Yum currently consists of two separate components. One component of yum must be run on each repository the yum client seeks to use. Yum-arch is the tool that ``yummifies'' a repository, preparing it so that the yum client tool can easily and efficiently obtain the header information it requires to function. Yum-arch has a variety of debugging, informational, and security switches that are primarily of use to systems persons setting up repository and are well-documented in its man page.