Browse Prior Art Database

Dynamic Reconfiguration in a Modular Computer System

IP.com Disclosure Number: IPCOM000149030D
Original Publication Date: 1971-Jun-30
Included in the Prior Art Database: 2007-Mar-30

Publishing Venue

Software Patent Institute

Related People

Schell, Roger R.: AUTHOR [+2]

Abstract

UNCLASSIFIED Security Classification DOCUMENT CONTROL DATA& RLD

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 2% of the total text.

Page 1 of 384

UNCLASSIFIED
Security Classification

DOCUMENT CONTROL DATA& - RLD

1. ORIGINATING ACTIVITY (Corporate author)

Massachusetts Institute of Technology

a Modular Computer System

I Dynamic Reconfiguration in

Ph.D. Thesis, Department of Electrical Engineering, May 1971

5. AUTHOR(S1 (Last name, first name, initial)

4. DESCRIPTIVE NOTES (Type of report end inclusive dates)

Schell, Roger R.

I June 1971


6. REPORT D A T E 17a. T O T A L NO. O F PAGES
I 1

Be. CONTRACT OR GRANT N o . 19a. ORIGINATOR'S REPORT NUMBER(SI

I

76. NO. O F R E F S

I Nonr-4102 (01)

I

I MAC TR-86 (THESIS)

b. PROJECT NO.

Sb. OTHER R E P O R T NO(S) (Any other numbers that may be assigned this report)

I

d.

10. AVAILABILITY/LIMITATION NOTICES

                                       Advanced Research Projects Agency
None 3D-.2

   00 Pentagon
Washington, D.C. 20301

13. ABSTRACT

This thesis presents an orderly design approach for dynamically changing the configura
tion of constituent physical units in a modular computer system. Dynamic reconfigura-
tion contributes to high system availability by a]-lowing preventive maintenance,
development of new operating systems, and changes in system capacity on a non-
interference basis. The design presented includes the operating system primitives
and hardware architecture for adding and removing any (primary or secondary) storage
module and associated processing modules while the system is running. Reconfiguration
is externally initiated by a simple request from a human operator and is accomplished
automatically without disruption to users of the system. This design allows the
modules in an installation to be partitioned into separate noninterfering systems.

The viability of the design approach has been demonstrated by employing it for a
practical implementation of processor and primary memory dynamic reconfiguration
in the Multics system at M.I.T.

1 1 . SUPPLEMENTARY N O T E S 12. SPONSORING MILITARY ACTIVITY

14. KEY WORDS

Modular Computer Systems Computer Utility Multics Multiplexed Computers
Dynamic Reconfiguration Operating Systems

 UNCLASSIFIED
Security Classification

[This page contains 1 picture or other non-text object]

Page 2 of 384

[This page contains 1 picture or other non-text object]

Page 3 of 384

DYNAMIC RECONFIGURATION IN A MODULAR. COMPUTER SYSTEM
Roger R. Schell

June 1971

           PROJECT MAC
MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Cambridge Massachusetts 02139

[This page contains 1 picture or other non-text object]

Page 4 of 384

      % especially express my appreciation t o my thesis supervisor, Professor Jerome H, Saltzer, for the substantial time and effort he spent supervising Chis thesis, and in particular for iais helpful eoments w:aich greatly improved the presentation of this thesis,

T~~anks
are also due my readers, Professors F, J, Corbat6

and Re Pl, Fano, for their review and comments,

    Appreciation is extended to Project IlAC for making the !iultics system available...