DSE Multi-Instance architecture  

Multiple DataStax Enterprise nodes are installed in a cluster on a single physical server.

DSE Multi-Instance enables multiple DataStax Enterprise nodes to exist on a single physical server. Multiple DataStax Enterprise nodes on large hardware effectively leverages the computing resources of a single server to reduce hardware costs.

To achieve the best performance, DataStax recommends:
  • All DSE Multi-Instance nodes on a single physical host share the same Cassandra rack to avoid replica placement problems.

    If you are not using the Cassandra rack feature, you must configure racks manually to ensure that the DSE Multi-Instance nodes on the same host machine do not encounter replica placement problems.

  • Ensuring that DSE Multi-instance nodes do not share a single physical disk.

    For example, for two DSE Multi-Instance nodes do not configure a server with a single disk. Instead, configure the server with at least two disks so that each node can have its own exclusive storage device.

DataStax Enterprise is installed in a single location on the host machine with: The following image shows three DataStax Enterprise nodes on a single host machine.


This image shows three nodes on a single host machine. A JVM runs each node. Multiple DataStax Enterprise nodes exist in a single host machine.