MongoDB分布式

安装

scp mongodb-linux-x86_64-2.6.0.tgz user@host:/home/user/
ssh  user@host
tar zxvf mongodb-linux-x86_64-2.6.0.tgz
mv mongodb-linux-x86_64-2.6.0 mongodb
cd mongodb/
mkdir db

配置环境

sudo vi /etc/profile

#mango
export MANGO_HOME=/home/user/mongodb
export PATH=$MANGO_HOME/bin:$MANGO_HOME:$PATH 

source  /etc/profile

运行

(Pic src:http://docs.mongodb.org/manual/core/sharding-introduction/)

Diagram of a sample sharded cluster for production purposes. Contains exactly 3 config servers, 2 or more mongos query routers, and at least 2 shards. The shards are replica sets.

(pic src:http://blog.fens.me/mongodb-shard/)

#所有从服务器slave运行一个/两个终端
export LC_ALL="en_US.UTF-8"
mongod --dbpath ~/hadoop/mongodb/db/
mongo
#主服务器hdp001 运行3个终端
mongos --configdb hdp001
mongod --configsvr
mongo

shard

#添加节点
sh.addShard("hdp002:27017")

sh.enableSharding("test")
sh.shardCollection("test.people", {user_id:1})
db.ss.insert( { name : "mongo" })
然后在hdp002就有同步的数据了。其他从服务器类似


#删除节点
use admin
db.runCommand({ movePrimary : "test", to : "config" })
db.runCommand( { removeShard :"shard0000"})