#mongodb
mongodb Api http://docs.mongodb.org/manual/
mongodb node-driver api http://mongodb.github.io/node-mongodb-native/1.4/api-generated/collection.html
mongodb基础知识 http://christiankvalheim.com/post/a_basic_introduction_to_mongodb/
连接池 https://blog.compose.io/node-js-mongodb-and-pool-pollution-problems/
http://www.infoq.com/articles/data-model-mongodb
http://www.toadworld.com/platforms/nosql/w/wiki/343.mongodb-and-e-commerce.aspx#Querying_Orders
/******************************/
#take advantage of indexes
$in、$all
#cann't take advantage of indexes
$nin、$ne、$size、$where、$regex、$mod
combination with another query term that does use an index
启动数据库
mongod --dbpath "D:\mongodb\data\db" --logpath "D:\mongodb\log\MongoDB.log"
创建集群
mongod --replSet myapp --dbpath "D:\mongodb\data\db" --port 4000
mongod --replSet myapp --dbpath "D:\mongodb\data\db2" --port 4001
mongod --replSet myapp --dbpath "D:\mongodb\data\arbiter" --port 4002
mongo --port 4000 连接主节点
rs.add("host:4001")添加副节点
rs.add("host:4002", {arbiterOnly: true})添加仲裁者