Hi,
Is it possible to run a MapReduce job on a part of file on HDFS? The use case
is using a single file on HDFS as a stream to store all log events of a
particular kind. New data can grow on top while Map Reduce can process old
data. Of course one option would be to copy part of data into a
IIRC you can do this, but MR had some issues if you passed it a
non-closed (but sync'd upon) file for splitting.
However, if you run into similar issues, try generating your own
splits over the big file via FileInputFormat#getSplits(…), which will
then work.
On Thu, Nov 1, 2012 at 4:50 AM,
