Typical HA Cluster Lifecycle

• Failover Clusters

  • A single instance of the application runs on one cluster member at any point in time.
  • Cluster members monitor each other’s health and take over running the application in the event of failure.

• Parallel HA Clusters

  • Application runs simultaneously on all cluster members for performance boost; requires application customization.

• Single System Image

  • Appears to be a single system. (Unified PID space, filesystem namespace). Typically requires no application customization.

• The lean and nimble takeover.

Notes: