[
https://issues.apache.org/jira/browse/CASSANDRA-15141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16876492#comment-16876492
]
Jay Zhuang commented on CASSANDRA-15141:
----------------------------------------
Here is a patch to improve the performance of calculating endpoint replicas.
It's 100x - 1000x faster than the default implementation:
| Branch | uTest | JVM-dTest | dTest |
| [15141-trunk|https://github.com/Instagram/cassandra/tree/15141-trunk] |
[circle #51|https://circleci.com/gh/Instagram/cassandra/51] | [circle
#50|https://circleci.com/gh/Instagram/cassandra/50] | [circle
#53|https://circleci.com/gh/Instagram/cassandra/53] |
> RemoveNode takes long time and blocks gossip stage
> --------------------------------------------------
>
> 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.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org
For additional commands, e-mail: commits-h...@cassandra.apache.org
