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phases of Hadoop Jobs - Hadoop - [mail # user]
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...Hi, all recently, I was hit by a question, "how is a hadoop job divided into 2 phases?", In textbooks, we are told that the mapreduce jobs are divided into 2 phases, map and red...
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Author: Nan Zhu,
2011-09-19, 02:24
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Re: Any related paper on how to resolve hadoop SPOF issue? - Hadoop - [mail # dev]
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...Hope it helps http://www.springerlink.com/content/h17r882710314147/ Best, Nan On Thu, Aug 25, 2011 at 5:43 PM, George Kousiouris wrote: Nan Zhu School of...
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Author: Nan Zhu,
2011-08-25, 09:46
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Re: Hadoop Meetup in Sept in Shanghai - Hadoop - [mail # user]
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...Hi, I'm interested in it, any more details? Best, Nan On Wed, Aug 17, 2011 at 7:42 AM, Michael Lv wrote: Nan Zhu School of Electronic, Information ...
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Author: Nan Zhu,
2011-08-17, 01:18
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How Hadoop is deployed - Hadoop - [mail # general]
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...Hi, all My question is that how hadoop system is deployed in your data centers? the Hadoop workload is always memory-intensive, and sometimes, it occupies large proportion of ne...
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Author: Nan Zhu,
2011-07-31, 04:52
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Re: nomenclature - Hadoop - [mail # user]
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...For MapReduce, I always call them "JobTracker" and "TaskTracker", for HDFS, "Namenode" and "DataNode" because of the name of classes in source code???:-) Nan On Mon, Jun 13...
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Author: Nan Zhu,
2011-06-13, 00:28
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Re: How HDFS decides where to put the block - Hadoop - [mail # dev]
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...Yes, that's it Thanks Nan On Mon, Apr 18, 2011 at 10:16 PM, Harsh J wrote: Nan Zhu School of Software,5501 Shanghai Jiao Tong University 800,Dongchuan R...
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Author: Nan Zhu,
2011-04-18, 15:15
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How HDFS decides where to put the block - Hadoop - [mail # dev]
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...Hi, all I'm confused by a question that "how does the HDFS decide where to put the data blocks " I mean that the user invokes some commands like "./hadoop put ***", we assume tha...
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Author: Nan Zhu,
2011-04-18, 13:46
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Re: Re: how to get each task's process - Hadoop - [mail # user]
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...Oh, I missed that..shy..... TaskRunner is extended from thread, I think Thread.currendThread().getName() may be the answer But I have a impression on that the java api cann...
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Author: Nan Zhu,
2011-03-29, 15:55
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Re: how to get each task's process - Hadoop - [mail # user]
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...TaskStatus.getprogress() is helpful Best, Nan 2011/3/29 朱韬 to Nan Zhu School of Software,5501 Shanghai Jiao Tong University 800,Dongchuan Road,Shanghai,China...
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Author: Nan Zhu,
2011-03-29, 15:05
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Re: modification to Hadoop Jobtracker - Hadoop - [mail # dev]
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...Hi, bikash I also worked on this several months ago, If I don't have a wrong memory, the involved files should be: JobTracker.java, TaskTracker.java, the most interesting f...
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Author: Nan Zhu,
2011-03-18, 18:12
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