End Google Ads 201810 - BS.net 01 --> MySQL Cluster is a write-scalable, real-time, ACID-compliant transactional database, combining 99.999% availability with the low TCO of open source. The purpose of this guide is to enable you to efficiently evaluate the MySQL Cluster database and determine if it is the right choice for your application, whether as part of a new project or an upgrade to an existing service.