[jira] [Updated] (HBASE-10052) use HDFS advisory caching to avoid caching HFiles that are not going to be read again (because they are being compacted)

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-10052?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell updated HBASE-10052:
-----------------------------------

    Priority: Minor  (was: Major)
    Assignee: Andrew Purtell

I'll take this on as one of the things to do before the 0.98.0 RC. If someone else would like to put up a patch, feel free to reassign though.

> 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
>            Assignee: Andrew Purtell
>            Priority: Minor
>             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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