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CHKPNT.DOC -- Changes from V4(113) to V5(116)
October 1981






























COPYRIGHT (C) 1976,1979,1982 BY
DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.


THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND  COPIED
ONLY  IN  ACCORDANCE  WITH  THE  TERMS  OF  SUCH  LICENSE AND WITH THE
INCLUSION OF THE ABOVE COPYRIGHT NOTICE.  THIS SOFTWARE OR  ANY  OTHER
COPIES  THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
OTHER PERSON.  NO TITLE TO AND OWNERSHIP OF  THE  SOFTWARE  IS  HEREBY
TRANSFERRED.

THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE  WITHOUT  NOTICE
AND  SHOULD  NOT  BE  CONSTRUED  AS  A COMMITMENT BY DIGITAL EQUIPMENT
CORPORATION.

DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR  RELIABILITY  OF  ITS
SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.

CPT5.DOC                                                        Page 2


CHKPNT.DOC -- Changes from V4(113) to V5(116)
October 1981



1.0  SUMMARY

CHKPNT has three major functions:

     1.  Compile account statistics on disk space utilization.

     2.  Set the monitor checkpoint interval.

     3.  Copy system-generated accounting data to the accounting file.

CHKPNT version 5(116) runs only on Release 5 of TOPS-20.

CHKPNT is documented in the TOPS-20 Operator's Guide.



2.0  EXTERNAL CHANGES

It is possible for CHKPNT to suffer column overflow while doing a NOUT
for  certain  records.   This error is not fatal, and CHKPNT continues
processing records;  only the data in the overflowing  field  will  be
suspect.   However,  an  annoying  repetition  of  the message "Column
overflow ..." results.  The error reporting mechanism has been changed
such  that the column overflow message is typed only once, followed by
the number of occurrences detected.



3.0  KNOWN BUGS AND DEFICIENCIES

There are no known bugs or deficiencies.



4.0  INSTALLATION INSTRUCTIONS


4.1  Files Needed to Run CHKPNT

CHKPNT consists of one file, CHKPNT.EXE

CPT5.DOC                                                        Page 3


4.2  Instructions for Loading and Installing CHKPNT

Mount the tape labeled  Installation  Tape  on  MTA0:   and  type  the
following commands:

     SKIP MTA0:5 FILES
     R DUMPER
     TAPE MTA0:
     REWIND
     DENSITY 1600-BPI
     SKIP 1
     RESTORE <*>CHKPNT.EXE (TO) SYS:*.*.-1
     REWIND


4.3  Files Needed to Build CHKPNT

CHKPNT is built from the following file:

     CHKPNT.MAC

In addition, the following files must be on SYS:

     MACREL.REL
     MACSYM.UNV
     MONSYM.UNV
     ACTSYM.UNV


4.4  Instructions for Building CHKPNT

Mount the tape labeled  Distribution  Tape  on  MTA0:   and  type  the
following commands:

     R DUMPER
     TAPE MTA0:
     REWIND
     DENSITY 1600-BPI
     SKIP 1
     RESTORE <*>*.*.* (TO) <self>*.*.*
     REWIND
     ^C
     SUBMIT CHKPNT.CTL/TIME/UNIQ:0/REST


4.5  Special Considerations

None.

CPT5.DOC                                                        Page 4


5.0  INTERNAL CHANGES

CHKPNT has never correctly calculated the length  of  arbitrary  usage
records,  and  never  copied more than the record header to the output
file.  This has been fixed.



6.0  SUGGESTIONS

None.



[End of CPT5.DOC]