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https://issues.apache.org/jira/browse/CASSANDRA-6976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14199399#comment-14199399
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Jonathan Ellis commented on CASSANDRA-6976:
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Right, so this is basically just an issue for {{SELECT * FROM foo LIMIT 10}}
when there's a lot of vnodes involved. Which isn't a query I can see anyone
doing programatically, and from cqlsh 100ms is no big deal.
I'm fine with closing as wontfix unless you want to rewrite it lazily for fun.
> 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: Core
> Reporter: Benedict
> Assignee: Ariel Weisberg
> Labels: performance
> Fix For: 2.1.2
>
> 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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