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https://issues.apache.org/jira/browse/CASSANDRA-12608?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei Deng updated CASSANDRA-12608:
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Labels: lcs observation (was: )
> For LCS compaction sessions, have compactionstats to print out src_level and
> dst_level
> --------------------------------------------------------------------------------------
>
> Key: CASSANDRA-12608
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12608
> Project: Cassandra
> Issue Type: Improvement
> Components: Compaction
> Reporter: Wei Deng
> Priority: Minor
> Labels: lcs, observation
>
> It seems that we use reportCompactionTable() function in
> o.a.c.tools.nodetool.CompactionStats to print out the information for each
> compaction session, which already has access to compactionID according to
> [this
> line|https://github.com/apache/cassandra/blob/9895837557137b96bb12d371e42138770539e82d/src/java/org/apache/cassandra/tools/nodetool/CompactionStats.java#L92].
> This means it should not be hard to get the source level and destination
> level from a LCS compaction ID. If we could add two additional columns
> "src_level" and "dst_level" whenever we detect a particular compaction
> session is using LeveledCompactionStrategy, it would be very helpful in
> understanding the progress LCS is making and what all of the concurrent
> compaction sessions are doing. For none-LCS compaction sessions, these two
> columns can just print empty strings.
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