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Re: what will happen when HDFS restarts but with some dead nodes - MapReduce - [mail # user]
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...Hi Harsh I have a question. How namenode gets out of safemode in condition of data blocks lost, only administrator? Accordin to my experiences, the NN (0.21) stayed in safemode about s...
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Author: Chen He,
2013-01-30, 16:36
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Re: what will happen when HDFS restarts but with some dead nodes - MapReduce - [mail # user]
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...Hi Nan Namenode will stay in safemode before all blocks are replicated. During this time, the jobtracker can not see any tasktrackers. (MRv1). Chen On Tue, Jan 29, 2013 at ...
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Author: Chen He,
2013-01-30, 03:50
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Re: 回复： compile hadoop failed, src/test/lib does not exist? - MapReduce - [mail # user]
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...hmmm... Interesting, I used to modify the fair-sharing scheduler in hadoop 0.21, there was no problem. Which version you are working on? Chen On Sat, Oct 13, 2012 at 11:28 AM, Na...
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Author: Chen He,
2012-10-13, 16:34
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Re: 回复： compile hadoop failed, src/test/lib does not exist? - MapReduce - [mail # user]
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...addition, the web module package also. Probably your modification affect the interaction between fair-sharing scheduler and the web interface if you did not make mistake on losing library. &...
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Author: Chen He,
2012-10-13, 16:17
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Re: 回复： compile hadoop failed, src/test/lib does not exist? - MapReduce - [mail # user]
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...Hi Nan you can uncheck the test package and have a try. Chen On Sat, Oct 13, 2012 at 10:49 AM, Nan Zhu wrote: ry ，上午11:36，Nan Zhu 写道� �...
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Author: Chen He,
2012-10-13, 16:15
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Re: One petabyte of data loading into HDFS with in 10 min. - MapReduce - [mail # user]
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...If it is not a single file, you can upload them using multiple threads to HDFS. On Wed, Sep 5, 2012 at 7:21 AM, prabhu K wrote: ...
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Author: Chen He,
2012-09-05, 14:03
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Re: directory delete in hadoop - MapReduce - [mail # user]
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...you have to include the hdfs-site.xml and hdfs-default.xml. Because those two files tell you where is the namenode and what is the operation port. On Wed, Sep 5, 2012 at 6:47 AM, Harsh...
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Author: Chen He,
2012-09-05, 13:56
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Re: Custom InputFormat errer - MapReduce - [mail # user]
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...Hi Harsh That means I have to lose my input data because of Hadoop's FileSplit evenly splits input file according to the "numSplits". But, I want to prevent this. Is there any way? &nb...
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Author: Chen He,
2012-08-30, 02:55
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Custom InputFormat errer - MapReduce - [mail # user]
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...Hi guys I met a interesting problem when I implement my own custom InputFormat which extends the FileInputFormat.(I rewrite the RecordReader class but not the InputSplit class) M...
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Author: Chen He,
2012-08-29, 05:43
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