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From "Aravindan Vijayan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-14140) Test and Adopt FIFO compaction policy for AMS high load tables
Date Tue, 01 Dec 2015 18:35:11 GMT
Aravindan Vijayan created AMBARI-14140:
------------------------------------------

             Summary: Test and Adopt FIFO compaction policy for AMS high load tables
                 Key: AMBARI-14140
                 URL: https://issues.apache.org/jira/browse/AMBARI-14140
             Project: Ambari
          Issue Type: Bug
          Components: ambari-metrics
            Reporter: Aravindan Vijayan
            Assignee: Aravindan Vijayan
            Priority: Critical
             Fix For: 2.1.3


FIFO compaction policy selects only files which have all cells expired. The column family
MUST have non-default TTL. 

Essentially, FIFO compactor does only one job: collects expired store files.
Because we do not do any real compaction, we do not use CPU and IO (disk and network), we
do not evict hot data from a block cache. The result: improved throughput and latency both
write and read.



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