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[HADOOP-9262] Allow jobs to override the input Key/Value read from a sequence file's headers - Hadoop - [issue]
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...There's no clean way to upgrade a sequence file when the model objects in an existing sequence file change in the development process.If we could override the Key/Value class types read from...
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http://issues.apache.org/jira/browse/HADOOP-9262
Author: David Parks,
2013-01-30, 02:28
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[HADOOP-9240] Making ArrayWritable typed - Hadoop - [issue]
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...ArrayWritable is just painful to use in practice, it would be nice if we had a typed version of ArrayWritable that had all the features of an ArrayList.It wasn't hard to write, and it doesn'...
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http://issues.apache.org/jira/browse/HADOOP-9240
Author: David Parks,
2013-01-24, 09:33
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RE: Map tasks processing some files multiple times - Hadoop - [mail # user]
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...I'm using multiple inputs because I actually have another type of input with a different mapper, a single, unrelated file, that I omitted from this discussion for simplicity. The basic formu...
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Author: David Parks,
2012-12-07, 03:57
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RE: Map tasks processing some files multiple times - Hadoop - [mail # user]
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...I believe I just tracked down the problem, maybe you can help confirm if you’re familiar with this. I see that FileInputFormat is specifying that gzip files (.gz extension) fro...
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Author: David Parks,
2012-12-06, 07:36
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Map tasks processing some files multiple times - Hadoop - [mail # user]
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...I've got a job that reads in 167 files from S3, but 2 of the files are being mapped twice and 1 of the files is mapped 3 times. This is the code I use to set up the mapper: &nb...
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Author: David Parks,
2012-12-06, 06:15
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RE: Question on Key Grouping - Hadoop - [mail # user]
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...First rule to be wary of is your use of the combiner. The combiner *might* be run, it *might not* be run, and it *might be run multiple times*. The combiner is only for reducing the amount o...
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Author: David Parks,
2012-12-05, 01:43
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Moving files - Hadoop - [mail # user]
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...I want to move a file in HDFS after a job using the Java API, I'm trying this command but I always get false (could not rename): Path from = new Path("hdfs://localhost/process-changes...
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Author: David Parks,
2012-11-25, 02:34
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RE: Large input files via HTTP - Hadoop - [mail # user]
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...I might very well be overthinking this. But I have a cluster Im firing up on EC2 that I want to keep utilized. I have some other unrelated jobs that dont need to wait for...
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Author: David Parks,
2012-10-24, 04:06
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