Deploying an Oracle RAC 10g Release 2 database with ASM on a Red Hat Enterprise Linux 5 or a SUSE Linux Enterprise Server 10 with an IBM DS3200 Storage Subsystem

IT departments that already run an Oracle RAC 10g Release 2 database with ASM on Red Hat 5 might consider upgrading their storage subsystem to an IBM storage subsystem.

Any proposed upgrade raises the question of interoperability with the existing system. Using a test setup, this document shows that you can successfully install Oracle 10g Clusterware and the Oracle 10g database application with an IBM DS3200 storage subsystem.

This document shows how to overcome the following key obstacles to a successful installation:

• Incorrect configuration of Red Hat 5 kernel parameters for Oracle. The key challenge of this configuration is tuning the Oracle kernel parameters on the hosts. Kernel parameters must fit the needs of your database environment to achieve the best performance optimization. Only certain minimum requirements for kernel tuning must be met to install correctly.

Theoretically, you could wait to adjust the kernel parameters until after installation. However, kernel tuning needs to be understood in the beginning as much as possible. Kernel turning’s biggest impact is on performance.

• Incorrect file permissions for the various components. When the Oracle Cluster Register OCR file permissions are set incorrectly, installation of Oracle Cluster might fail, or even if the installation does complete, Clusterware might not run correctly. The same rules apply to the voting disk drives.

• Not getting disk drive access to the storage subsystem from all shared devices. If you do not map all shared logical drives to the host group, not all hosts see the correct LUNs. Also, if the Host Bus Adapter (HBA) driver that you installed is not compatible with the BIOS and firmware or does not use the recommended settings, the host might have problems detecting the LUNs or might experience unexpected.

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