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Research IT :: Cluster :: High Availability


High Availability Cluster (HA Cluster)






HA clusters prevent outages of business critical applications. Essentially, there are two approaches to high availability:


  • Active/active cluster
  • Active/passive cluster

The diagram above illustrates the concept of an active/passive cluster.


  • One computer acts as an active node. All tasks - including reception, sending and storage of data - are handled by this computer.
  • The other computer assumes the role of the passive node. During normal operation, it only checks if the active node is running and providing all services.
  • The two nodes use a common data storage (shared data active/passive). This way, the passive node has always access to the same data as the active node. Any changes made to the data are available instantly.
  • In the event of a failure of the active node, the passive node takes over the services of the active node. Operations are resumed from the exact same state that the active node failed.

anterio plans and integrates customized high availability solutions for you. Please contact us at any time! Thank you.