12.26 MapReduce初级编程实践3

（三）对给定的表格进行信息挖掘

下面给出一个child-parent的表格，要求挖掘其中的父子辈关系，给出祖孙辈关系的表格。

输入文件内容如下：

child          parent

Steven        Lucy

Steven        Jack

Jone         Lucy

Jone         Jack

Lucy         Mary

Lucy         Frank

Jack         Alice

Jack         Jesse

David       Alice

David       Jesse

Philip       David

Philip       Alma

Mark       David

Mark       Alma

 

输出文件内容如下：

grandchild       grandparent

Steven          Alice

Steven          Jesse

Jone            Alice

Jone            Jesse

Steven          Mary

Steven          Frank

Jone            Mary

Jone            Frank

Philip           Alice

Philip           Jesse

Mark           Alice

Mark           Jesse