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Enterprises use Information Technology (IT) to gain competitive advantages, reduce
operating costs, enhance communication with customers, and increase management
insight into their business processes. As the use of IT-enabled Services becomes
prevalent, modern enterprises become increasingly dependent on their IT infrastructure
and its continuous availability. Application downtime and unavailability of data directly
translates into lost productivity and revenue, dissatisfied customers, and tarnished
corporate image.
The traditional approach to building a high availability (HA) infrastructure requires
widespread use of redundant and often idle hardware and software resources supplied
by disparate vendors. Besides being very expensive, that approach falls short of service level expectations due to loose integration of components, technological limitations, and
administrative complexities. Oracle addresses these challenges by providing customers
with a comprehensive set of industry-leading high availability technologies that are preintegrated and can be implemented at a minimal cost.
In this paper, we review the common causes of application downtime and discuss how
technologies available in the Oracle Database can help avoid costly downtime and
enable rapid recovery from unplanned failures and also minimize impact from planned
outages. We also highlight new technologies introduced in Oracle Database 11g Release
2 that enable businesses to make their IT infrastructure even more robust and fault
tolerant, maximize their return on investment on high availability infrastructure, and
provide better quality of service to users.
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