Browse Prior Art Database

Space Management of UNIX File Systems

IP.com Disclosure Number: IPCOM000105413D
Original Publication Date: 1993-Jul-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Debry, R: AUTHOR [+4]

Abstract

During a transfer of data from an UNIX* client to a UNIX file server a disk full condition or minimum space threshold exceeded may occur, automated spool to tape or optical disk is required.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 89% of the total text.

Space Management of UNIX File Systems

      During a transfer of data from an UNIX* client to a UNIX file
server a disk full condition or minimum space threshold exceeded may
occur, automated spool to tape or optical disk is required.

      Automated space management of a UNIX file system to tape or
optical disk via a specialized UNIX daemon using client/server
methodology (ie Sun's RPC, DCE, or TCP/IP sockets) has been developed
to read and write files on a distributive environment.  When the
server processes a request to write a file, the server will monitor
the amount of free space available on the file system being written
to.  If the amount of free space is less than a known threshold or if
out of space will occur a file will be migrated to tape or optical
disk.  A entry is recorded in the servers inventory indicating that
this file is written to tape or optical disk.  When the file that was
in the process of being written to the server is closed an entry is
made in the Server inventory indicating where the file is on the
server machine (i.e., this file may have been written directly to
tape or optical disk because of it's size).

      When the server process a request to read a file the server
inventory is checked for location of file, if migrated to tape it
would be recalled to disk for processing by the client.

      Because of the distributive architecture of TCP/IP the client
can be on the same node as the server.

      This provides a...