After the previous MySQL Master-Master Replication, we recommended to add slaves to Masters, to reduce load on the masters.

In this article we will describe how add slave to one of our masters. You can continue to add slave(s) to another master as the this process.


We will continue the previous post, and assume we have two masters - Server A and Server B, and we will add Server C as slave for Server A.

We are using AMI (Amazon EC2) distribution, but you can use your favor Linux distribution.

Lastly we moved our website to Amazon and after configure Joomla, Nginx and MySQL, we received “Error displaying the error page: Application Instantiation Error” from Joomla.

One of our expertise is to give our clients high-availability products. In many solutions we are implementing different types of replication.

Our favor replication is master-master or active-active, which give the product stability and long-term life-cycle. MySQL can implement it easily, and this blog post come to give simple quick-start guide to beginners and advanced MySQL users


MySQL master-master implemented as Master-Slave in dual-way, means every master think the other is slave and opposite. We will demonstrate 2 servers of replication but you can do it with 3 or more, in star topology. In addition, each master can have one or more slaves to scale reads (very recommended on master-master). 

We will implement the master-master in Amazon (AWS EC2) environment with AMI Linux distribution, but you can do it in your own environment with your favorite distribution.



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