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https://issues.apache.org/jira/browse/CASSANDRA-16079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17186638#comment-17186638
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Michael Semb Wever edited comment on CASSANDRA-16079 at 8/28/20, 3:56 PM:
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The ccm used in each dtest run is from `origin/master`. So pre-bootstrapping
the parameterised ccm clusters (to create the template/cache), would have to be
done per overall dtest run. Caching templates for past ccm SHAs doesn't hold a
lot of value.
It would be _nice_ to introduce the improvement inside dtest+ccm codebases, so
it's consistently used by all (rather than docker/vm snapshots).
was (Author: michaelsembwever):
The ccm used in each dtest run is from `origin/master`. So pre-bootstrapping
the parameterised ccm clusters so to template/cache, has to be done per
overall dtest run. Caching templates for past ccm SHAs doesn't hold a lot of
value.
It would be _nice_ to introduce the improvement inside dtest+ccm codebases, so
it's consistently used by all (rather than docker/vm snapshots).
> Improve dtest runtime
> ---------------------
>
> Key: CASSANDRA-16079
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16079
> Project: Cassandra
> Issue Type: Improvement
> Components: CI
> Reporter: Adam Holmberg
> Priority: Normal
> Fix For: 4.0-beta
>
>
> A recent ticket, CASSANDRA-13701, changed the way dtests run, resulting in a
> [30% increase in run
> time|https://www.mail-archive.com/dev@cassandra.apache.org/msg15606.html].
> While that change was accepted, we wanted to spin out a ticket to optimize
> dtests in an attempt to gain back some of that runtime.
> At this time we don't have concrete improvements in mind, so the first order
> of this ticket will be to analyze the state of things currently, and try to
> ascertain some valuable optimizations. Once the problems are understood, we
> will break down subtasks to divide the work.
> Some areas to consider:
> * cluster reuse
> * C* startup optimizations
> * Tests that should be ported to in-JVM dtest or even unit tests
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