Matt,
Neither of the books have much information about the new MR API. I was
reading the 'Hadoop - The Definitive Guide' and came across a single pager
on new API. I wanted to try the new MR, but could not find much information
neither in the book nor on the internet.
Thanks,
Praveen
On Sat, Sep 24, 2011 at 8:20 PM, GOEKE, MATTHEW (AG/1000)
matthew.go...@monsanto.com wrote:
Praveen,
** **
Functionality wise you don’t gain much from using the new API and most
would actually recommend that you stay with the old API as it will not be
“officially” deprecated until 0.22 / 0.23 (I can’t remember which one). If
you want to take a look at the classes dig into the packages for
org.apache.hadoop.mapred.* (old) and org.apache.hadoop.mapreduce.* (new).
Also, I thought that Definitive Guide second edition and Hadoop In Action
covered the new api.
** **
Matt
** **
*From:* Praveen Sripati [mailto:praveensrip...@gmail.com]
*Sent:* Saturday, September 24, 2011 8:43 AM
*To:* mapreduce-user@hadoop.apache.org
*Subject:* How to pull data in the Map/Reduce functions?
** **
Hi,
Normally the Hadoop framework calls the map()/reduce() for each record in
the input split. I read in the 'Hadoop : The Definitive Guide' that that
data can be pulled using the new MR API.
What is the new API for pulling the data in the map()/reduce() or is there
a sample code?
Thanks,
Praveen
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