Kronos Scheduling/Monitoring System

Version II.1a,  March 1991
 
Author : Arthur E. Ragosta 
         Advanced Systems Research and Analysis Office
         NASA Ames Research Center

Operating System : VAX VMS

Languages : FORTRAN 77 (95%), DCL (5%)

The KRONOS system provides an environment for scheduling the submission of
batch jobs that is easier and more functional than the SUBMIT/AFTER command. A
detached process is created which wakes up every hour to check a data base for
jobs that should be run.  Jobs may be scheduled to run at a given time, on a
given day of the week, on a given day of the month, on a given week day of the
month, on a given day from the end of the month, every day, every hour, on a
given day of the year, on week days only, etc.  Jobs can be run based on the
value of system logicals and system service item codes.  A user-friendly
interface program is provided to maintain the data base.  A variety of useful
example jobs are provided to demonstrate the use of KRONOS; included are System
Management, Security, Accounting, and Performance Monitoring jobs.

Complete sources are included.  Documentation on magnetic media.

Changes since last release: 
- The documentation has been improved.
- The startup procedure now verifies that a copy of Kronos isn't already
running.  The logical name definitions have been moved into the startup
procedure.
- The sample jobs have been cleaned up and generalized.  SPRING_FORWARD and
FALL_BACK have been added.
- The calendar file capability has been added to specify one-time only jobs
and holidays.  The NOHOLIDAY qualifier of the ON clause has been added to
support this capability.
- The FOR clause has been added allowing system users to run jobs in the
context of other (nonprivileged) users.
- The IF NOT condition has been expanded to accept simple values as well as
comparisons.
- The EVERYWEEKDAY keyword has been added to the ON clause.
- The Runnable list command has been added to Kron to list all currently
runnable jobs.  The Calendar add command has been added to support maintenance
of calendar files.
- Several bugs in parsing parameters and passing them to the submitted job have 
been fixed.  
- A bug in translating logical names has been fixed.
- The system has been made more robust, especially the parser.  The system's
response to errors has been made more consistent.

Keywords: System Management-VMS, Scheduling, Security, Resources, Accounting