Hi,
I'm trying to understand how to generate multiple outputs in my reducer (using
0.20.2+228).
Do I need MultipleOutput or should I partition my output in the mapper?
My reducer currently gets key/val input pairs like this which all end up in my
part_r_0000 file.
hostA_VarX_2010-05-01_morning <FLOATVAL>
hostA_VarY_2010-05-01_morning <FLOATVAL>
hostA_VarX_2010-05-01_afternoon <FLOATVAL>
hostA_VarY_2010-05-01_afternoon <FLOATVAL>
.....
hostB_VarX_2010-05-01_morning <FLOATVAL>
hostB_VarY_2010-05-01_morning <FLOATVAL>
hostB_VarX_2010-05-01_afternoon <FLOATVAL>
hostB_VarY_2010-05-01_afternoon <FLOATVAL>
.....
hostA_VarX_2010-05-02_morning <FLOATVAL>
hostA_VarY_2010-05-02_morning <FLOATVAL>
hostA_VarX_2010-05-02_afternoon <FLOATVAL>
hostA_VarY_2010-05-02_afternoon <FLOATVAL>
.....
hostB_VarX_2010-05-02_morning <FLOATVAL>
hostB_VarY_2010-05-02_morning <FLOATVAL>
hostB_VarX_2010-05-02_afternoon <FLOATVAL>
hostB_VarY_2010-05-02_afternoon <FLOATVAL>
.....
But instead of 1 output file I want one output file per day/group. e.g.
2010-05-01_morning.txt
2010-05-01_afternoon.txt
Each <date>_<time>.txt file would contain all keys/vals for all hosts &
VarNames
Thanks,
Alan
