Oracle, 11g Real Application Cluster (RAC) is
a clustered version of the Oracle database with a comprehensive approach of
high availability and resilience of data. These two main drivers make RAC a
great temptation for the businesses. With the worldwide collaboration and 24*7 access
of data the availability is measured in terms of currency not just in
convenience and time.The combination of Oracle
11g RAC infrastructure and good database administrator (DBA) can deliver uninterrupted data center operations for the diversified
kind of applications.
How Oracle 11g RAC can be beneficial for
the enterprises?
In
the Oracle11g RAC stack the servers
run independently and the failure of one server does not affect the operations
on the other server. This lays the foundation for different characteristics offered
by RAC, defined as follows:
·
High availability–Due
to any kind of failure either the hardware or the software, the services remain
uninterrupted. The redundant components enable the failover support and keep
business disruption away at the time of failure in any of the servers.
·
Reliability- Oracle RAC’sare
known for reliability. They ensure to deliver data and continue operations by
keeping the cluster open and active even if the failure occurs at a single
point. The internal bridging between the nodes, networking, and locking
mechanism ensure the data resides logically connected.
·
Error Detectionand recoverability– Oracle Clusterware automatically monitors Oracle RAC databases.
The databases include the features to support recovery. This feature allows a
cluster to identify the failure of any server (instance) and start the recovery
process automatically.
·
Continuous Operations – No downtime and no delay in availability of data/services are
key components for any business success. The clusters are capable enough to
support the accessibility of data through applications at all time. This
feature is highly demanded by business operations.
·
Scalability–RAC database provides excellent scalable options.
As the need arises, the nodes as additional memory resources can be added to accommodate
demand. This enhances the storage capability and the computing power to achieve
increased
performance.
Oracle
11g RAC incorporates above mentioned features and thus becomes an
optimal choice for businesses to maximize the benefits despite failures.
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