Map-Reduce with Tokyo Cabinet

Executing map-reduce jobs within Tokyo Cabinet

Starting server with incr extension

  > ttserver -ext wordcount.lua test.tch

Executing from command line

  > tcrmgr put localhost 1 "This is a pen."
  > tcrmgr put localhost 2 "Hello world"
  > tcrmgr put localhost 2 "Life is good"
  > tcrmgr ext localhost wordcount
    a   1
    good        1
    is  2
    life        1
    pen 1
    this        1

Executing via Ruby

  > ruby wordcount.rb
    a   1
    beautiful   1
    bob 1
    hello       2
    what        1
    world       2

Source: alpha.mixi.co.jp/blog/?p=566