x, available at http://oss.oracle.com, can be used
to store both database files and Oracle executables on a common,
shared file system.
Finally, I will assume that the shared disks are accessible via the same node name in the /dev
directory and that each node in the cluster can access the shared disk simultaneously; the ASM
instance on each node will automatically coordinate access to the shared disk.
Operating System Configuration
The first step is to prepare the operating system. Install Oracle Enterprise Linux, and install every
option! The small amount of disk space you might save otherwise is quickly offset when you are
missing a component later and must find the installation CDs to obtain the missing component.
Once everything is installed, be sure to apply all patches from the Oracle Unbreakable Linux
Network to take advantage of all security and performance enhancements, although Oracle 11g
will run as advertised on Red Hat Enterprise Linux versions 4 and 5.
Memory and Disk Requirements
For each node in the cluster, a minimum of 1GB is recommended. The swap space should be at
least twice this value, or 2GB. For a successful installation, there should be at least 400MB free in
the /tmp file system.
The Oracle software itself requires approximately 4GB of disk space, and the default database
files require another 1.5GB; the growth of your database depends, of course, on the applications
you use.
On your shared disk subsystem, you need two special partitions: one for a voting disk and
one for the Oracle Cluster Registry (OCR).
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