Multi-Master on FromDual GmbH

Migrating from MySQL Master-Master Replication to Galera Multi-Master Replication

oli.sennhauser@fromdual.com (Oli Sennhauser) — Fri, 02 Dec 2011 14:48:58 +0000

Introduction

Galera is a synchronous Multi-Master Replication for MySQL. It is therefore in competition with several other MySQL architectures:

Building Galera Replication from Scratch

oli.sennhauser@fromdual.com (Oli Sennhauser) — Sun, 13 Nov 2011 12:29:54 +0000

Introduction

MySQL/Galera synchronous Multi-Master Replication consists of 2 parts:

The wsrep patches for MySQL (codership-mysql) and
the Galera Replication Plugin (galera).

If you do not want to download the prepared binaries you can build it on you own.
First you have to download the native MySQL sources, then patch it with the Galera wsrep patches and compile it. In a second step you have to build the Galera Plugin.

Galera - Synchronous Multi-Master Replication Cluster for MySQL/InnoDB

oli.sennhauser@fromdual.com (Oli Sennhauser) — Fri, 23 Sep 2011 11:07:03 +0000

Galera features

Galera provides the following features:

Synchronous replication
Active/active multi-master topology
Read and write to any cluster node
Automatic membership control, failed nodes drop from the cluster
Automatic node joining
True parallel row level replication
Direct client connections
Drop-in replacement for native MySQL

Galera benefits

Benefits using Galera Replication:

Be cautious when using Virtualized System with your Database

oli.sennhauser@fromdual.com (Oli Sennhauser) — Wed, 08 Jun 2011 15:01:29 +0000

A customer rose a support case with a problem on his Master-Master set-up. The 2^nd Master claims to have a problem:

MySQL Multi-Master – Single-Slave – Replication (Episode 2)

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 13 Oct 2008 16:17:00 +0000

Introduction

One of the features that make MySQL so great is its easy replication set-up. If you are experienced and know-how to do it, it takes you about 15 minutes to set-up a slave. What you have in the end is a replication from one master to one or several slaves. So you can build a top-down data stream pyramid and spread your data on many slaves.

MySQL Multi-Master - Single-Slave - Replication

oli.sennhauser@fromdual.com (Oli Sennhauser) — Thu, 21 Dec 2006 16:39:00 +0000

MySQL provides its replication for High Availability (HA) and for read Scale-out. Generally it is known that in a MySQL replication you can only replicate from one Master to many slaves. In this paper it is shown how a set-up can look like to replicate from two masters to one slave.