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Re: What's the best disk configuration for hadoop? SSD's Raid levels, etc? - MapReduce - [mail # user]
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...Hi David, your first point : the role of thumb is : "one disk per CPU (or per 1.5 to 2 CPU)" in your case more parrallel IO could be possible with more disks, but as you wrote, ...
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Author: Mirko Kämpf,
2013-05-11, 08:16
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Re: Saving data in db instead of hdfs - MapReduce - [mail # user]
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...Hi, just use Sqoop to push the data from HDFS to a database via JDBC. Intro to Sqoop: http://blog.cloudera.com/blog/2009/06/introducing-sqoop/ Or even use Hive-JDBC to conn...
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Author: Mirko Kämpf,
2013-05-03, 03:34
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Re: Multiple mappers, different parameter values - MapReduce - [mail # user]
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...Hi, I would add an id to the parameter name: "num.iterations.ID=something" If your mapper knows what ID it has it can just pick up this value from the context. But the question is: How...
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Author: Mirko Kämpf,
2013-04-02, 17:04
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Re: Estimating disk space requirements - MapReduce - [mail # user]
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...Hi, some comments are inside your message ... 2013/1/18 Panshul Whisper 11 GB is quite small - or is there a typo? The amount of raw data is about 115 G...
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Author: Mirko Kämpf,
2013-01-18, 12:44
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Re: queues in haddop - MapReduce - [mail # user]
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...I would suggest to work with Flume, in order to clollect a certain number of files and store it to HDFS in larger chunk or write it directly to HBase, this allows random access later on (if ...
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Author: Mirko Kämpf,
2013-01-11, 12:52
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Re: best way to join? - MapReduce - [mail # user]
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...Hi Dexter, I am no sure if I understood your requirements right. So I repet it to define a starting point. 1.) You have a (static) list of points (the points.txt file) 2.) ...
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Author: Mirko Kämpf,
2012-09-09, 09:55
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