AUXILIARY FILES IN A CONTAINER FILE SYSTEM

A technique for storing support files in a data storage apparatus provides auxiliary files in a container file system. The container file system stores a container file that provides a file-based realization of a data object, such as an entire file system, LUN, or vVOL, for example, and stores one or more auxiliary files in the container file system alongside the container file. Thus, an auxiliary file that supports an application program's operations on a data object resides in the same fault domain with the container file that realizes the data object.