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Re: Can I merge files after I loaded them into hive? - Hive - [mail # user]
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...Hi chen You can use Flume for ingestion into hdfs . Flume takes care of the file sizes, combines the files and stores as one large file. This is a better approach. You can have ...
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Author: Bejoy KS,
2012-11-15, 08:10
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Re: Hive Join with distinct rows - Hive - [mail # user]
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...Hi Praveen Have you tried applying DISTINCT without the brackets around T1.ID select distinct T1.ID, T1.url, T1.timestamp from T1 LEFT OUTER JOIN T2 on T1.ID T2.ID AND &nbs...
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Author: Bejoy KS,
2012-11-09, 16:26
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Re: Hive compression with external table - Hive - [mail # user]
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...Hi Krishna Sequence Files + Snappy compressed would be my recommendation as well. It can be processed by managed as well as external tables. There is no difference in storage for...
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Author: Bejoy KS,
2012-11-06, 17:22
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Re: Creating Indexes - Hive - [mail # user]
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...AFAIK you don't any hive jars on cluster. The hive jars are just required on the client node . Regards Bejoy KS Sent from handheld, please excuse typos. From: Dean Wampler ...
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Author: Bejoy KS,
2012-11-01, 13:09
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Re: FAILED: Hive Internal Error - Hive - [mail # user]
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...Hi Sagar Your JT web UI should work fine as JobTracker daemon is up and running but the dfs web UI http://localhost:50070 will not work as NameNode is not up and running. The iss...
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Author: Bejoy KS,
2012-10-27, 12:42
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Re: Executing queries after setting hive.exec.parallel in hive-site.xml - Hive - [mail # user]
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...Hi Chunky This parameter will come into effect only if a query has been parsed to multiple mapreduce jobs and some of them can be executed in parallel. ie all the jobs generated by the...
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Author: Bejoy KS,
2012-10-25, 12:42
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Re: Query - Hive - [mail # user]
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...Hi Venugopal If you like to have your column names along with result set you need to set 'hive.cli.print.header' to true. SET hive.cli.print.header=true; It works well over...
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Author: Bejoy KS,
2012-10-23, 06:54
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Re: How to run multiple Hive queries in parallel - Hive - [mail # user]
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...Hi From the jobtracker web UI you can get the total number of map and reduce slots. Also from the wen UI itself you can get the num of running map/reduce tasks. Second value subtracte...
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Author: Bejoy KS,
2012-10-22, 15:10
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Re: How to run multiple Hive queries in parallel - Hive - [mail # user]
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...Hi Is your hive queries in waiting mode even though there are task slots available on your cluster? If task slots are getting exhausted and you need parallelism here, then you ma...
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Author: Bejoy KS,
2012-10-22, 12:18
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Re: Implementing a star schema (facts & dimension model) - Hive - [mail # user]
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...Hi Austin You can import the existing tables to hive as such using sqoop. Hive is a wrapper over mapreduce that gives you the flexibility to create optimized mapreduce jobs using SQL l...
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Author: Bejoy KS,
2012-10-22, 11:29
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