Marcus Eriksson created CASSANDRA-17272:
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Summary: LeveledCompactionStrategy disk space check improvements
Key: CASSANDRA-17272
URL: https://issues.apache.org/jira/browse/CASSANDRA-17272
Project: Cassandra
Issue Type: Bug
Reporter: Marcus Eriksson
Assignee: Marcus Eriksson
We currently allow reducing scope (removing sstables from the compaction) when
starting STCS-in-L0 with LCS if the compaction is too large for the available
disk space. We can do the same for L0 -> L1 compactions - but we can only
remove L0 sstables to avoid causing overlap in L1.
Also, in 3.0, when starting an LCS compaction we try to [get a writeable
location|https://github.com/apache/cassandra/blob/b1a8a56c563b85ab9a34d3bbf9c16278dd441157/src/java/org/apache/cassandra/db/compaction/writers/CompactionAwareWriter.java#L128]
where the full result of the compaction will fit - here we should only get a
directory where the first sstable fits, otherwise the compaction might fail
even though there is enough space in total among the data directories
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