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From martk <123mar...@web.de>
Subject Re: Artemis HA cluster with replication
Date Tue, 16 May 2017 14:51:47 GMT
How do I have to set up the e.g. 4 nodes? One live (master) and 3 backup
(slave)? And would this solve the problem of two live broker (the steps to
reproduce are in first post)?


clebertsuconic wrote
> There isn't much we can do with a single backup pair.
> 
> On this case you will need 3 pairs...
> 
> or maybe you could embed zookeeper somehow. We had thought about using
> zookeeper (which will require more than 3 nodes to elect quorum
> anyways).
> 
> 
> We can only guarantee that a single backup/live pair is not isolated
> on the network. Now if you want to break the system, sure you can do
> it.
> 
> if you had more than 3 nodes the quorum would decide to set the node down.
> 
> On Tue, May 16, 2017 at 9:50 AM, martk <123martin@web.de> wrote:
>> No, I would like to simulate a busy/overloaded server (e.g. the broker
>> process is not working correctly). The network is all the time available
>> and
>> the server is also answering a ping.
>>
>>
>> jbertram wrote
>>> I realize you're attempting to simulate a network outage, but from what
>>> I
>>> understand using SIGSTOP isn't necessarily an accurate way to do it. It
>>> was
>>> explained to me awhile back by a colleague who had done quite a bit of
>>> work
>>> in this area that SIGSTOP works differently at the socket level from
>>> something like pulling a network cable out of a NIC or even killing the
>>> process. See more here [1]. In mention this because you might want to
>>> develop an alternate testing mechanism to more accurately simulate a
>>> network
>>> outage use-case.
>>>
>>>
>>> Justin
>>>
>>> [1]
>>> https://unix.stackexchange.com/questions/202104/what-happens-to-requests-to-a-service-that-is-stopped-with-sigstop
>>
>> Quoted from:
>> http://activemq.2283324.n4.nabble.com/Artemis-HA-cluster-with-replication-tp4725734p4726194.html
>>
>>
>>
>>
>> --
>> View this message in context:
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>> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
> 
> 
> 
> -- 
> Clebert Suconic





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