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MySQL Clustering



MySQL Cluster is a technology for automatically shared database management system. i.e this technology create two or more replicas of the same data base in different nodes.  Basically mysql clustering is asynchronous communication technology.
The basics steps for establish mysql clustering is given below:
Step 1:
 Download supported version of mysql clustering installation zip file from       http://www.mysql.com/downloads/cluster/
Step 2:
  Extract the zip file and copy the contents inside the folder to  c:\Users\user1\mysqlc
Step 3:
Run the command prompt window as administrator role, And execute the following commands for create clustering directories
  
C:\Users\user1> mkdir my_cluster my_cluster\ndb_data my_cluster\mysqld_data my_cluster\conf
C:\Users\user1> mkdir my_cluster\mysqld_data\mysql my_cluster\mysqld_data\ndbinfo my_cluster\mysqld_data\performance_schema
Step 4:
Create configuration files for clustering; here I am using two systems (192.168.168.20,192.168.168.21)
Config.ini
[ndbd default]
noofreplicas=2

[ndbd]
hostname=192.168.168.20
NodeId=4

[ndbd]
hostname=192.168.168.21
NodeId=3

[ndb_mgmd]
NodeId = 102
hostname=192.168.168.20
[ndb_mgmd]
NodeId = 101
hostname=192.168.168.21

[mysqld]
NodeId=52
hostname=192.168.168.20

[mysqld]
NodeId=51
hostname=192.168.168.21


my.cnf  (This file is for the system with IP address 192.168.168.21)

[mysqld]
ndb-nodeid=51
ndbcluster
datadir=c:\\Users\\user1\\my_cluster\\mysqld_data
basedir=c:\\Users\\user1\\mysqlc
port=5000
server-id=51
log-bin

my.cnf  (This file is for the system with IP address 192.168.168.20)

[mysqld]
ndb-nodeid=52
ndbcluster
datadir=c:\\Users\\user1\\my_cluster\\mysqld_data
basedir=c:\\Users\\user1\\mysqlc
port=5000
server-id=52
log-bin

 ** Save both files(config.inf & my.cnf) in the location ‘C:\Users\User1\my_cluster\conf’

Step 5:
Execute the following command for copy the contents from mysqlc to clustering folders
C:\Users\user1>copy mysqlc\data\mysql my_cluster\mysqld_data\mysql
C:\Users\user1>copy mysqlc\data\ndbinfo my_cluster\mysqld_data\ndbinfo
C:\Users\user1>copy mysqlc\data\performance_schema my_cluster\mysqld_data\performance_schema

Note : Execute steps 1-5 in both systems

Step 6:
  Here we start the clustering process. Before that execute the code in both systems
   C:\Users\user1>cd my_cluster

  C:\Users\user1\my_cluster>start /B c:\Users\user1\mysqlc\bin\ndb_mgmd -f conf\config.ini --initial --
     configdir=c:\Users\user1\my_cluster\conf
After that execute the following code in 192.168.168.20

C:\Users\user1\my_cluster>start /B c:\Users\user1\mysqlc\bin\ndbd -c 192.168.168.20:1186

And then execute the following code in 192.168.168.21
C:\Users\user1\my_cluster>start /B c:\Users\user1\mysqlc\bin\ndbd -c 192.168.168.21:1186
For connecting API in between the  systems  execute the following command in both systems.
c:\Users\user1\my_cluster>start /B c:\Users\user1\mysqlc\bin\mysqld --defaults-file=conf\my.cnf

After this execution, we execute the the below command in both systems
 c:\Users\user1\mysqlc\bin\ndb_mgm -e show

then we get the following output


 










Step 7 :
Now the setup is completed, so we can start the mysql command  prompt  as
c:\Users\user1\my_cluster>c:\Users\user1\mysqlc\bin\mysql -h 127.0.0.1 -P5000 -u root
mysql> create database clusterdb;use clusterdb;
mysql> create table simples (id int not null primary key) engine=ndb;
mysql> insert into simples values (1),(2),(3),(4);








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