Percona XtraDB Cluster is a High Availability and Scalability Solution for MySQL Users and is Based on Percona Server 5.5/5.6

Percona XtraDB Cluster provides:
- Synchronous replication. A transaction is either committed on all nodes or none.
- Multi-master replication. You can write to any node.
- Parallel applying events on slave. Real “parallel replication”.
- Automatic node provisioning.
- Data consistency. No more unsynchronized slaves.

Percona XtraDB Cluster is fully compatible with MySQL or Percona Server as follows:
- Data compatibility. Percona XtraDB Cluster works with databases created in MySQL / Percona Server.
- Application compatibility. There is no or minimal application changes required to start work with Percona XtraDB Cluster.

Percona XtraDB Cluster is based on Percona Server with XtraDB and includes Write Set REPlication patches. It uses the Galera library, version 2.x/3.x, a generic Synchronous Multi-Master replication plugin for transactional applications.