Oracle Tips by Burleson

10g Grid Computing with RAC
Real Application Cluster Architecture

Hot Swap Power

In its simplest form, two power supplies, each capable of providing power for the whole system, should be built into the server to share the load. When one of the supplies fails, the surviving supply keeps the server running. The facility of UPS is another most essential requirement.

Hot Swap Fans

A cooling fan failure will not bring a system down if it can be hot-swapped transparently. Most cooling-related issues are external to the system, such as keeping the computer room temperature stable below the required levels. High temperatures and temperature fluctuations are a form of stress to electronic components.

Partitions within the Server

As an example, the Sun Enterprise 10K Server includes Dynamic System Domains, which allow a single machine to be divided into logical partitions, with each partition totally electrically isolated from the others.

The features mentioned above, as well as others, help maintain redundancy levels, which indirectly avoids server down time and service disruption to the application user.

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