Tyler Hobbs created CASSANDRA-11179:
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Summary: Parallel cleanup can lead to disk space exhaustion
Key: CASSANDRA-11179
URL: https://issues.apache.org/jira/browse/CASSANDRA-11179
Project: Cassandra
Issue Type: Bug
Components: Compaction, Tools
Reporter: Tyler Hobbs
In CASSANDRA-5366, we made cleanup (among other things) run in parallel across
multiple sstables. There have been reports on IRC of this leading to disk
space exhaustion, because multiple sstables are (almost entirely) rewritten at
the same time. This seems particularly problematic because cleanup is
frequently run after a cluster is expanded due to low disk space.
I'm not really familiar with how we perform free disk space checks now, but it
sounds like we can make some improvements here. It would be good to reduce the
concurrency of cleanup operations if there isn't enough free disk space to
support this.
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