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Posted to commits@cassandra.apache.org by "Brandon Williams (Jira)" <ji...@apache.org> on 2021/07/20 14:28:00 UTC
[jira] [Updated] (CASSANDRA-10490) DTCS historic compaction,
possibly with major compaction
[ https://issues.apache.org/jira/browse/CASSANDRA-10490?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Brandon Williams updated CASSANDRA-10490:
-----------------------------------------
Resolution: Won't Fix
Status: Resolved (was: Open)
Closing since DTCS is deprecated.
> DTCS historic compaction, possibly with major compaction
> --------------------------------------------------------
>
> Key: CASSANDRA-10490
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10490
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Compaction
> Reporter: Jonathan Shook
> Priority: Normal
> Labels: compaction, dtcs, triage
> Fix For: 2.2.x, 3.11.x
>
>
> Presently, it's simply painful to run a major compaction with DTCS. It doesn't really serve a useful purpose. Instead, a DTCS major compaction should allow for a DTCS-style compaction to go back before max_sstable_age_days. We can call this a historic compaction, for lack of a better term.
> Such a compaction should not take precedence over normal compaction work, but should be considered a background task. By default there should be a cap on the number of these tasks running. It would be nice to have a separate "max_historic_compaction_tasks" and possibly a "max_historic_compaction_throughput" in the compaction settings to allow for separate throttles on this. I would set these at 1 and 20% of the usual compaction throughput if they aren't set explicitly.
> It may also be desirable to allow historic compaction to run apart from running a major compaction, and to simply disable major compaction altogether for DTCS.
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