make leveled compaction suck less for insert-heavy workloads
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Key: CASSANDRA-3328
URL: https://issues.apache.org/jira/browse/CASSANDRA-3328
Project: Cassandra
Issue Type: Improvement
Reporter: Jonathan Ellis
Priority: Minor
In insert-heavy workloads, leveled compaction needs to do a lot of "promotion"
from one level to a higher one, where the higher level has no overlapping
sstables. We can optimize a lot of these away by not bothering to rewrite
sstables that are younger than GCGraceSeconds.
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