From MashZone NextGen 10.2 on, RTBS can be run in clustered high-availability mode. There is no distinction between MashZone NextGen master and slave servers anymore. This means, to achieve high availability, you can now deploy multiple instances of RTBS to form a cluster. Cluster management is implemented using Apache Zookeeper.

Each MashZone NextGen server may connect to an arbitrary RTBS instance in the cluster and receive data from it. In case of an RTBS node failure, MashZone NextGen will automatically and transparently fail over to another alive node. When an RTBS node re-joins the cluster after a node failure, it will restore its state from RTBS' internal HA-Store.