Hello, Just do a quick search for chain map reduce you would get example.
Regards, Jagat Singh ----------- Sent from Mobile , short and crisp. On 11-Jun-2012 8:40 AM, "Liu, Keyan (NSN - CN/Beijing)" <keyan....@nsn.com> wrote: > ** > > Hi All, > > I am using Mapreduce to scan HBase region to get the rowkey_list that > related with one query. > > In Map period, each mapper outputs partial rowkey_list. In reduce period, > the reducer will collect and sort all rowkey. > > If I need to use rowkey_list result of the reduce, how can transport the > rowkey_list outside reduce? > > I have tried to write one reduce output to HDFS “/part-r-00000”, then > read the result in HDFS, but I found the efficiency is too low. > > How can I use the reduce result in next code part? Is there one API or > example that can be used? > > Thanks. > > Regards, > > William Liu >
