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MongoDB 自动分片 auto sharding

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Release: 2016-06-07 16:47:17
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MongoDB部署实验系列文章,MongoDB做为NoSQL数据库,最近几年持续升温,越来越多的企业都开始尝试用MongoDB代替原有Database做一

MongoDB部署实验系列文章,MongoDB做为NoSQL数据库,最近几年持续升温,越来越多的企业都开始尝试用MongoDB代替原有Database做一些事情。MongoDB也在集群,分片,,复制上也有相当不错的的表现。我通过将做各种MongoDB的部署实验进行介绍。

第三篇 MongoDB 自动分片 auto sharding,分为6个部分
 1.初始化文件目录
 2.启动shard节点
 3.配置shard节点
 4.插入数据分片实验
 5.删除主分片
 6.重置主分片
 
系统环境介绍:
 
Ubuntu 12.04. LTS 64bit Server
 
1. 初始化文件目录
 
创建目录
 config1,config2,config3是配置节点
 shard1,shard2,shard3是分片节点
 

~ pwd
 /home/conan/dbs
 ~ mkdir config1 config2 config3 shard1 shard2 shard3
 conan@u1:~/dbs$ ls -l
 drwxrwxr-x 3 conan conan 4096 May 31 11:27 config1
 drwxrwxr-x 3 conan conan 4096 May 31 11:27 config2
 drwxrwxr-x 3 conan conan 4096 May 31 11:27 config3
 drwxrwxr-x 3 conan conan 4096 May 31 11:28 shard1
 drwxrwxr-x 3 conan conan 4096 May 31 11:29 shard2
 drwxrwxr-x 3 conan conan 4096 May 31 11:29 shard3
 

2. 启动shard节点
 


启动config节点
 
~ mongod --dbpath /home/conan/dbs/config1 --port 20001 --nojournal --fork --logpath /home/conan/dbs/config1.log
 ~ mongod --dbpath /home/conan/dbs/config2 --port 20002 --nojournal --fork --logpath /home/conan/dbs/config2.log
 ~ mongod --dbpath /home/conan/dbs/config3 --port 20003 --nojournal --fork --logpath /home/conan/dbs/config3.log
 
启动mongos节点
 
~ mongos --configdb localhost:20001,localhost:20002,localhost:20003 --port 30001 --fork --logpath /home/conan/dbs/mongos1.log
 ~ mongos --configdb localhost:20001,localhost:20002,localhost:20003 --port 30002 --fork --logpath /home/conan/dbs/mongos2.log
 
启动shard节点
 
~ mongod --dbpath /home/conan/dbs/shard1 --port 10001 --nojournal --fork --logpath /home/conan/dbs/shard1.log
 ~ mongod --dbpath /home/conan/dbs/shard2 --port 10002 --nojournal --fork --logpath /home/conan/dbs/shard2.log
 ~ mongod --dbpath /home/conan/dbs/shard3 --port 10003 --nojournal --fork --logpath /home/conan/dbs/shard3.log
 
查看端口
 
~ netstat -nlt
 Active Internet connections (only servers)
 Proto Recv-Q Send-Q Local Address Foreign Address State
 tcp 0 0 0.0.0.0:21003 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:10001 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:30001 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:10002 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:30002 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:10003 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:11001 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:31001 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:11002 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:31002 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:11003 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:20001 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:20002 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:20003 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:21001 0.0.0.0:* LISTEN
 tcp 0 0 0.0.0.0:21002 0.0.0.0:* LISTEN
 tcp6 0 0 :::22 :::* LISTEN
 

3. 配置shard节点
 
连接mongos1,在mongos中添加分片:
 
~ mongo localhost:30001/admin
 MongoDB shell version: 2.4.3
 connecting to: localhost:30001/admin
 
mongos> db.runCommand({addshard : "localhost:10001", allowLocal : true})
 { "shardAdded" : "shard0000", "ok" : 1 }
 mongos> db.runCommand({addshard : "localhost:10002", allowLocal : true})
 { "shardAdded" : "shard0001", "ok" : 1 }
 mongos> db.runCommand({addshard : "localhost:10003", allowLocal : true})
 { "shardAdded" : "shard0002", "ok" : 1 }
 


错误的语法:(MongoDB2.0.4已经不支持此语法)
 
mongos> db.runCommand({addshard : "shard1/localhost:10001,localhost:10002",name:"s1", allowLocal : true})
 {
 "ok" : 0,
 "errmsg" : "couldn't connect to new shard socket exception [CONNECT_ERROR] for shard1/localhost:10001,localhost:10002"
 }
 

查看分片信息
 
mongos> db.runCommand({listshards:1})
 {
 "shards" : [
 {
 "_id" : "shard0000",
 "host" : "localhost:10001"
 },
 {
 "_id" : "shard0001",
 "host" : "localhost:10002"
 },
 {
 "_id" : "shard0002",
 "host" : "localhost:10003"
 }
 ],
 "ok" : 1
 }
 
启用数据库分片:fensme
 
mongos> db.runCommand({"enablesharding" : "fensme"})
 { "ok" : 1 }
 

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