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

["Colin Patrick McCabe (JIRA)" <ji...@apache.org>]

Colin Patrick McCabe created HBASE-10052:
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             Summary: 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


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 {{DataOutputStream#setDropBehind}}.



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