[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)

["Enis Soztutar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-10052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14168521#comment-14168521 ] 

Enis Soztutar commented on HBASE-10052:
---------------------------------------

Unscheduling from branch-1 for now. Feel free to bring back if there is a patch.


> 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
>            Priority: Minor
>             Fix For: 2.0.0
>
>
> 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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