[
https://issues.apache.org/jira/browse/HBASE-10689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13926010#comment-13926010
]
Colin Patrick McCabe commented on HBASE-10689:
----------------------------------------------
No problem. I agree it can get a bit confusing. It would be nice to see some
numbers from tweaking readahead on HBase when you guys get a chance. I guess
the gain will depend partly on how much caching HBase is doing. If HBase is
caching that extra 4 MB that it read, then it's not such a loss. If it's
throwing that away, then making readahead shorter may be a big gain.
> Explore advisory caching for MR over snapshot scans
> ---------------------------------------------------
>
> Key: HBASE-10689
> URL: https://issues.apache.org/jira/browse/HBASE-10689
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce, Performance
> Reporter: Nick Dimiduk
>
> Per
> [comment|https://issues.apache.org/jira/browse/HBASE-10660?focusedCommentId=13921730&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13921730]
> on HBASE-10660, explore using the new HDFS advisory caching feature
> introduced in HDFS-4817 for TableSnapshotInputFormat.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
