Oracle® Internet Directory Administrator's Guide 10g (9.0.4) Part Number B12118-01 |
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The Directory in an Oracle9i Real Application Clusters Environment, 2 of 6
A computer where an instance resides. It can be part of a Massively Parallel Computing Infrastructure in which it shares disk storage with other nodes. In most cases, a node has its own copy of the operating system.
A set of instances, each typically running on a different node, that coordinate with each other when accessing the shared database on the disk
An operating system-dependent component that discovers and tracks the membership state of nodes by providing a common view of cluster membership across the cluster
A runtime failover for high-availability environments, such as Oracle Real Application Clusters and Oracle Fail Safe, that refers to the failover and re-establishment of application-to-service connections. It allows client applications to automatically reconnect to the database if the connection fails, and optionally resume a SELECT statement that was in progress. This reconnect happens automatically from within the Oracle Call Interface (OCI)
The client notices no connection loss as long as there is one instance left serving the application.
Failover method in which a client connect request is forwarded to another listener if the first listener is not responding. It is enabled by service registration, because the listener knows whether an instance is running before attempting a connection.
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