Method, system and program products for operationally backing out components of a cluster through emulation

This invention relates, in general, to backing out components in a computing environment, and in particular, to backing out a component operating in a compatibility mode while maintaining availability of the computing environment. A backing out capability backs out a component of a computing environment, while maintaining the availability of the computing environment. In particular, a component of the computing environment which is associated with at least a portion of a unit of work is backed out from one version to another version. In addition, the backed out component is capable of emulating the other version.