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RE: Which hadoop installation should I use on ubuntu server? - MapReduce - [mail # user]
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...Hmm, seems intriguing. I'm still not totally clear on bigtop here. It seems like they're creating and maintain basically an installer for Hadoop? I tried following their docs f...
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Author: David Parks,
2013-03-29, 08:09
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RE: - MapReduce - [mail # user]
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...Can I suggest an answer of "Yes, but you probably don't want to"? As a "typical user" of Hadoop you would not do this. Hadoop already chooses the best server to do the work based...
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Author: David Parks,
2013-03-25, 07:16
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RE: For a new installation: use the BackupNode or the CheckPointNode? - MapReduce - [mail # user]
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...So... the answer is... SecondaryNameNode is what I should be installing here. And the SecondaryNameNode is essentially just an earlier version of the checkpoint node, in terms of functionali...
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Author: David Parks,
2013-03-24, 01:21
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How do _you_ document your hadoop jobs? - MapReduce - [mail # user]
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...We've taken to documenting our Hadoop jobs in a simple visual manner using PPT (attached example). I wonder how others document their jobs? We often add notes to the text secti...
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Author: David Parks,
2013-02-25, 09:11
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RE: How can I limit reducers to one-per-node? - MapReduce - [mail # user]
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...Looking at the Job File for my job I see that this property is set to 1, however I have 3 reducers per node (I’m not clear what configuration is causing this behavior). My prob...
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Author: David Parks,
2013-02-09, 04:46
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RE: How can I limit reducers to one-per-node? - MapReduce - [mail # user]
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...Hmm, odd, I’m using AWS Mapreduce, and this property is already set to 1 on my cluster by default (using 15 m1.xlarge boxes which come with 3 reducer slots configured by default). &nb...
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Author: David Parks,
2013-02-09, 04:24
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How can I limit reducers to one-per-node? - MapReduce - [mail # user]
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...I have a cluster of boxes with 3 reducers per node. I want to limit a particular job to only run 1 reducer per node. This job is network IO bound, gathering images from a set o...
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Author: David Parks,
2013-02-09, 03:54
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RE: Tricks to upgrading Sequence Files? - MapReduce - [mail # user]
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...I'll consider a patch to the SequenceFile, if we could manually override the sequence file input Key and Value that's read from the sequence file headers we'd have a clean solution. I ...
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Author: David Parks,
2013-01-30, 02:17
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Tricks to upgrading Sequence Files? - MapReduce - [mail # user]
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...Anyone have any good tricks for upgrading a sequence file. We maintain a sequence file like a flat file DB and the primary object in there changed in recent development. ...
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Author: David Parks,
2013-01-29, 07:41
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Symbolic links available in 1.0.3? - MapReduce - [mail # user]
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...Is it possible to use symbolic links in 1.0.3? If yes: can I use symbolic links to create a single, final directory structure of files from many locations; then use DistCp/S3Di...
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Author: David Parks,
2013-01-29, 03:31
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