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Re: joining user sessions - Hive - [mail # user]
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...Hi, If one of your tables are small enough then you can go in for map side joins, which actually distributes the smaller table contents into the distributed cache and then perform the ...
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Author: Bejoy KS,
2012-06-13, 16:52
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Re: Hive Mapside join with Distributed cache - Hive - [mail # user]
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...You just need to enable map joins before executing your join query. hive> Set hive.auto.convert.join=true Regards Bejoy KS Sent from handheld, please excuse typos. From:...
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Author: Bejoy KS,
2012-06-11, 16:03
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Re: Error while Creating Table in Hive - Hive - [mail # user]
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...Hi Babak You gotta follow those instructions in the apace site to set up hadoop from scratch and ensure that hdfs is working first. You should be able to read and write files to hdfs b...
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Author: Bejoy KS,
2012-06-05, 19:55
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Re: Re[2]: from-insert-select trouble - Hive - [mail # user]
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...Great, good catch.. Not enough child heap size available to process your data volume. If you have free memory available just increase child.opts memory and it may pass through as well. ...
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Author: Bejoy KS,
2012-05-22, 13:07
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Re: Reduce operation stuck - Hive - [mail # user]
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...Hi Balaji How many reduce tasks are being triggered? If more than 1, how many of them are completed and and how many are still running? Can you try increasing the number of reduce task...
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Author: Bejoy KS,
2012-05-19, 04:15
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Re: Is there a way to create user account and grant read only permissions? - Hive - [mail # user]
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...Hi patrick The Authorization mechanisms in hive are not as solid as other RDBMS. A user can grant himself rights and can then drop a table or do whatever operations he l...
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Author: Bejoy KS,
2012-05-19, 04:08
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Re: Want to improve the performance for execution of Hive Jobs. - Hive - [mail # user]
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...Hi Bhavesh On a job level, if you set/override some properties it won't go into mapred-site.xml. Check your corresponding Job.xml to get the values. Also confirm from tas...
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Author: Bejoy KS,
2012-05-08, 12:02
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Re: how can I escape hive CLI output - Hive - [mail # user]
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...Hi Hdfs/hive to any RDBMS , sqoop is the right tool to go for. It is exclusively meant for to and fro parallel data transfers between Rdbms and hdfs. Regards Bejoy KS &n...
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Author: Bejoy KS,
2012-05-04, 19:22
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Re: Distributed execution for UNION ALL - Hive - [mail # user]
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...Hi Alexander Are you have a single node execution issue only for this particular query that involves Union all or is it same across all hive queries. Regards Bejoy...
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Author: Bejoy KS,
2012-05-04, 13:58
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Re: How to make the query compiler not determine the number of reducers? - Hive - [mail # user]
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...Thomas, It needn't be the case, raising your map tasks may not have any effect on reduce tasks. May be we can help you out if you could provide some details like : ...
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Author: Bejoy KS,
2012-04-30, 14:14
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