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Posted to hdfs-issues@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2016/10/03 16:47:20 UTC
[jira] [Updated] (HDFS-10940) Reduce performance penalty of block
caching when not used
[ https://issues.apache.org/jira/browse/HDFS-10940?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kihwal Lee updated HDFS-10940:
------------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Fix Version/s: 3.0.0-alpha2
2.8.0
Status: Resolved (was: Patch Available)
Committed this to trunk, branch-2 and branch-2.8.
> Reduce performance penalty of block caching when not used
> ---------------------------------------------------------
>
> Key: HDFS-10940
> URL: https://issues.apache.org/jira/browse/HDFS-10940
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.7
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Fix For: 2.8.0, 3.0.0-alpha2
>
> Attachments: HDFS-10940.patch
>
>
> For every block location generated, the CacheManager will create a junk object for a hash lookup of cached locations. If there are no cached blocks, none of this is required.
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