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TimeWindowCompactionStrategy is an alternative to
DateTieredCompactionStrategy, developed by Jeff Jirsa. It is ships with Cassandra 3.0.7 and later, (where
DateTieredCompactionStrategy has been officially deprecated). For Cassandra versions < 3.0.7, it is possible to install time-window compaction out-of-tree.
Wikimedia maintains a Github branch of the repository, with the Maven
pom.xml patched to deploy the jar to archiva.wikimedia.org.