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About Repository Patch Files

A Repository patch file, like an archive file, consists of exported objects. The difference between a patch file (SPF file) and an archive file (SIF file) is that the patch file contains two versions of each object, one from the preupgrade source repository and one from the postupgrade. An archive file contains only one version of each object, and all objects are from the same repository.

Figure 22 shows how pre and postupgrade versions of an object are paired in the patch file, and then used when applying the patch to the target repository.

Figure 22.  How a Patch Works

The pair of pre- and post-release objects in the patch file provide before and after snapshots of the object. The patch application process considers both when determining what changes to make to the target repository.

Related Topics

Creating Repository Patch Files

Applying Repository Patch Files