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https://issues.apache.org/jira/browse/HIVE-7313?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopal V updated HIVE-7313:
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Summary: Allow in-memory/ssd session-level temp-tables (was: Allow
session-level temp-tables to be marked as in-memory tables)
> Allow in-memory/ssd session-level temp-tables
> ---------------------------------------------
>
> Key: HIVE-7313
> URL: https://issues.apache.org/jira/browse/HIVE-7313
> Project: Hive
> Issue Type: Improvement
> Components: Tez
> Affects Versions: 0.14.0
> Reporter: Gopal V
> Assignee: Gopal V
> Labels: InMemory, Performance
>
> 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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