[ https://forge.continuent.org/jira/browse/SEQUOIA-928?page=all ]
Emmanuel Cecchet resolved SEQUOIA-928:
--------------------------------------
Resolution: Not an issue
Actually you should run the single controller configuration with a Distribution
element in the first place. This way you can add a second controller seamlessly.
Removing the Distribution element is just an optimization that will use a
different code path (incompatible with distributed controller code) to avoid
distributed failover code. It is not possible to dynamically promote a
non-distributed controller to distributed, this is a completely different code
path and behavior.
You should always use the Distribution element even in a single controller
scenario unless you really want to stick with a single controller as a simple
load balancer.
Let me know if the documentation is unclear on that topic.
> Runtime Switch for distribution config
> --------------------------------------
>
> Key: SEQUOIA-928
> URL: https://forge.continuent.org/jira/browse/SEQUOIA-928
> Project: Sequoia
> Type: New Feature
> Components: Core
> Reporter: )ngo Kampe
> Assignee: Emmanuel Cecchet
>
>
> I like to request a feature for changing the <Distribution> config during
> runtime. I suggest a JMX method with
> access to config and automatic config reloading.
> The UseCase:
> A standalone sequoia controller is running in production environment. This
> feature gives the possibility to extend this controller with a second
> controller without downtime. The new controller (and probably new machine)
> will be connected and than on the first controller distribution is to
> activate.
> Today:
> We have to stop the production controller and add the
> <Distribution hederaPropertiesFile="/hedera_appia.properties"
> clientFailoverTimeout="60000">
> <MessageTimeouts/>
> </Distribution>
> element to our vdb.xml and start the controller again.
> For heartbeat experts:
> This could be compared to the cibadmin heartbeat tool, which allows to write,
> update, delete cluster configuration.
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