Daryn Sharp created HDFS-10940:
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Summary: 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
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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