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https://issues.apache.org/jira/browse/CASSANDRA-6976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ariel Weisberg updated CASSANDRA-6976:
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Attachment: GetRestrictedRanges.java
jmh_output_murmur3.txt
With the random partitioner and the nodes and vnodes properly mapped to 256
tokens per endpoint.
{quote}{{
[java] Benchmark (nodes) Mode
Samples Score Error Units
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkGlobal 1 avgt
15 16.656 ± 0.821 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkGlobal 10 avgt
15 117.900 ± 7.569 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkGlobal 50 avgt
15 584.864 ± 39.682 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkGlobal 100 avgt
15 1246.623 ± 90.073 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkGlobal 500 avgt
15 11324.498 ± 915.911 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkGlobal 1000 avgt
15 26093.448 ± 1704.904 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkGlobal 2000 avgt
15 61366.412 ± 3471.103 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkRange 1 avgt
15 16.271 ± 0.829 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkRange 10 avgt
15 108.126 ± 5.609 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkRange 50 avgt
15 531.494 ± 21.751 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkRange 100 avgt
15 986.310 ± 53.092 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkRange 500 avgt
15 10127.756 ± 388.324 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkRange 1000 avgt
15 24782.748 ± 2220.330 us/op
[java] o.a.c.t.m.GetRestrictedRanges.benchmarkRange 2000 avgt
15 54076.290 ± 952.472 us/op
}}{quote}
> 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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