Using Serviceguard Extension for RAC, 5th Edition, June 2007

Serviceguard Configuration for Oracle 9i RAC

Planning Database Storage

Chapter 3 133

NOTE Mixing files between CFS database files and raw volumes is allowable,

but not recommended. RAC datafiles on CFS requires Oracle Disk

Manager (ODM).

Using Single CFS Home or Local Home

With a single CFS home, the software installs once and all the files are

visible on all nodes. Serviceguard cluster services needs to be up for the

CFS home to be accessible. For Oracle RAC, some files are still local

(/etc/oratab, /var/opt/oracle/, /usr/local/bin/).

With a local file system home, the software is installed and copied to

every node’s local file system. Serviceguard cluster services does not

need to be up for the local file system to be accessible. There would be

multiple homes for Oracle.

Considerations on using CFS for RAC datafiles and Server

Management Storage (SRVM)

Use the following list when considering to use CFS for database storage:

• Single file system view

— Simpler setup for archive recovery since archive area is visible by

all nodes

• Oracle create database files

• Online changes (OMF - Oracle Managed Files) within CFS

• Better manageability

• Manual intervention when modifying volumes, DGs, disks

• Requires the SGeRAC and CFS software

3 Local FS CFS

4 Local FS Raw (SLVM or CVM)

Table 3-1 RAC Software, Archive, Datafiles, SRVM

Configuration

RAC Software,