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Adam Holmberg commented on CASSANDRA-16079:
-------------------------------------------
Everything looks pretty good to me. Thanks Mick for exploring this through
multiple iterations!
I put a handful of comments on the ccm changes. Nothing too crazy -- most are
"take 'em or leave 'em"
Tentative +1 from me on both ccm and dtest changes.
Have dtests been run on any of the previous supported C* branches? I tried
kicking a few off and the dtests all show "blocked" in CircleCI. I've not tried
to run Circle on earlier branches before, so I wasn't sure what to expect.
> 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
> Assignee: Michael Semb Wever
> Priority: Normal
> Fix For: 4.0-beta
>
> Attachments: Screenshot 2020-09-19 at 12.32.21.png
>
>
> 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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