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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-6409) gossip performance improvement at node startup
Date Wed, 27 Nov 2013 17:39:49 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6409?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-6409:
--------------------------------------

    Tester: Quentin Conner

> gossip performance improvement at node startup
> ----------------------------------------------
>
>                 Key: CASSANDRA-6409
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6409
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Quentin Conner
>            Assignee: Jonathan Ellis
>             Fix For: 1.2.13, 2.0.4
>
>         Attachments: 2013-11-26_17-40-08.png, endpointToTokenMapCPU.txt
>
>
> With large clusters (> 500 nodes) and num_tokens > 255 we sometimes see a node
have trouble starting up.  CPU usage for one thread is pegged.
> We see this concurrent with Gossip flaps on the node trying to learn the ring topology.
 Other nodes on the ring, that are already at steady state do not seem to suffer.  It is the
node joining the large ring that has trouble.



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