Book Image

MariaDB High Performance

By : Pierre Mavro
Book Image

MariaDB High Performance

By: Pierre Mavro

Overview of this book

Table of Contents (18 chapters)
MariaDB High Performance
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

How Galera Cluster works


The following are some advantages of Galera Cluster:

  • True multimaster: It can read and write to any node at any time

  • Synchronous replication: There is no slave lag and no data is lost at node crash

  • Consistent data: All nodes have the same state (same data exists between nodes at a point in time)

  • Multithreaded slave: This enables better performance with any workload

  • No need of an HA Cluster for management: There are no master-slave failover operations (such as Pacemaker, PCR, and so on)

  • Hot standby: There is no downtime during failover

  • Transparent to applications: No specific drivers or application changes are required

  • No read and write splitting needed: There is no need to split the read and write requests

  • WAN: Galera Cluster supports WAN replication

Galera Cluster needs at least three nodes to work properly (because of the notion of quorum, election, and so on). You can also work with a two-node cluster, but you will need an arbiter (hence three nodes). The arbiter...