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The architectural model you select to deploy your Real Application Clusters application depends on your processing goals. This chapter describes cluster components in more detail. Node Components A node has these main components: ■ ■ ■ ■ central processing unit – The main processing component of a computer that reads from and writes to the computer’s main memory. memory – The component used for programmatic execution and the buffering of data. interconnect – The communication link between the nodes.

It is used by Oracle in a variety of areas including parallel execution and backup. Figure 3–3 illustrates a shared nothing system: Figure 3–3 Non-Uniform Disk Access CPU CPU CPU CPU CPU Memory Memory Memory Memory Memory Disk Disk Disk Disk Disk Cluster Hardware Architecture 3-7 Clusters: Nodes and the Interconnect Advantages of Non-Uniform Disk Access The advantages of using cluster database processing on MPP or non-uniform disk access systems are: ■ The number of nodes is not limited by the disk connection hardware ■ The total disk storage can be large due to the ability to add nodes Clusters: Nodes and the Interconnect As described previously, to operate Real Application Clusters you must use either a uniprocessor, SMP (UMA), or NUMA memory configuration.

The architectural model you select to deploy your Real Application Clusters application depends on your processing goals. This chapter describes cluster components in more detail. Node Components A node has these main components: ■ ■ ■ ■ central processing unit – The main processing component of a computer that reads from and writes to the computer’s main memory. memory – The component used for programmatic execution and the buffering of data. interconnect – The communication link between the nodes.

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