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From Mark Thomas <ma...@apache.org>
Subject Re: StaticMembers within Multiple Clusters
Date Thu, 17 Jan 2019 20:36:20 GMT
On 17/01/2019 15:28, Tim K wrote:

> With the DeltaManager, instead of it notifying all nodes when sessions get
> established, is there a way for it to only share that single node's
> sessions during a shutdown event of that particular node?  For example,
> node 1 of 8 has 5 sessions on it.  When node 1 is shut down, only then will
> it replicate those 5 sessions to the other 7 nodes...  This would reduce
> the all-to-all traffic that would be occurring constantly but would put
> more weight on a shutdown event... Also, another wrinkle, the shutdown port
> is disabled in server.xml for security reasons.

None of the managers can be configured to replicate only on shutdown.

The BackupManager is closer to the behaviour you describe. Note it is a
common misconception that in the BackupManager a single node acts as a
backup for all the other nodes. This is incorrect. Backups are
distributed on a round-robin basis between all other nodes.

The shutdown port being disabled should be a non-issue. As long as you
kill -15 rather than kill -9 then you'll get a clean shutdown.

Mark

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