File Systems

File Systems

1. Common Operations

   • Create
   • Read
   • Update
   • Open
   • Close
   • Copy
   • Rename
   • Remove
   • Delete

2. File Management Systems

   • Manage permissions for files
   • Allocate space for each file on the disk
     • Hashing algorithms etc.
   • Keep track of a tree of addresses that point to each file

3. Limitations

   • Data duplication
     • With no SSoT for the data, the entire record has to be duplicated if it needs to be referred to in different places.
   • Data dependence
     • Each program may use its own file format, or rely on language specific constructs to store it in certain ways. This reduces the likelihood that the data can't be reused or accessed by other applications.