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https://issues.apache.org/jira/browse/CASSANDRA-13701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17179534#comment-17179534
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Michael Semb Wever commented on CASSANDRA-13701:
------------------------------------------------
CI run
[here|https://ci-cassandra.apache.org/blue/organizations/jenkins/Cassandra-devbranch/detail/Cassandra-devbranch/247/pipeline/258/].
[~adejanovski], could you check if any of [these
failures|https://ci-cassandra.apache.org/job/Cassandra-devbranch/247/testReport/]
are related?
Based on just the one run (though there was no pipelines running in
ci-cassandra.a.o at the time), the total runtime for devbranch tests (trunk
based) has gone from ~16hrs to ~27hrs. But, due to parallelisation, the
pipeline run times have only increased from ~2hrs to ~2:20 hours. This is not
ideal but I think it's worth pushing fixing/further-improving dtest performance
to out-of-scope and a separate ticket.
> Lower default num_tokens
> ------------------------
>
> Key: CASSANDRA-13701
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13701
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
> Reporter: Chris Lohfink
> Assignee: Alexander Dejanovski
> Priority: Low
> Fix For: 4.0-alpha
>
>
> For reasons highlighted in CASSANDRA-7032, the high number of vnodes is not
> necessary. It is very expensive for operations processes and scanning. Its
> come up a lot and its pretty standard and known now to always reduce the
> num_tokens within the community. We should just lower the defaults.
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