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Re: Recover dfs/name - MapReduce - [mail # user]
...Hi Han,  HDFS metadata cannot be fully reconstructed by datanode report.  If you have deployed a checkpoint node/secondary namenode, you can copy the metadata to namenode and resta...
   Author: Ted Xu, 2013-06-05, 09:51
Re: one new bie question - MapReduce - [mail # user]
...Hi Balson,  Have you tried NLineInputFormat? You can find example of NLineInputFormat here: http://goo.gl/aVzDr.   On Thu, May 9, 2013 at 2:53 PM, Balachandar R.A. wrote:   &n...
   Author: Ted Xu, 2013-05-09, 07:25
Re: Namenode going to safe mode on YARN - MapReduce - [mail # user]
...Hi Kishore,  It should not be a bug. After restarting HDFS, namenode will enter safe mode until all needed data is collected. During safe mode, all update operations will fail.  In...
   Author: Ted Xu, 2013-05-06, 09:26
Re: M/R job optimization - MapReduce - [mail # user]
...Hi Han,  I think your point is valid. In fact you can change the progress report logic by manually calling the Reporter API, but by default it is quite straight forward. Reducer progres...
   Author: Ted Xu, 2013-04-29, 15:59
[expand - 1 more] - Re: Warnings? - MapReduce - [mail # user]
...Hi Kevin,  Native libraries are those implemented using C/C++, which only provide code level portability (instead of binary level portability, as Java do). That is to say, the binaries ...
   Author: Ted Xu, 2013-04-29, 15:31
Re: Reading Counters - MapReduce - [mail # user]
...Rajan,  It is possible for clients to read counters using Java API. You can create an RPC proxy to retrieve them ( by calling  RPC.getProxy() ). In fact the hadoop command use that...
   Author: Ted Xu, 2010-02-06, 00:20
Re: Rewriting in image resizing program in terms of map reduce - MapReduce - [mail # user]
...Hi Daniel,  I think there are better solutions, but simply chop the input file into pieces ( i.e. 10 urls per file ) shall work.  2009/12/4 Daniel Garcia   Best Regards,  ...
   Author: Ted Xu, 2009-12-05, 01:34
[expand - 1 more] - Re: MapReduce Child don't exit? - MapReduce - [mail # user]
...Thanks for the reply, that's very helpful.  I think it is a bug for DFSClient. 2009/11/17 Jason Venner     Best Regards,  Ted Xu...
   Author: Ted Xu, 2009-11-18, 01:54
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