1. MySQL replication & cluster
by Joeri de Bruin
ProcoliX

2. Single vs Multiple
Multiple MySQL servers means that there are more
MySQL services, this will normaly be on more
servers.

3. Why multiple
1. High availability 2. On line backup

4. replication vs cluster

5. Proces
Replication
1. UPDATE on master
2. UPDATE written in Binlog
3. Binlog is read by slave
4. UPDATE on slave
Cluster
1. UPDATE on MySQL
2. UPDATE written to Cluster filesystem

6. Uses
Replication has 1 master and slaves
Cluster can read and write on all nodes

7. Replication quick howto
[mysqld]
server-id=2
master-host=db-
master.mycompany.com
master-port=3306
master-user=gooey
master-password=octopus
Procedure:
1. Configure master and slave
2. Stop MySQL
3. Copy data tot slave
4. Start MySQL on master
5. Start MySQL on slave

8. Cluster quick howto
[MYSQLD] # file "config.ini"
ndbcluster [NDBD DEFAULT]
ndb-connectstring=192.168.0.10 NoOfReplicas= 1
MaxNoOfOrderedIndexes=2500
[MYSQL_CLUSTER] MaxNoOfUniqueHashIndexes=2500
ndb-connectstring=192.168.0.10 MaxNoOfAttributes=4000
Procedure:
Install MySQL-MAX
Configure cluster
Configure MySQL
Start MGM node
Start ndb deamon
Start MySQL

9. MySQL cluster and WebGUI
MySQL cluster uses NDB cluster engine in stead of
MyIsam tables
Alter create.sql to use with MySQL cluster
vi create.sql
:0,$s/TYPE=MyISAM/ENGINE=NDBCLUSTER/g

10. Tips and tricks
Always use the same MySQL version
Use the source: www.mysql.com
Replication:
http://dev.mysql.com/doc/mysql/en/replication.html
Cluster:
http://dev.mysql.com/doc/mysql/en/multi-computer.html