MongoDB学习收拾之Sharding
环境准备：
启动Shard服务器：
/app/mongo/mongodb/bin/mongod --shardsvr --port 20000 --dbpath=/app/mongo/mongodb/data/shard/s0
--fork --logpath=/app/mongo/mongodb/data/shard/log/s0.log --directoryperdb
/app/mongo/mongodb/bin/mongod --shardsvr --port 20001 --dbpath=/app/mongo/mongodb/data/shard/s1
--fork --logpath=/app/mongo/mongodb/data/shard/log/s1.log --directoryperdb
启动Config服务器：
/app/mongo/mongodb/bin/mongod --configsvr --port 30000 --dbpath=/app/mongo/mongodb/data/shard/config
--fork --logpath=/app/mongo/mongodb/data/shard/log/config.log --directoryperdb
启动Route process
/app/mongo/mongodb/bin/mongos --port 40000 --configdb localhost:30000
--fork --logpath=/app/mongo/mongodb/data/shard/log/route.log --chunkSize 1
配置Sharding
登录路由控制器上添加Shard节点,进行配置Sharding
/app/mongo/mongodb/bin/mongo admin --port 40000 连接路由
>db.runCommand({addshard:"localhost:20000"}) 添加本地端口20000的Shard Server实例
>db.runCommand({addshard:"localhost:20001"})
>db.runCommand({enablesharding:"test"}) 设置在test数据库上执行分片
>db.runCommand({shardcollection:"test.users",key:{_id:1}}) 设置在test数据库的users表上分片，同时指明id为shard key
验证Sharding
>use test
>for(var i=1;i<500000;i++){db.users.insert({age:i,name:"liangzhangping",addr:"beijing",country:"china"})}
>db.users.stats()
维护Sharding信息
1、列出所有的Shard Server
>db.runCommand({listshards:1})
2、查看Sharding信息
>printShardingStatus()
3、判断是否是Sharding
>db.runCommand({isdbgrid:1})
4、对现有的表执行Sharding
>db.runCommand({shardcollection:"test.users",key:{_id:1}})
新增Shard Server
1、创建新增Shard Server数据目录
mkdir -p /app/mongo/mongodb/data/shard/s2
2、启动Shard Server
/app/mongo/mongodb/bin/mongod --shardsvr --port 20002 --dbpath=/app/mongo/mongodb/data/shard/s2 --fork --logpath=/app/mongo/mongodb/data/shard/log/s2.log --directoryperdb
3、添加Shard Server到Sharding环
>db.runCommand({addshard:"localhost:20002"})
移除Shard Server
>use admin
>db.runCommand({"removeshard":"localhost:20002"})