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From Clebert Suconic <clebert.suco...@gmail.com>
Subject Re: Artemis HA cluster with replication
Date Tue, 16 May 2017 14:25:44 GMT
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: http://activemq.2283324.n4.nabble.com/Artemis-HA-cluster-with-replication-tp4725734p4726197.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.



-- 
Clebert Suconic

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