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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4963) Support in memory PTF partitions
Date Sun, 25 Aug 2013 08:11:52 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13749567#comment-13749567
] 

Hudson commented on HIVE-4963:
------------------------------

FAILURE: Integrated in Hive-trunk-hadoop2-ptest #69 (See [https://builds.apache.org/job/Hive-trunk-hadoop2-ptest/69/])
HIVE-4963 : Support in memory PTF partitions (Harish Butani via Ashutosh Chauhan) (hashutosh:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1517236)
* /hive/trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/PTFOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/PTFPartition.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/PTFPersistence.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/PTFRowContainer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/RowContainer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/PTFTranslator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/PTFDesc.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/PTFDeserializer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFLeadLag.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/NPath.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/TableFunctionEvaluator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/TableFunctionResolver.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/WindowingTableFunction.java
* /hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/persistence/TestPTFRowContainer.java
* /hive/trunk/ql/src/test/queries/clientpositive/ptf_reuse_memstore.q
* /hive/trunk/ql/src/test/queries/clientpositive/windowing_adjust_rowcontainer_sz.q
* /hive/trunk/ql/src/test/results/clientpositive/ptf_reuse_memstore.q.out
* /hive/trunk/ql/src/test/results/clientpositive/windowing_adjust_rowcontainer_sz.q.out

                
> Support in memory PTF partitions
> --------------------------------
>
>                 Key: HIVE-4963
>                 URL: https://issues.apache.org/jira/browse/HIVE-4963
>             Project: Hive
>          Issue Type: New Feature
>          Components: PTF-Windowing
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>             Fix For: 0.12.0
>
>         Attachments: HIVE-4963.D11955.1.patch, HIVE-4963.D12279.1.patch, HIVE-4963.D12279.2.patch,
HIVE-4963.D12279.3.patch, PTFRowContainer.patch
>
>
> PTF partitions apply the defensive mode of assuming that partitions will not fit in memory.
Because of this there is a significant deserialization overhead when accessing elements. 
> Allow the user to specify that there is enough memory to hold partitions through a 'hive.ptf.partition.fits.in.mem'
option.  
> Savings depends on partition size and in case of windowing the number of UDAFs and the
window ranges. For eg for the following (admittedly extreme) case the PTFOperator exec times
went from 39 secs to 8 secs.
>  
> {noformat}
> select t, s, i, b, f, d,
> min(t) over(partition by 1 rows between unbounded preceding and current row), 
> min(s) over(partition by 1 rows between unbounded preceding and current row), 
> min(i) over(partition by 1 rows between unbounded preceding and current row), 
> min(b) over(partition by 1 rows between unbounded preceding and current row) 
> from over10k
> {noformat}

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