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From Clebert Suconic <>
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

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

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 <> 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]
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Clebert Suconic

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