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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10052) use HDFS advisory caching to avoid caching HFiles that are not going to be read again (because they are being compacted)
Date Wed, 27 Nov 2013 22:04:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13834210#comment-13834210
] 

Andrew Purtell commented on HBASE-10052:
----------------------------------------

Cool [~cmccabe], would you like to provide a patch for this, or I can take it ... ?

> use HDFS advisory caching to avoid caching HFiles that are not going to be read again
(because they are being compacted)
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-10052
>                 URL: https://issues.apache.org/jira/browse/HBASE-10052
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Colin Patrick McCabe
>             Fix For: 0.98.0
>
>
> HBase can benefit from doing dropbehind during compaction since compacted files are not
read again.  HDFS advisory caching, introduced in HDFS-4817, can help here.  The right API
here is {{DataInputStream#setDropBehind}}.



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