Home >Database >Mysql Tutorial >MongoDB 自动分片 auto sharding

MongoDB 自动分片 auto sharding

WBOY
WBOYOriginal
2016-06-07 16:47:171115browse

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 }
 

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn