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Re: hbase - Hadoop - [mail # general]
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...Mapreduce isn't required. For your query, Hive would be a better fit. On Sun, Apr 10, 2011 at 5:36 AM, Mag Gam wrote: ...
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Author: Ted Yu,
2011-04-10, 13:56
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Re: How to pass a parameter to map ? - Hadoop - [mail # general]
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...You can utilize hadoop Configuration (JobConf). On Thu, Mar 17, 2011 at 1:15 PM, Alessandro Binhara wrote: ...
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Author: Ted Yu,
2011-03-17, 20:57
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Re: Cost of bytecode execution in MapReduce - Hadoop - [mail # user]
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...Are you investigating alternative map-reduce framework ? Please read: http://www.craighenderson.co.uk/mapreduce/ On Thu, Feb 17, 2011 at 9:45 AM, Matthew John wrote: ...
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Author: Ted Yu,
2011-02-17, 21:24
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Re: Cost of bytecode execution in MapReduce - Hadoop - [mail # user]
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...There was a discussion thread about why hadoop was developed in Java. Please read it. On Wed, Feb 16, 2011 at 10:39 PM, Matthew John wrote: ...
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Author: Ted Yu,
2011-02-17, 16:24
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Re: Cost of bytecode execution in MapReduce - Hadoop - [mail # user]
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...Is your target development environment using C++ ? On Wed, Feb 16, 2011 at 9:49 PM, Matthew John wrote: ...
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Author: Ted Yu,
2011-02-17, 06:22
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Re: Externalizing Hadoop configuration files - Hadoop - [mail # user]
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...You need to develop externalization yourself. Our installer uses place holders such as: fs.checkpoint.dir dataFolderPlaceHolder/dfs/namesecondary,backupFolderPlaceHo...
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Author: Ted Yu,
2011-02-16, 23:32
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Re: A slave knows the other in hadoop? - Hadoop - [mail # user]
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...second ? That is not needed. On Wed, Feb 16, 2011 at 10:19 AM, Sandro Simas wrote: ...
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Author: Ted Yu,
2011-02-16, 18:23
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Re: Writing Reducer output to database - Hadoop - [mail # user]
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...Have you noticed this method in DBConfiguration ? public static void configureDB(Configuration conf, String driverClass, String dbUrl, String userName, String pas...
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Author: Ted Yu,
2011-02-07, 04:55
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Re: Writing Reducer output to database - Hadoop - [mail # user]
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...I think you have looked at src/examples/org/apache/hadoop/examples/DBCountPageView.java where: job.setMapOutputKeyClass(Text.class); and: public class Text extends Binary...
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Author: Ted Yu,
2011-02-06, 17:00
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Re: Writing Reducer output to database - Hadoop - [mail # user]
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...At least in cdh3b2, there are two DBOutputFormat.java: ./src/mapred/org/apache/hadoop/mapred/lib/db/DBOutputFormat.java ./src/mapred/org/apache/hadoop/mapreduce/lib/db/DBOutputFormat.j...
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Author: Ted Yu,
2011-02-04, 03:29
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