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Re: Using NFS mounted volume for Hadoop installation/configuration - Hadoop - [mail # user]
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...Cloudera manager or Zettaset can be a choice if you like easy configuration. This type of software will do the rysnc for you. On Mon, Feb 18, 2013 at 12:53 PM, Mehmet Belgin wrot...
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Author: Chen He,
2013-02-18, 19:01
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Re: Using NFS mounted volume for Hadoop installation/configuration - Hadoop - [mail # user]
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...To use NFS as datanode fs may bring performance problems. Millions of requests may block your NFS server. On Mon, Feb 18, 2013 at 12:09 PM, Chris Embree wrote: ...
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Author: Chen He,
2013-02-18, 18:17
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Re: what will happen when HDFS restarts but with some dead nodes - Hadoop - [mail # user]
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...That is correct if you do not manually exit NN safemode. Regards Chen On Jan 30, 2013 8:59 AM, "Jean-Marc Spaggiari" wrote: ...
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Author: Chen He,
2013-01-30, 15:28
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Re: Instructions on how to run Apache Hadoop 2.0.2-alpha? - Hadoop - [mail # user]
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...Hi Glen I agree with you. There are many versions and confusing. If you really want to know, you can check the developing and publishing documents. In 0.23's document, they must announ...
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Author: Chen He,
2013-01-04, 16:17
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Re: Instructions on how to run Apache Hadoop 2.0.2-alpha? - Hadoop - [mail # user]
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...0.24 is the developing version, 2.0.2 is the publication version. 0.23 or above is published as 2.0.x On Fri, Jan 4, 2013 at 5:45 AM, Glen Mazza wrote: ...
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Author: Chen He,
2013-01-04, 12:02
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Re: more reduce tasks - Hadoop - [mail # user]
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...Hi Bejoy Thank you for your idea. The hadoop patch I said means this merge happens during the output writing process. Regards! Chen On Jan 3, 2013 11:25 PM, wro...
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Author: Chen He,
2013-01-04, 05:32
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Re: more reduce tasks - Hadoop - [mail # user]
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...Sounds like you want more reducer to reduce the execution time but only want a single output file. Is this waht you want? You can use as many as your want (may not be optimal) re...
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Author: Chen He,
2013-01-04, 04:55
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Re: migrate cluster to different datacenter - Hadoop - [mail # user]
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...sometimes, physically moving hard drives helps. :) On Aug 3, 2012 1:50 PM, "Patai Sangbutsarakum" wrote: ...
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Author: Chen He,
2012-08-03, 19:40
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Re: Re: HDFS block physical location - Hadoop - [mail # user]
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...For block to filename mapping, you can get from my previous answer. For block to harddisk mapping, you may need to traverse all the directory that used for HDFS, I am sure your OS has ...
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Author: Chen He,
2012-07-25, 22:20
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Re: HDFS block physical location - Hadoop - [mail # user]
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...Hope this helps. On Wed, Jul 25, 2012 at 5:17 PM, wrote: ...
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Author: Chen He,
2012-07-25, 21:33
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