[rabbitmq-discuss] High-availability: Unsynchronised mirrors questions (3.0.2)

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>>
>
>
>
>
>         _________________________________________________
>         rabbitmq-discuss mailing list
>         rabbitmq-discuss at lists.__rabbitmq.com
>         <mailto:rabbitmq-discuss at lists.rabbitmq.com>
>         https://lists.rabbitmq.com/__cgi-bin/mailman/listinfo/__rabbitmq-discuss
>         <https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss>
>
>
>
>     --
>     Simon MacMullen
>     RabbitMQ, VMware
>     _________________________________________________
>     rabbitmq-discuss mailing list
>     rabbitmq-discuss at lists.__rabbitmq.com
>     <mailto:rabbitmq-discuss at lists.rabbitmq.com>
>     https://lists.rabbitmq.com/__cgi-bin/mailman/listinfo/__rabbitmq-discuss
>     <https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss>
>
>
>
>
> _______________________________________________
> rabbitmq-discuss mailing list
> rabbitmq-discuss at lists.rabbitmq.com
> https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
>

-- 
Simon MacMullen
RabbitMQ, VMware