Gopal V created HIVE-7313:
-----------------------------

             Summary: Allow session-level temp-tables to be marked as in-memory 
tables
                 Key: HIVE-7313
                 URL: https://issues.apache.org/jira/browse/HIVE-7313
             Project: Hive
          Issue Type: Improvement
          Components: Tez
            Reporter: Gopal V


When the hadoop-2.3C shims are in action, APIs which can pin small tables into 
memory are available.

Any session with an in-memory table can create HDFS in-memory pools with 
default caching semantics and add its files into the cache pool.

Example code to implement the behaviour was prototyped for the Tez Application 
Master, but the AM does not have enough information to determine the cache 
policies.

https://github.com/rajeshbalamohan/hdfs-cache-tool/blob/master/src/main/java/org/apache/hadoop/hdfs/tools/HDFSCache.java#L74



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