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From "David Parks" <davidpark...@yahoo.com>
Subject Mapreduce jobs to download job input from across the internet
Date Wed, 17 Apr 2013 04:26:56 GMT
For a set of jobs to run I need to download about 100GB of data from the
internet (~1000 files of varying sizes from ~10 different domains).


Currently I do this in a simple linux script as it's easy to script FTP,
curl, and the like. But it's a mess to maintain a separate server for that
process. I'd rather it run in mapreduce. Just give it a bill of materials
and let it go about downloading it, retrying as necessary to deal with iffy
network conditions.


I wrote one such job to craw images we need to acquire, and it was the
royalist of royal pains. I wonder if there are any good approaches to this
kind of data acquisition task in Hadoop. It would certainly be nicer just to
schedule a data-acquisition job ahead of the processing jobs in Oozie rather
than try to maintain synchronization between the download processes and the




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