Jonathan Ellis created CASSANDRA-11119:
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Summary: Add bytes-to-compact estimate
Key: CASSANDRA-11119
URL: https://issues.apache.org/jira/browse/CASSANDRA-11119
Project: Cassandra
Issue Type: Bug
Components: Compaction
Reporter: Jonathan Ellis
Fix For: 3.x
Pending tasks is essentially useless at letting operators know how far behind
compaction is. For STCS, because compaction tasks can vary in size by several
orders of magnitude, so "4 more tasks" is a very wide range. For LCS, I think
the problem is that we only look at first-order work (how much larger is level
X than it "should" be?) and not cascading effects, particularly in L0 (if we
push this into L1, how much does that push into L2 etc?).
I propose adding an estimate of bytes-to-compact (and deprecating estimated
tasks).
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