||Oracle Tips by Burleson
Chapter 1 Oracle 10g Grid Computing
Oracle RAC is a Parallel Database server which
is based on the shared disk model. Shared Disk is accessed by
multiple nodes in the cluster configuration.
Oracle RAC database is an aggregation of Oracle
Database Instances, thereby enhancing database computing power. This
architecture provides a truly scalable and highly available
framework to meet and support complex and large databases needed for
the critical business and scientific operations. Oracle database
instance is an accumulation of memory structures.
Every one is after the CPU cycles, or more
appropriately the idle CPU cycles. In addition, the CPU cycles are
available in the servers, which are under-utilized. For processing a
large problem in a fairly small amount of time, you need more CPU
cycles. The availability of such resources concurrently (in parallel
mode) helps to compute much faster than a single server and its
The next important component is the
availability of the ‘data’. Where is your data to process and then
provide you with the results? The ‘data’ is stored in organized and
structured databases. While storage systems physically store the
data blocks on media devices (disk drives) in the storage arrays,
provided mostly notably by, EMC, Hitachi and IBM, the servers fetch
and process in the name of relational databases.
For more information, see the book
Oracle 11g Grid
and Real Application Clusters - 30% off if you buy
it directly from Rampant TechPress .
Written by top Oracle
experts, this RAC book has a complete online code depot with ready to
use RAC scripts.
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