There's Chain-Mapping and Chain-Reducing available. With good docs:
http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/mapred/lib/ChainReducer.html
However, something as simple as Twister (which has iterative
mapreduces based on a while-like condition loop) isn't directly
available
Hello,
I have not used Hadoop but am researching it for an analytics project. I
would like to know if Hadoop supports continuous or incremental map reduce
functionality. If not, are there any plans to add it?
Thanks,
Stephen
With new api, next method reads key and value into member variables, and the
key and value read by next method can read by getCurrentKey() and
getCurrentValue(). For example see LineRecoredReader, SequenceFileRecordReader
in org.apache.hadoop.mapreduce.lib.input package.
Thanks
Amareshwari
On
+mahout-user
On Tue, Aug 24, 2010 at 5:37 PM, Shuja Rehman wrote:
> Hi
> I am trying to convert Mahout xmlInputFormat to new API but this is not
> working. The problem which i think is that in old api we have next method
> which takes key and value and we can set it in the method
>
> public
Hi
I am trying to convert Mahout xmlInputFormat to new API but this is not
working. The problem which i think is that in old api we have next method
which takes key and value and we can set it in the method
public boolean next(LongWritable key, Text value) throws IOException {
but in new API,
