Some possible configurations
are as follows:
??? TAF can automatically reconnect clients back to their original instances for cases
in which the instance failed but the node did not. An automated monitoring system,
such as Oracle Enterprise Manager, can detect instance failure quickly and
restart the instance. The fast-start recovery features in Oracle enable very low
crash recovery times. Users that aren??™t performing heads-down data entry work
can be automatically reconnected by TAF and might never be aware that their
instance failed and was restarted.
??? In simple clusters, TAF can reconnect users to the instance started by simple
hardware failover on the surviving node of a cluster. The reconnection cannot
occur until the alternate node has started Oracle and has performed crash
recovery.
??? When there are two distinct databases, each with a single instance, TAF can
reconnect clients to an instance that provides access to a different database running
in another data center. This clearly requires replication of the relevant data
between the two databases.
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