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Posted to dev@ambari.apache.org by "Aravindan Vijayan (JIRA)" <ji...@apache.org> on 2015/12/03 22:48:11 UTC
[jira] [Updated] (AMBARI-14140) Test and Adopt FIFO compaction
policy for AMS high load tables
[ https://issues.apache.org/jira/browse/AMBARI-14140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aravindan Vijayan updated AMBARI-14140:
---------------------------------------
Attachment: AMBARI-14140.patch
> 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: 2.2.0
>
> Attachments: AMBARI-14140.patch
>
>
> 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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