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Re: changing SequenceFile format - Hadoop - [mail # user]
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...I think You can modify Writer's append method, and Reader's next method. On Mon, Sep 13, 2010 at 5:15 PM, Matthew John wrote: Best Regards Jeff Zhang...
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Author: Jeff Zhang,
2010-09-13, 10:06
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Re: Problem in copyFromLocal - Hadoop - [mail # user]
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...check the data node's log to see whether it starts correctly On Thu, Sep 9, 2010 at 8:51 AM, Medha Atre wrote: Node_Cluster%29(as ny ut e Namesystem.java:1448) 0) ve Method) mpl...
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Author: Jeff Zhang,
2010-09-10, 01:08
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Re: How to disable secondary node - Hadoop - [mail # user]
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...then, do not start secondary namenode ( comment the last line of start-dfs.sh # "$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR --hosts masters start secondarynamenode )...
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Author: Jeff Zhang,
2010-09-09, 07:08
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Re: How to rebuild Hadoop ?? - Hadoop - [mail # user]
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...Matthew, InputFormat will been used in client side, so you should combine the hadoop-0.20.2.jar and hadoop-example.jar into one single jar On Wed, Sep 8, 2010 at 2:58 AM, ...
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Author: Jeff Zhang,
2010-09-08, 10:27
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Re: How to rebuild Hadoop ?? - Hadoop - [mail # user]
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...Mattew, Do you still put your source code in the io package and mapred package ? If so, rebuild and hadoop core (seems you have done), and then invoke the command bin/hadoop -jar...
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Author: Jeff Zhang,
2010-09-08, 08:55
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Re: How to rebuild Hadoop ?? - Hadoop - [mail # user]
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...Do you run "ant example" ? On Tue, Sep 7, 2010 at 10:29 PM, Matthew John wrote: Best Regards Jeff Zhang...
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Author: Jeff Zhang,
2010-09-08, 05:36
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Re: How to rebuild Hadoop ?? - Hadoop - [mail # user]
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...Matthew, You should put your code in the example source folder, and rebuild the example. And use the new generated hadoop*version*example.jar in the build folder. PS: each mapred...
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Author: Jeff Zhang,
2010-09-08, 04:34
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Re: change HDFS block size - Hadoop - [mail # user]
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...Those lagacy files won't change block size (NameNode have the mapping between block and file) only the new added files will have the block size of 128m On Tue, Sep 7, 2010 at 7:...
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Author: Jeff Zhang,
2010-09-08, 03:03
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Re: where distributed cache start working - Hadoop - [mail # dev]
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...Do you debug it using LocalJobRunner ? In local mode, TaskRunner won't been called. In local mode, mapper task runs in thread rather than forked jvm. The TaskRunner only been called in distr...
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Author: Jeff Zhang,
2010-08-23, 04:47
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Re: where distributed cache start working - Hadoop - [mail # dev]
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...Hi Gang, In the TaskRunner's run() method, hadoop will download the cache files which you set on the client side to local, then the forked child jvm can use these cache files locally. ...
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Author: Jeff Zhang,
2010-08-20, 15:22
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