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https://issues.apache.org/jira/browse/JAMES-3573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benoit Tellier closed JAMES-3573.
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Resolution: Fixed
> Add a Cassandra configuration option for datacenter
> ---------------------------------------------------
>
> Key: JAMES-3573
> URL: https://issues.apache.org/jira/browse/JAMES-3573
> Project: James Server
> Issue Type: Improvement
> Components: cassandra
> Reporter: Benoit Tellier
> Priority: Major
> Fix For: 3.7.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> h3. Why
> The data-center is not specified in the James Cassandra driver. As such,
> James do not have an understanding of its locality and might involve
> Cassandra nodes of the other DCs in its operations despite using
> LOCAL_SERIAL, LOCAL_QUORUM...
> h3. How
> add the `local.dc` configuration option in `cassandra.properties` file
> {code:java}
> local.dc=DC1
> {code}
> Should result in the cluster builder doing:
> {code:java}
> Cluster.Builder clusterBuilder = Cluster.builder()
> .withoutJMXReporting()
> .withLoadBalancingPolicy(new
> TokenAwarePolicy(DCAwareRoundRobinPolicy.builder()
> .withLocalDc("DC1")
> .build()));
> {code}
> Note that this is the default load-balancing policy:
> {code:java}
> new TokenAwarePolicy(DCAwareRoundRobinPolicy.builder().build())
> {code}
> h3. References
> See
> https://stackoverflow.com/questions/48519462/usage-of-the-local-quorum-consistency-level-in-datastax-driver
> for instance
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