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[HIVE-7859] Tune zlib compression in ORC to account for the encoding strategy - Hive - [issue]
...Currently ORC Zlib is slow because several compression strategies ZLib uses is already done by ORC in itself (dictionary, RLE, bit-packing).We need to pick between Z_FILTERED, Z_HUFFMAN_ONLY...
http://issues.apache.org/jira/browse/HIVE-7859    Author: Gopal V, 2014-08-23, 00:40
Re: New to TEZ - Hive - [mail # user]
...On 8/11/14, 1:48 PM, karthik Srivasthava wrote:Hi,The correct items to post back would be hive.tez.container.size, hive.tez.java.opts and the value of io.sort.mb.It does look like you have a...
   Author: Gopal V, 2014-08-13, 17:44
[HIVE-7160] Vectorization Udf: GenericUDFConcat for non-string columns input, is not supported - Hive - [issue]
...simple UDF missing vectorization - simple example would be hive> explain select concat( l_orderkey, ' msecs') from lineitem;is not vectorized whilehive>  explain select concat(cas...
http://issues.apache.org/jira/browse/HIVE-7160    Author: Gopal V, 2014-08-11, 18:07
[HIVE-7396] BucketingSortingReduceSinkOptimizer throws NullPointException during ETL - Hive - [issue]
...When a bucketed insert is performed from a partitioned table into a new table2014-07-11 22:11:30,176 ERROR [main]: ql.Driver (SessionState.java:printError(660)) - FAILED: NullPointerExceptio...
http://issues.apache.org/jira/browse/HIVE-7396    Author: Gopal V, 2014-08-10, 02:36
Re: Tuning Triangle Joins on Hive - Hive - [mail # user]
...On 7/31/14, 12:28 PM, Firas Abuzaid wrote:This is an interesting use-case for a JOIN clause.The main overhead is that the JOIN criteria is materializing JOINs onto HDFS.Neither hive indexes,...
   Author: Gopal V, 2014-08-06, 21:03
[HIVE-6320] Row-based ORC reader with PPD turned on dies on BufferUnderFlowException/IndexOutOfBoundsException - Hive - [issue]
...ORC data reader crashes out on a BufferUnderflowException, while trying to read data row-by-row with the predicate push-down enabled on current trunk.Stack trace:Caused by: java.nio.BufferUn...
http://issues.apache.org/jira/browse/HIVE-6320    Author: Gopal V, 2014-08-02, 00:59
[HIVE-6993] Update hive for Tez VertexLocationHint and getAVailableResource API changes - Hive - [issue]
...Tez had two breaking changes in API between 0.4.x -> 0.5.x.context.getTotalAvailableResource().getMemory(); and context.scheduleVertexTasks(List< TaskWithLocationHint>);...
http://issues.apache.org/jira/browse/HIVE-6993    Author: Gopal V, 2014-08-01, 23:12
[HIVE-7156] Group-By operator stat-annotation only uses distinct approx to generate rollups - Hive - [issue]
...The stats annotation for a group-by only annotates the reduce-side row-count with the distinct values.The map-side gets the row-count as the rows output instead of distinct * parallelism, wh...
http://issues.apache.org/jira/browse/HIVE-7156    Author: Gopal V, 2014-08-01, 03:54
[HIVE-6786] Off by one error in ORC PPD - Hive - [issue]
...Turning on ORC PPD makes split computation fail for a 10Tb benchmark.Narrowed down to the following code fragmenthttps://github.com/apache/hive/blob/branch-0.13/ql/src/java/org/apache/hadoop...
http://issues.apache.org/jira/browse/HIVE-6786    Author: Gopal V, 2014-07-31, 19:42
[HIVE-7266] Optimized HashTable with vectorized map-joins results in String columns extending - Hive - [issue]
...The following query returns different results when both vectorized mapjoin and the new optimized hashtable are enabled.hive> set hive.vectorized.execution.enabled=false;hive> select s_...
http://issues.apache.org/jira/browse/HIVE-7266    Author: Gopal V, 2014-07-24, 23:50
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