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Posted to commits@cassandra.apache.org by "Ariel Weisberg (JIRA)" <ji...@apache.org> on 2015/11/23 22:33:11 UTC

[jira] [Updated] (CASSANDRA-6976) Determining replicas to query is very slow with large numbers of nodes or vnodes

     [ https://issues.apache.org/jira/browse/CASSANDRA-6976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ariel Weisberg updated CASSANDRA-6976:
--------------------------------------
    Component/s: Local Write-Read Paths

> Determining replicas to query is very slow with large numbers of nodes or vnodes
> --------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6976
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6976
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Local Write-Read Paths
>            Reporter: Benedict
>            Assignee: Ariel Weisberg
>              Labels: performance
>         Attachments: GetRestrictedRanges.java, jmh_output.txt, jmh_output_murmur3.txt, make_jmh_work.patch
>
>
> As described in CASSANDRA-6906, this can be ~100ms for a relatively small cluster with vnodes, which is longer than it will spend in transit on the network. This should be much faster.



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