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From "Aravindan Vijayan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-14140) Test and Adopt FIFO compaction policy for AMS high load tables
Date Thu, 03 Dec 2015 21:48:11 GMT

     [ 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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