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From "Vladimir Rodionov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-14468) Compaction improvements: FIFO compaction policy
Date Wed, 23 Sep 2015 04:11:05 GMT
Vladimir Rodionov created HBASE-14468:
-----------------------------------------

             Summary: Compaction improvements: FIFO compaction policy
                 Key: HBASE-14468
                 URL: https://issues.apache.org/jira/browse/HBASE-14468
             Project: HBase
          Issue Type: Improvement
            Reporter: Vladimir Rodionov
            Assignee: Vladimir Rodionov
             Fix For: 2.0.0


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 rollup 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 rollup aggregates and compacts time-series, the original raw data can be discarded
after that.



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