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https://issues.apache.org/jira/browse/CASSANDRA-15141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17380748#comment-17380748
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Brandon Williams commented on CASSANDRA-15141:
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If there is still interest in this it needs a minor rebase. There's likely
some path from the Gossiper calling getAddressReplicas() that I can't think of
off the top of my head, so this seems reasonable.
> Faster token ownership calculation for NetworkTopologyStrategy
> --------------------------------------------------------------
>
> Key: CASSANDRA-15141
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15141
> Project: Cassandra
> Issue Type: Improvement
> Components: Cluster/Gossip, Cluster/Membership
> Reporter: Jay Zhuang
> Assignee: Jay Zhuang
> Priority: Normal
>
> This function
> [{{getAddressReplicas()}}|https://github.com/apache/cassandra/blob/7df67eff2d66dba4bed2b4f6aeabf05144d9b057/src/java/org/apache/cassandra/service/StorageService.java#L3002]
> during removenode and decommission is slow for large vnode cluster with
> NetworkTopologyStrategy. As it needs to build whole replications map for
> every token range.
> In one of our cluster (> 1k nodes), it takes about 20 seconds for each
> NetworkTopologyStrategy keyspace, so the total time to process a removenode
> message takes at least 80 seconds (20 * 4: 3 system keyspaces, 1 user
> keyspace). It blocks the heartbeat propagation and causes false down node.
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