Andrew Wang created HDFS-4949:
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Summary: Centralized cache management in HDFS
Key: HDFS-4949
URL: https://issues.apache.org/jira/browse/HDFS-4949
Project: Hadoop HDFS
Issue Type: New Feature
Components: datanode, namenode
Affects Versions: 3.0.0, 2.2.0
Reporter: Andrew Wang
HDFS currently has no support for managing or exposing in-memory caches at
datanodes. This makes it harder for higher level application frameworks like
Hive, Pig, and Impala to effectively use cluster memory, because they cannot
explicitly cache important datasets or place their tasks for memory locality.
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