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https://issues.apache.org/jira/browse/HIVE-7313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14585264#comment-14585264
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Damien Carol commented on HIVE-7313:
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[~leftylev] "default" setting means "HIVE doesn't change HDFS storage policy".
I think an association table could be more usefull. Like this:
||Value of hive.exec.temporary.table.storage||Constant used
(HdfsConstants.xxx)||Storage policy|| Description||
|default|<HIVE do nothing>| | |
|mem|MEMORY_STORAGE_POLICY_NAME|Lazy_Persist|for writing blocks with single
replica in memory. The replica is first written in RAM_DISK and then it is
lazily persisted in DISK.|
I will work on that this week.
> 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
> Fix For: 1.1.0
>
> Attachments: HIVE-7313.1.patch, HIVE-7313.2.patch
>
>
> With HDFS storage policies implementation, temporary tables can be written
> with different storage/reliability policies.
> In-session temporary tables can be targetted at both SSD and memory storage
> policies, with fallbacks onto the disk and the associated reliability
> trade-offs.
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