FYLE SYSTEMS

FYLE SYSTEMS

1. APPLICATIONS

   • Virtual File Systems
   • Allocation Methods
     • CONTIGUOUS ALLOCATION
     • LINKED ALLOCATION
     • INDEXED ALLOCATION
     • UNIX METHOD:

2. TYPE OF STRUCTURES

   • Simple record structure
   • Complex Structures

3. BLOCKADE

   • packing bytes
     • size
     • registration

4. ATTRIBUTES

   • Name
   • Identifier
   • Type
   • Location
   • Size
   • Protection
   • Time

5. DIRECTORIES

   • keep information
   • basic information file
   • File protection
     • read
     • write
     • execute

6. ACCESS TYPES

   • Sequential Access
     • access from records
   • DIRECT ACCESS
     • useful for disks
     • no restrictions
   • Indexed
     • references to particular elements

7. management - free space

   • BIT VECTOR METHOD
   • FREE LIST METHOD
   • GROUPING METHOD
   • COUNTING METHOD

8. CACHE MECHANISM

   • lower disc visits

9. DISTRIBUTED FILE