Page 81 - Vol.13

input output
HDFS map copy HDFS
sort/merge
split 0 reduce part 0
split 1

split 2 map
split 3
split 4 reduce part 1

map

I am a tiger, you are also a tiger
I , 1
I
am map am , 1
a (1,1)
a
a , 1
also (1) a,2
also,1
tiger , 1 am (1)
tiger sort am,1
you map you , 1 & are (1) reduce are,1
shu e
are I,1
are , 1 I (1)
tiger,2
tiger (1,1) you,1
also , 1
also
you (1)
a map a , 1
tiger
tiger , 1

台 台

需
需
需
機 台

NEW FAB ENGINEERING JOURNAL MARCH 2014 81