Name the data structure used to maintain file identification?

‘inode’, each file has a separate inode and a unique inode number.

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Himanshu

  • Nov 7th, 2006
 

The data structure that is used to maintain the In-Core Inode Information is "Inode Table". This table (logical representation) has the following information abt the file:-

 - type of the file

 - permissions on the link

 - Owner Id

 - Group Id

 - File Size

 - Arrayy of 13 pointers to a file or another entry in the inode table.

 Besides these, the UNIX system maintains 2 other data structures namely -

  1. User File Descriptor Table - A per Process table maintains information of open files by single process

              PK - PID , FileDescriptor

  2. File Table - A Global Table that maintains the information of all the open files.

         PK - FileDescriptor

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