How does RAC One Node compare with traditional cold fail over solutions like HP Serviceguard, IBM HACMP, Sun Cluster and Symantec, and Veritas Cluster Server?

RAC One Node is a better high availability solution than traditional cold fail over solutions. RAC One Node operates in a cluster but only a single instance of the database is running on one node in the cluster. If that database instance has a problem, RAC One Node detects that and can attempt to restart the instance on that node.

If the whole node fails, RAC One Node will detect that and will bring up that database instance on another node in the cluster. Unlike traditional cold failover solutions, Oracle Clusterware will send out notifications (FAN events) to clients to speed reconnection after failover. 3rd-party solutions may simply wait for potentially lengthy timeouts to expire.

RAC One Node goes beyond the traditional cold fail over functionality by offering administrators the ability to proactively migrate instances from one node in the cluster to another. For example, lets say you wanted to do an upgrade of the operating system on the node that the RAC One Node database is ... more.

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