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From "Alex Liu (Jira)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-15141) Faster token ownership calculation for NetworkTopologyStrategy
Date Fri, 22 Nov 2019 16:29:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-15141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16980297#comment-16980297
] 

Alex Liu edited comment on CASSANDRA-15141 at 11/22/19 4:28 PM:
----------------------------------------------------------------

How does  {{[getAddressReplicas()|https://github.com/apache/cassandra/blob/7df67eff2d66dba4bed2b4f6aeabf05144d9b057/src/java/org/apache/cassandra/service/StorageService.java#L3002] block
heartbeat propagation?}}


was (Author: alexliu68):
How does  {{[getAddressReplicas()|https://github.com/apache/cassandra/blob/7df67eff2d66dba4bed2b4f6aeabf05144d9b057/src/java/org/apache/cassandra/service/StorageService.java#L3002] blocks
heartbeat propagation?}}

> 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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