > does not matter which order the nodes come back up after a total outage?

...it can still matter which order the nodes come back. If you shut down in an orderly way and A goes down after B, A will need to come back up again first (since things maybe have happened in the cluster while B was down).

I'm not sure what happens in the event of several nodes simultaneously losing power though.

> We cannot rely on
> the fact that the disk node will be usable after such a failure.

Absolutely. You need more than one then :)

Cheers, Simon

Simon MacMullen
RabbitMQ, VMware
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