|Oracle9i Real Application Clusters Setup and Configuration
Release 2 (9.2)
Part Number A96600-01
This chapter provides an overview of the procedures and components for installing and configuring the Real Application Clusters software. This chapter includes the following topics:
Real Application Clusters software uses all the components of single instance Oracle environments plus cluster database software that facilitates internode communication. This section, with Figure 1-1, briefly describes the process for installing this software.
The Oracle9i Enterprise Edition, which is required for Real Application Clusters, provides single instance database software and the optional software to operate Real Application Clusters databases. Some of the Real Application Clusters-specific components include:
The operating system clusterware contains operating system-dependent (OSD) components that control the operating system and clusterware services required for Real Application Clusters. The OSD's two primary subcomponents are the Cluster Manager (CM) and the Interprocess Communication (IPC) software.
The OSD clusterware installation process varies according to platform. For UNIX operating systems, your vendor provides the OSD clusterware. For Windows NT and Windows 2000 operating systems, use the Oracle Cluster Setup Wizard to install the Oracle OSD clusterware after configuring your logical partitions as described in the online document, Oracle9i Database Installation Guide for Windows.
The Oracle Universal Installer (OUI) provides a graphical user interface for the installation of the Oracle Enterprise Edition software. Figure 1-1 shows the OUI process flow.
When the OUI runs, Oracle Corporation recommends that you select one of the preconfigured databases or use the Database Configuration Assistant (DBCA) interactively to create your cluster database. You can also manually create your database with scripts. If you are not using a cluster file system, then you must have configured shared raw devices before proceeding with database creation.
When you install Real Application Clusters, the installer copies the Oracle software onto the node from which you are running the installer. The OUI then propagates the software onto the other nodes that you have identified as part of your cluster database. You can also use the Installer to deinstall Oracle software.
The OUI can also install the software for the system management tool, Oracle Enterprise Manager (EM), to integrate this tool into your new cluster environment. Or you can install EM onto other client machines outside your cluster as shown in Figure 1-1 (*).
The Oracle Intelligent Agent is installed when you install EM. The Oracle Intelligent Agent must be running on each node that is part of your Real Application Clusters database so that EM can discover and manage the database.
All instances in Real Application Clusters environments share the control file, server parameter file, and all datafiles. These files reside on a shared cluster file system or on shared disks; either of these types of file configurations are accessed by all the cluster database instances. Each instance also has its own discrete set of redo log files. During failures, this arrangement of shared access to redo log files enables surviving instances to perform recovery.
The Real Application Clusters installation process includes four major tasks.
Verify that your system meets the requirements discussed under the following topics before proceeding with installation:
Verify the following hardware and software requirements for each node:
Each node in a cluster requires the following hardware:
Each node in a cluster requires the following software:
To use Oracle Managed Files (OMF), then your platform must support a cluster file system. The OMF feature automatically creates and deletes files that Oracle requires to manage the database.
Oracle9i Database Administrator's Guide for more information about Oracle Managed Files
Interconnects that support Real Application Clusters and Cache Fusion use one of the following protocols:
Real Application Clusters can use any interconnect product that supports these protocols. You can also use other proprietary protocols that are hardware vendor-specific. The interconnect product that you use must be certified by Oracle for your Oracle9i Real Application Clusters hardware platform.
Oracle9i Real Application Clusters Concepts for more information about Cache Fusion
32-bit instances cannot share the same 9.2 database with 64-bit instances. Depending on the platform, for example, 32-bit and 64-bit Oracle9i Real Application Clusters executables cannot be used at the same time within the same cluster domain. This is because some cluster manager implementations may not be able to concurrently handle 32-bit and 64-bit clients.
If you have installed and configured the required hardware and software and you are not using a cluster file system, then proceed to Chapter 2 to configure the shared disks. If you are using a cluster file system, then proceed to Chapter 3.