FIFO compaction policy selects only files which have all cells expired.
The column family MUST have non-default TTL. One of the use cases for this
policy is when we need to store raw data which will be post-processed later
and discarded completely after quite short period of time. Raw time-series vs.
time-based roll up aggregates and compacted time-series. We collect raw time-series
and store them into CF with FIFO compaction policy, periodically we run task
which creates roll up aggregates and compacts time-series, the original raw data
can be discarded after that.
Fields inherited from class org.apache.hadoop.hbase.regionserver.compactions.CompactionPolicy