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Browse Prior Art Database

Checkpoint Record with Control Information

IP.com Disclosure Number: IPCOM000104142D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Schmidt, HU: AUTHOR

Abstract

A checkpoint record is used to indicate to the spooling system the status of the printer facility. This checkpoint facility can be extended by adding printer control information to the checkpoint record which is then written together with the print output to the DASD by the spooling system. As a result, the printer facility is able to retrieve the control information from the spooling system whenever it wishes, even if the system has been abnormally stopped. By adding this information, the performance of the printer facility is increased, as it is no longer necessary for the printer facility to scan through the complete print output for control information after every restart.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Checkpoint Record with Control Information

      A checkpoint record is used to indicate to the spooling system
the status of the printer facility.  This checkpoint facility can be
extended by adding printer control information to the checkpoint
record which is then written together with the print output to the
DASD by the spooling system.  As a result, the printer facility is
able to retrieve the control information from the spooling system
whenever it wishes, even if the system has been abnormally stopped.
By adding this information, the performance of the printer facility
is increased, as it is no longer necessary for the printer facility
to scan through the complete print output for control information
after every restart.

      The control information incorporated into the checkpoint record
may include information which is different for each page or record of
the print output or for each type of printer facility.  It may also
include tracing information specified by the printer facility for
debugging in case of failure.