2.2.3 Applying a Patch on Multiple Hosts Using OPatchAuto

After you obtain the necessary patches, use the opatchauto apply —analyze command to verify prerequisites, and then use opatchauto apply —topology to apply a patch on multiple hosts. If needed, you can use opatchauto rollback to roll back the application of a patch.

Note:

Before applying a patch on multiple hosts, ensure that you have created a topology file using Fusion Middleware Composer. You must supply this file on the command line using the -topology option when you run OPatchAuto. OPatchAuto uses this file to obtain information from your environment to identify the configuration that you want to patch. For an example on how to create a topology file, see Building A Topology Using Fusion Middleware Composer.

Patching a multi-host environment with OPatchAuto involves the following tasks:

• Verifying the Prerequisites for Applying a Patch on Multiple Hosts
  To ensure successful patching, use the opatchauto apply —analyze command to check for any prerequisites. For multi-host patching, you must provide the Fusion Middleware Composer topology file using the -topology argument.
• Applying a Patch on Multiple Hosts Using the Apply Command
  To apply a patch on multiple hosts, use the opatchauto apply command. This is the same command as opatchauto apply —analyze, except you remove the -analyze argument when you are ready to apply the patch.
• Rolling Back a Patch You Have Applied on Multiple Hosts
  If you apply a patch and the results are not satisfactory, use the opatchauto rollback command to roll back the application of a patch. This is the same command as opatchauto rollback –analyze, except you remove the -analyze argument when you are ready to roll back the patch.