Relatively small and slowly changing. Managers keep track of cache consistency information and disk block pointers. The IMap Maps a file ID to the disk address of the file's index node. The IMap points to index nodes which resemble FFS inodes. File Directories Maps file names to file IDs.
Directories are regular files.
New files managed by the client that created the file. Necessity if number of servers is high. Dynamic reconfiguration achieved using obsolete groups. Cleaner cleans up obsolete groups. Read Path Directory Lookup yields file index number.