MongoDB auto sharding

MongoDB has been widely used as a NoSQL Database in recent years. More and more enterprises are trying to use MongoDB instead of the original Database. MongoDB also performs well in clusters, sharding, and replication. I will introduce various MongoDB deployment experiments.

Article 3 MongoDB auto sharding: six parts
1. initialize the file directory
2. Start the shard Node
3. Configure the shard Node
4. Insert a Data Partition Experiment
5. Delete the primary part.
6. Reset the primary part.
 
System Environment Introduction:
 
Ubuntu 12.04. LTS 64bit Server
 
1. initialize the file directory
 
Create directory
Config1, config2, and config3 are configuration nodes.
Shard1, shard2, and shard3 are shard nodes.
 

~ Pwd
/Home/conan/dbs
~ Mkdir config1 config2 config3 shard1 shard2 shard3
Conan @ u1 :~ /Dbs $ ls-l
Drwxrwxr-x 3 conan 4096 May 31 11: 27 config1
Drwxrwxr-x 3 conan 4096 May 31 11: 27 config2
Drwxrwxr-x 3 conan 4096 May 31 11: 27 config3
Drwxrwxr-x 3 conan 4096 May 31 :28 shard1
Drwxrwxr-x 3 conan 4096 May 31 :29 shard2
Drwxrwxr-x 3 conan 4096 May 31 :29 shard3
 

2. Start the shard Node
 

Start the config Node
 
~ 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
 
Start mongos nodes
 
~ 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/ipvs2.log
 
Start the shard Node
 
~ 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
 
View port
 
~ 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. Configure the shard Node
 
Connect to ipvs1 and add shards to mongos:
 
~ 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}
 

Incorrect syntax: (MongoDB2.0.4 does not support this syntax)
 
Mongos> db. runCommand ({addshard: "shard1/localhost: 10001, localhost: 10002", name: "s1", allowLocal: true })
{
"OK": 0,
"Errmsg": "couldn 'tconnect to new shard socket exception [CONNECT_ERROR] for shard1/localhost: 10001, localhost: 10002"
}
 

View part information
 
Mongos> db. runCommand ({listshards: 1 })
{
"Shards ":[
{
"_ Id": "shard0000 ",
"Host": "localhost: 10001"
},
{
"_ Id": "shard0001 ",
"Host": "localhost: 10002"
},
{
"_ Id": "shard0002 ",
"Host": "localhost: 10003"
}
],
"OK": 1
}
 
Enable database sharding: fensme
 
Mongos> db. runCommand ({"enablesharding": "fensme "})
{"OK": 1}
 

Note: Once a database is enabled, mongos places different data sets in the database on different shards. Only a dataset is partitioned. Otherwise, all data in a dataset is placed in one partition.
 
Enable dataset sharding: fensme. users
 
Mongos> db. runCommand ({"shardcollection": "fensme. users", "key": {"_ id": 1, "uid": 1 }})
{"Collectionsharded": "fensme. users", "OK": 1}
 

View shard status
 
Mongos> db. printShardingStatus ()
--- Sharding Status ---
Sharding version :{
"_ Id": 1,
"Version": 3,
"MinCompatibleVersion": 3,
"CurrentVersion": 4,
"ClusterId": ObjectId ("51a8d3287034310ad2f6a94e ")
}
Shards:
{"_ Id": "shard0000", "host": "localhost: 10001 "}
{"_ Id": "shard0001", "host": "localhost: 10002 "}
{"_ Id": "shard0002", "host": "localhost: 10003 "}
Databases:
{"_ Id": "admin", "partitioned": false, "primary": "config "}
{"_ Id": "fensme", "partitioned": true, "primary": "shard0000 "}
Fensme. users
Shard key: {"_ id": 1, "uid": 1}
Chunks:
Shard0000 1
{"_ Id": {"$ minKey": 1}, "uid": {"$ minKey": 1 }}-- >>{ "_ id ": {"$ maxKey": 1}, "uid": {"$ maxKey": 1 }}on: shard0000 {"t": 1, "I": 0}
 
The fensme Database supports shard, the primary shard is shard0000, and the corresponding host is localhost: 10001.

MongoDB details: click here
MongoDB: click here

MongoDB backup and recovery

CentOS compilation and installation of MongoDB

CentOS compilation and installation of php extensions for MongoDB and mongoDB

CentOS 6 install MongoDB and server configuration using yum

Install MongoDB2.4.3 in Ubuntu 13.04

How to create a new database and set in MongoDB

MongoDB beginners must read (both concepts and practices)

MongoDB authoritative Guide (The Definitive Guide) in English [PDF]

1 2 Next Page