Introduction to High-Availability Clusters On Linux And Other Systems

The Oracle 10 database server (also known as RAC - 'Real Applications Cluster') - supports both active-passive and active-active configurations.
Can run on top of Oracle's OCFS shared file-system (which is now part of the Linux kernel).
If you run an Oracle database - you usually don't use the machine for other things - so you don't need an extra HA cluster software.

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