Overview of Ozone Manager in High Availability

Configuring High Availability (HA) for the Ozone Manager (OM) enables you to run redundant Ozone Managers on your Ozone cluster and prevents the occurrence of a single point of failure in the cluster from the perspective of namespace management. In addition, Ozone Manager HA ensures continued interactions with the client applications for read and write operations.

Ozone Manager HA involves a leader OM that handles read and write requests from the client applications, and at least two follower OMs, one of which can take over as the leader in situations such as the following:
  • Unplanned events such as a crash involving the node that contains the leader OM.
  • Planned events such as a hardware or software upgrade on the node that contains the leader OM.