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Browse Prior Art Database

Method of Shadowing Mainframe Files to a Workstation(s)

IP.com Disclosure Number: IPCOM000103749D
Original Publication Date: 1993-Jan-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 1 page(s) / 48K

Publishing Venue

IBM

Related People

Bergman, SC: AUTHOR [+4]

Abstract

Disclosed in a method of shadowing source files from a mainframe to a workstation(s) so that the workstation applications have up to date source files. Shadowing at specific daily intervals creates a problem of workstation file integrity due to the delay of the shadowing. Another problem of specific daily shadowing is the IO hit on the mainframe required to transfer all the necessary files to the workstation(s). Maintenance of mainframe to workstation shadowing utilities can also be a bother.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 93% of the total text.

Method of Shadowing Mainframe Files to a Workstation(s)

      Disclosed in a method of shadowing source files from a
mainframe to a workstation(s) so that the workstation applications
have up to date source files.  Shadowing at specific daily intervals
creates a problem of workstation file integrity due to the delay of
the shadowing.  Another problem of specific daily shadowing is the IO
hit on the mainframe required to transfer all the necessary files to
the workstation(s).  Maintenance of mainframe to workstation
shadowing utilities can also be a bother.

      The solution requires the use of an event exit on the mainframe
to mail files to a workstation(s) whenever a file is modified.  The
mail header will include information specific to the action on the
file taken on the mainframe.  A mail handler on the workstation(s) is
required to receive the mainframe mail and act on it accordingly.
This includes such operations as: save, delete, rename, update and so
forth.

      A separate workstation program should be written to create (on
any time interval) a list of shadowed files and date stamps to be
compared against the files on the mainframe.  Any file correspondence
problems may be solved by resending another action of file mail
message to the workstation(s).

      This solution keeps the shadow time from the mainframe to the
workstation(s) to a minimum, while being easy to modify and maintain.
It also does not require monitoring or to be reinstate...