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Adam Holmberg edited comment on CASSANDRA-16079 at 8/27/20, 7:51 PM:
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One idea that was relayed (with attribution to [~mck]] and [~blambov]):
{quote}remove the bootstrapping from all dtests that don't need it. e.g. to
bootstrap parameterized ccm clusters and save them as templates, and then have
each dtest to copy a ccm template and start it up. that deduces sequential
bootstrap time with parallel startup time, on basically every dtest.{quote}
was (Author: aholmber):
One idea that was relayed (with attribution to [~mck]] and [~blambov]):
{quote}remove the bootstrapping from all dtests that don't need it. e.g. to
bootstrap parameterized ccm clusters and save them as templates, and then have
each dtest to copy a ccm template and start it up. that deduces sequential
bootstrap time with parallel startup time, on basically every dtest.{quote}
> 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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