# Cascade DataHub™

### Version 4.0

Jan 08, 2003

A memory resident real-time database that acts as a hub, providing fast and efficient concentration and distribution of data for QNX and Linux applications.

| With version 4.0, Cogent software now includes source-code compatibility among the QNX 4, QNX 6 and Linux operating systems, a reorganized and expanded API, and other improvements. Version 4.0 of Cogent's tools will not interoperate with version 3 or older. This documentation has been edited and reorganized to reflect those changes. For documentation of Cogent software version 3.x, please contact Cogent Real-Time Systems, Inc.

Go to the Cogent Web Site.

Copyright © 1995-2002 by Cogent Real-Time Systems, Inc.

List of Tables
2-1. Memory Usage

List of Figures
2-1. The Cascade DataHub Viewer in Console Mode
2-2. The Cascade DataHub Viewer for QNX Photon
2-3. The Cascade DataHub Viewer for X Windows
2-4. Exceptions and Echoes
2-5. Asynchronous Messages
3-1. Synchronous data transmission
3-2. Asynchronous data transmission
3-3. Cascade DataHub Data Transmission

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Copyright 1995-2002 by Cogent Real-Time Systems, Inc.