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Re: Partition performance - Hive - [mail # user]
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...See slide #9 from my Optimizing Hive Queries talk http://www.slideshare.net/oom65/optimize-hivequeriespptx . Certainly, we will improve it, but for now you are much better off with 1,000 par...
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Author: Owen O'Malley,
2013-04-04, 23:25
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[HIVE-4156] need to add protobuf classes to hive-exec.jar - Hive - [issue]
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...In some queries, the tasks fail when they can't find classes from the protobuf library....
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http://issues.apache.org/jira/browse/HIVE-4156
Author: Owen O'Malley,
2013-04-04, 07:57
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[HIVE-4138] ORC's union object inspector returns a type name that isn't parseable by TypeInfoUtils - Hive - [issue]
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...Currently the typename returned by ORC's union object inspector isn't parseable by TypeInfoUtils. The format needs to be union<type1,type2,type3>....
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http://issues.apache.org/jira/browse/HIVE-4138
Author: Owen O'Malley,
2013-04-04, 07:57
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[HIVE-4000] Hive client goes into infinite loop at 100% cpu - Hive - [issue]
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...The Hive client starts multiple threads to track the progress of the MapReduce jobs. Unfortunately those threads access several static HashMaps that are not protected by locks. When the Hash...
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http://issues.apache.org/jira/browse/HIVE-4000
Author: Owen O'Malley,
2013-04-02, 02:40
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[HIVE-4250] Closing lots of RecordWriters is slow - Hive - [issue]
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...In FileSinkOperator, all of the RecordWriters are closed sequentially. For queries with a lot of dynamic partitions this can add substantially to the task time. For one query in particular, ...
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http://issues.apache.org/jira/browse/HIVE-4250
Author: Owen O'Malley,
2013-03-29, 15:39
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Re: Optimizing hive queries - Hive - [mail # user]
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...On Thu, Mar 28, 2013 at 11:08 PM, Jagat Singh wrote: ORC files like Avro files are self-describing. They include the type structure of the records in the metadata of the file. I...
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Author: Owen O'Malley,
2013-03-29, 06:54
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Re: Optimizing hive queries - Hive - [mail # user]
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...Actually, Hive already has the ability to have different schemas for different partitions. (Although of course it would be nice to have the alter table be more flexible!) The "versione...
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Author: Owen O'Malley,
2013-03-29, 05:48
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[HIVE-4121] ORC should have optional dictionaries for both strings and numeric types - Hive - [issue]
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...Currently string columns always have dictionaries and numerics are always directly encoded. It would be better to make the encoding depend on a sample of the data. Perhaps the first 100k val...
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http://issues.apache.org/jira/browse/HIVE-4121
Author: Owen O'Malley,
2013-03-28, 15:47
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[HIVE-2162] Upgrade dependencies to Hadoop 0.20.2 and 0.20.203.0 - Hive - [issue]
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...Hadoop has released 0.20.203.0 and we should upgrade Hive's dependency to it....
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http://issues.apache.org/jira/browse/HIVE-2162
Author: Owen O'Malley,
2013-03-28, 15:35
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[HIVE-4229] Create a hive-ql jar that doesn't include non-hive jars - Hive - [issue]
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...We currently only ship the ql module as part of the hive-exec jar that includes other projects (thrift, avro, protobuf, commons lang, json, java-ewah, and javolution). This forces downstream...
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http://issues.apache.org/jira/browse/HIVE-4229
Author: Owen O'Malley,
2013-03-26, 18:23
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