[rabbitmq-discuss] High-availability: Unsynchronised mirrors questions (3.0.2)
Simon MacMullen
simon at rabbitmq.com
Wed Mar 13 11:14:17 GMT 2013
Yes, with some limitations. See http://next.rabbitmq.com/ha.html
Cheers, Simon
On 13/03/13 11:11, Vladislav Pernin wrote:
> Hi,
>
> I'd like to hear more about these planned improvements ?
> Will it be something like joining the cluster and filling in the queue
> with existing messages to have a fully synchronised state ?
>
> Vladislav
>
> 2013/3/13 Simon MacMullen <simon at rabbitmq.com <mailto:simon at rabbitmq.com>>
>
> See http://www.rabbitmq.com/ha.__html#unsynchronised-slaves
> <http://www.rabbitmq.com/ha.html#unsynchronised-slaves>
>
> And note that we will be making improvements in this area in 3.1.
>
> Cheers, Simon
>
>
> On 13/03/13 10:53, Alexis Van Der Merwe wrote:
>
> Hi there,
>
> I'm testing out the HA features using server version 3.0.2 and
> it seems
> to fulfill my requirements.
> There's one thing I don't really understand, and I was hoping
> someone
> would be able to enlighten me.
>
> I have a two (2) node HA cluster, for convenience, let's call them
> /NODE-MASTER/ and /NODE-SLAVE/.
>
> 1. I publish 100k messages to NODE-MASTER, and they are
> replicated to
> /NODE-SLAVE/.
> 2. I take down /NODE-MASTER/ using *rabbitmqctl*.
> 3. NODE-SLAVE is promoted to master and retains the messages it
> previously received.
> 4. Bring /NODE-MASTER/ back up and into the cluster
>
>
> This all works as I expect it to, but after the former master node
> rejoins the cluster,
> I see a message in the web-management console saying that one of the
> nodes is unsynchronised (see screenshot).
>
> Why does this occur, and more importantly, what does it mean in this
> scenario?
>
> Regards,
>
> A
>
> <https://lh6.__googleusercontent.com/-__bFcdaf1LZHU/UUBaaQiwPqI/__AAAAAAAAA-0/JxUjiQWpbDc/s1600/__unsynchronised_mirrors.jpg
> <https://lh6.googleusercontent.com/-bFcdaf1LZHU/UUBaaQiwPqI/AAAAAAAAA-0/JxUjiQWpbDc/s1600/unsynchronised_mirrors.jpg>>
>
>
>
>
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> --
> Simon MacMullen
> RabbitMQ, VMware
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--
Simon MacMullen
RabbitMQ, VMware
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