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Posted to commits@cassandra.apache.org by "Jay Zhuang (Jira)" <ji...@apache.org> on 2019/08/26 00:16:00 UTC
[jira] [Updated] (CASSANDRA-15141) Faster token ownership
calculation for NetworkTopologyStrategy
[ https://issues.apache.org/jira/browse/CASSANDRA-15141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jay Zhuang updated CASSANDRA-15141:
-----------------------------------
Summary: Faster token ownership calculation for NetworkTopologyStrategy (was: RemoveNode takes long time and blocks gossip stage)
> 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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