Efficient search for migration and purge candidates

Abstract From the Canadian patent

A computer system (10, fig. 1) configured to store a plurality of files and a , data file (72, fig. 5), which includes inode (62 fig. 3; fig. 4) and , migration or purge information associated with the files (fig. 5). The computer system searches the data file to identify files that are candidates for migration or purge (100, 102, fig. 8). A plurality of pathnames associated with the files is stored in the data file or a separate data file and the , computer system obtains the pathnames of candidate files from the data file (or separate data file) (350, fig. 13, 106 fig. 8). When candidate files are , identified their inodes are used to look up their pathnames in the plurality of …