1. A processor implemented method of emulating a virtual boundary of a file system for data management at a fileset granularity, wherein the file includes a file ID and a file system ID, the method comprising: dynamically assigning a fileset ID associated with a file in the file system; defining the fileset as a virtual boundary of the file system; wherein the virtual boundary of the fileset is smaller than, and contained within the file system; and identifying the file by the file ID and the fileset ID rather than by the file ID and the file system ID.