"stop compaction is about temporarily interrupting all ongoing compaction
of a given type.
That will also be needed for 'nodetool stop <compaction_type>'.
The test was about starting scylla, stressing it, stopping compaction using
the API and checking that scylla was able to recover.
Scylla will print a message as follow for each compaction that was stopped:
ERROR [shard 0] compaction_manager - compaction failed: read exception:
std::runtime_error (Compaction for keyspace1/standard1 was deliberately stopped.)
INFO [shard 0] compaction_manager - compaction task handler sleeping for 20 seconds"
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