Hi Lionel,
I am trying to setup Sequoia over two PostgreSQL backends to provide a
HA default datasource to a JBoss cluster.
I want two Sequoia controllers so as to avoid a single point of failure.
I only have 2 backends, which I want to setup in a RAIDb-1 fashion.
Is it OK if they are each on a separate controller?
Yes it is OK. Don't forget to setup the <Distribution> element so that
controllers are properly synchronized through group communications.
Will the following configuration for the RequestManager still be alright?
<RequestManager>
<RequestScheduler>
<RAIDb-1Scheduler level="passThrough"/>
</RequestScheduler>
<LoadBalancer>
<RAIDb-1>
<WaitForCompletion policy="first"/>
<RAIDb-1-LeastPendingRequestsFirst/>
</RAIDb-1>
</LoadBalancer>
[...]
</RequestManager>
As you have a single backend per controller, I would use
<WaitForCompletion policy="all"> since semantically is does not change
anything but it will take a simpler and faster code path in the
controller logic.
Thanks for your interest in Sequoia,
Emmanuel
--
Emmanuel Cecchet
Chief Scientific Officer, Continuent
Blog: http://emanux.blogspot.com/
Open source: http://www.continuent.org
Corporate: http://www.continuent.com
Skype: emmanuel_cecchet
Cell: +33 687 342 685
_______________________________________________
Sequoia mailing list
Sequoia@lists.forge.continuent.org
https://forge.continuent.org/mailman/listinfo/sequoia
