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Re: Reduce operation stuck - Hive - [mail # user]
...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...
   Author: Bejoy KS, 2012-05-19, 04:15
Re: Is there a way to create user account and grant read only permissions? - Hive - [mail # user]
...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...
   Author: Bejoy KS, 2012-05-19, 04:08
Re: Want to improve the performance for execution of Hive Jobs. - Hive - [mail # user]
...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...
   Author: Bejoy KS, 2012-05-08, 12:02
Re: how can I escape hive CLI output - Hive - [mail # user]
...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...
   Author: Bejoy KS, 2012-05-04, 19:22
Re: Distributed execution for UNION ALL - Hive - [mail # user]
...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...
   Author: Bejoy KS, 2012-05-04, 13:58
[expand - 1 more] - Re: How to make the query compiler not determine the number of reducers? - Hive - [mail # user]
...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 :  ...
   Author: Bejoy KS, 2012-04-30, 14:14
Re: external table on flume log files in S3 - Hive - [mail # user]
...Hi Soren       If you can collect or order the log files into date based sub dirs in S3. Then you can partition the table based on date. With partitions you can query a subset...
   Author: Bejoy KS, 2012-04-24, 14:30
[expand - 3 more] - Re: When/how to use partitions and buckets usefully? - Hive - [mail # user]
...If data is in hdfs, then you can bucket it only after loading into a temp/staging table and then to the final bucketed table. Bucketing needs a Map reduce job.   Regards Bejoy KS  ...
   Author: Bejoy KS, 2012-04-23, 16:39
Re: Postgres JDBC + dboutput UDF to export from Hive to remote Postgres - Hive - [mail # user]
...Hi Abshiek        To transfer data between rdbms and hadoop Sqoop is the preferred and recommended option. Once you have the process done in hive the output data can be e...
   Author: Bejoy KS, 2012-03-29, 10:12
Re: Zero Byte file in HDFS - Hive - [mail # user]
...Hi Abshiek   Merging happens as a last stage of hive jobs. Say your hive query is translated to n MR jobs when you enable merge you can set a size that is needed to merge (usually block...
   Author: Bejoy KS, 2012-03-26, 21:51
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