About FAN Callouts

About FAN Callouts

FAN callouts are server-side executable files that Oracle RAC runs immediately when high availability events occur. A callout is essentially a shell script or precompiled executable written in any programming language. Some examples of how you can use FAN callouts to automate the actions performed when events occur in a cluster configuration are as follows:

  • Starting and stopping server-side applications
  • Relocating low-priority services when high-priority services come online
  • Sending text or numeric messages to pagers
  • Executing shell scripts

callout script for relocating services back to their preferred instances is available on Oracle Technology Network at: http://www.oracle.com/technetwork/database/enterprise-edition/twpracwkldmgmt-132994.pdf


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