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Posted to dev@ambari.apache.org by "Aravindan Vijayan (JIRA)" <ji...@apache.org> on 2015/12/01 19:35:11 UTC
[jira] [Created] (AMBARI-14140) Test and Adopt FIFO compaction
policy for AMS high load tables
Aravindan Vijayan created AMBARI-14140:
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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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