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

[Vladislav Pernin]

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>

> 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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