UMA Data Capture Interface (DCI)
Copyright © 1997 The Open Group


CAE Specification
Systems Management: UMA Specification, Part 3 - Data Capture Interface (DCI)
X/Open Document Number: C427
ISBN: ISBN 1-85912-117-9

©January 1997, The Open Group All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the copyright owners.

Portions of this document are derived from a document produced by UNIX International which contained the following copyright notice:

Copyright © 1996, Computer Measurement Group
Permission to use, copy, modify, and distribute this documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appears in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name Computer Measurement Group (CMG) not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. CMG makes no representations about the suitability of this documentation for any purpose. It is provided "as is" without express or implied warranty.

Any comments relating to the material contained in this document may be submitted to The Open Group at:

The Open Group
Apex Plaza
Forbury Road
Berkshire, RG1 1AX
United Kingdom
or by electronic mail to:


This Document
This document is a CAE Specification. It defines the requirements for a programming interface for the lowest layer in the Universal Measurement Architecture (UMA) - the interface between the data capture layer and the measurement control layer. It includes sufficient background for the reader to understand the problem being solved and the source of the programming interface requirements, as well as defining an interface (the DCI) which meets these requirements.

There are two associated UMA specifications which along with the DCI specification define the UMA system:

The UMA Guide (see Part 1 of this specification) reviews the issues surrounding performance measurement in Open Systems, describes the general UMA architecture, and discusses user considerations in adopting the UMA.

The target audience for this document is both system designers, who need to implement this interface, and performance professionals, who need to understand how this interface can be used.


UNIX® is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company Limited.

X/Open® is a registered trademark, and the "X" device is a trademark, of X/Open Company Limited.


This specification was developed by the Performance Management Working Group (PMWG). The PMWG was originally part of UNIX International, and is now part of the Computer Measurement Group.

the Open Group gratefully acknowledges the work of the PMWG in the development of this specification and in the review process for this publication.

Major contributors to the Data Capture Interface specification include:

Sara Abraham Amdahl Corporation Peter Benoit Digital Equipment Corp.
Robert Berry§ IBM Corporation Niels Christiansen IBM Corporation
Paul Curtis Hitachi Computer Products (America), Inc. Paul Douglas Digital Equipment Corp.
Janice Dumont AT&T Bell Laboratories Mark Feldman Sequent Computer Systems, Inc.
Ken Gartner Hitachi Computer Products (America), Inc. Javad Habibi Amdahl Corporation
Suzanne John IBM Corporation Bill Laurune Digital Equipment Corp.
Jee-Fung Pang Digital Equipment Corp. David Potter Open Systems Performance, Inc.
Jim Van Sciver§§ Open Software Foundation Jaap Vermeulen Sequent Computer Systems, Inc.
Ping Wang Open Software Foundation    

Participants who have made contributions to the process of developing these specifications are listed below along with their corporate affiliation at the time of their contribution. Our sincere apologies to anyone whom we may have missed.

Subhash Agrawal BGS Systems Barrie Archer ICL
Tom Beretvas IBM Corporation Wolfgang Blau Tandem Computers, Inc.
Jim Busse NCR Corporation David Butchart Digital Equipment Corp.
David Chadwick Performance Awareness Corp. Ram Chelluri AT&T Global Information Solutions
Danny Chen AT&T Bell Laboratories Ansgar Erlenkoetter Tandem Computers, Inc.
Paul Farr Aim Technology Jerome Feder UNIX System Laboratories
Thierry Fevrier Hewlett-Packard Lewis T. Flynn Amdahl Corporation
Tony Gaseor AT&T Bell Laboratories Joseph Glenski Cray Research, Inc.
Dave Glover Hewlett-Packard Jay Goldberg UNIX System Laboratories
William Hidden Open Software Foundation Liz Hookway NCR Corporation
John Howell Amdahl Corporation Ken Huffman Hewlett-Packard
Mario Jauvin Bell Northern Research Chester John IBM Corporation
Suzanne John IBM Corporation Rebecca Koskela Cray Research, Inc.
Ted Lehr IBM Corporation Greg Mansfield Instrumental
Shane McCarron UNIX International Michael Meissner Open Software Foundation
Marge Momberger IBM Corporation Bernice Moy Open Software Foundation
Henry Newman Instrumental James Pitcairn-Hill Open Software Foundation
Melur K. Raghuraman Digital Equipment Corp. O. T. Satyanarayanan Amdahl Corporation
Yefim Somin BGS Systems Jim Richard Amdahl Corporation
Steve Sonnenberg Landmark Systems Douglas R. Souders UNIX System Laboratories
Leon Traister Amdahl Corporation Michael Wallulis Digital Equipment Corp.
Steve Whitney Boeing Computer Services Elizabeth Williams Super Computer Research
Willie Williams Open Software Foundation Neal Wyse Sequent Computer Systems, Inc.
Seung Yoo Amdahl Corporation    

Referenced Documents

The following documents are referenced in this guide:


CAE Specification, January 1997 - Systems Management: UMA Data Pool Definitions, Part 4 of "Universal Measurement Architecture (UMA)" CAE Specification (ISBN 1-85912-117-9, C427).


CAE Specification, January 1997 - Systems Management: UMA Measurement Layer Interface, Part 2 of "Universal Measurement Architecture (UMA)" CAE Specification (ISBN 1-85912-117-9, C427).


Guide, December 1994, Systems Management: Guide to the Universal Measurement Architecture (ISBN 1-85912-073-3, G414).



Past Editor

Why not acquire a nicely bound hard copy?
Click here to return to the publication details or order a copy of this publication.

Contents Next section Index