I don\'t understand how to make a job use the same output directory directory to write a different file in it. I have tried commeting
In a 3 node hadoop cluster. I would like the master to be 1 node. Map task taking place in one node and reduce tasks in 1 node. Map and reduce tasks should be separated. Is it possible? As far as i no
I want to run Mahout\'s K-Means example in a hadoop cluster of 5 machines. Which Mahout jar files should I need to keep in all the nodes, in order for the K-Means to be exec开发者_如何学运维uted in a
I have developed around 20 jobs on map reduce including the pagerank algorithm. I never found any challenging pro开发者_Go百科blems to adapt to mapreduce framework online. I would like to improve my s
In mapreduce each reduce task write its output to a file named part-r-nnnnn 开发者_Go百科where nnnnn is a partition ID associated with the reduce task. Does map/reduce merge these files? If yes, how?I
I am new to HDFS and MapReduce and trying to calculate survey statistics. Input file is in this format: Age Points Sex Category - all 4 of them are numbers. Is this the correct start:
Is there any way to retrieve job configuration (some property from the configuration) if I开发者_StackOverflow know job id?
I want to check the contents of an element that is in my map functions, is there a way to print the contents of the variables
I couldn\'t find any documentation 开发者_如何转开发on how hadoop handles splilled records. Is there a link that can be found online.
This question already has answers here: Closed 10 years ago. Possible Duplicate: MultipleOutputFormat in hadoop
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