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Re: Hive UDF's vs. "native" Pig UDF's
- [mail # dev]
...Daniel, Not sure you saw this. We will have to document the performanceimplications of hive udfs. Does the wrapping/unwrapping cause significantoverhead to impact performance or ...
, 2015-09-09, 16:28
[PIG-3204] Change script parsing to parse entire script instead of line by line
... Currently there are a lot of NN calls made to determine if there is a schema file for a path in a LOAD statement. When there is a slow NN(caused by whole bunch of other issues), it tak...
, 2015-09-04, 17:25
[PIG-4657] [Pig on Tez] Optimize GroupBy and Distinct key comparison
... While bytes comparator cannot be used for joins till TEZ-2715 is available, they can be used for group by and distinct if they have only one Tez input. If there is more than one input...
, 2015-09-02, 22:49
[PIG-4627] [Pig on Tez] Self join does not handle null values correctly
... Self join does not produce right results in case of null after PIG-4495 which writes multiple inputs into same tez input. Need the https://issues.apache.org/jira/secure/attachment/1262...
, 2015-09-02, 22:48
[PIG-4668] Map side hashmap based de-duplication for DISTINCT operator
... We should do map side de-deduplication using hashmap for DISTINCT similar to pig.exec.mapPartAgg (POPartialAgg) for GROUP BY...
, 2015-09-02, 15:52
Re: Flatten keyword in Pig
- [mail # user]
...You can do FLATTEN + TOTUPLE() UDFOn Fri, Aug 28, 2015 at 11:20 AM, Arvind S wrote: ...
, 2015-09-02, 15:22
Re: About pig support for hbase-126.96.36.199
- [mail # dev]
...Please send questions like this to [EMAIL PROTECTED]. It is not possiblefor us to compile against different versions of hbase and publish differentset of jars and installation. We already do...
, 2015-09-02, 15:20
Re: Problem when running our code with tez
- [mail # dev]
...solution is to use conf.get(³mapreduce.workflow.id²) +conf.get(³mapreduce.workflow.node.name²) Daniel, currently they are set only in vertex conf and will not beavailable for MROutput....
, 2015-08-31, 00:10
[PIG-4654] Reduce tez memory.reserve-fraction and clear spillables for better memory utilization
... Till TEZ-2710 is available just set tez.task.scale.memory.reserve-fraction to 0.5 at AM level. ...
, 2015-08-18, 20:49
[PIG-4652] [Pig on Tez] Key Comparison is slower than mapreduce
...Tez is using PigTupleSortComparator on both map and reduce side and in POShuffleTezLoad. Mapreduce is using PigTupleWritableComparator on the map and reduce side for comparing tuples w...
, 2015-08-12, 19:52
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