MongoDB

26 Jun 2016 in Getting Started on Mongodb

Install MongoDB for Windows.

MongoDB 사이트에서 바이너리 버전을 다운로드 받고 압축을 푼다.

http://downloads.mongodb.org/win32/mongodb-win32-x86_64-2008plus-ssl-3.4.1.zip

D:\dev\mongodb

Set up the MongoDB environment.

데이터 디렉토리를 생성한다.

cd D:\dev\mongodb
mkdir C:\data\db

Start MongoDB

mongod --rest
OR
mongod --dbpath D:\dev\mongodb\data --rest

Connect to MongoDB

mongo

Connect to Monitoring Web

http://localhost:28017/

MapReduce

db.words.save({text:'read a book'});
db.words.save({text:'write a book'});
db.words.find();

map = function() { 
  var res = this.text.split(' '); 
  for (var i in res) { 
    key = {word:res[i]}; 
    value = {count:1}; 
    emit(key, value); 
  } 
}

reduce = function(key, values) { 
  var totalcount = 0; 
  for (var i in values) { 
    totalcount = values[i].count + totalcount; 
  } 
  return {count:totalcount}; 
}

db.words.mapReduce(map, reduce, "wordcount");
db.wordcount.find();