Book Image

IBM InfoSphere Replication Server and Data Event Publisher

By : Pav Kumar-Chatterjee, Pav Kumar Chatterjee
Book Image

IBM InfoSphere Replication Server and Data Event Publisher

By: Pav Kumar-Chatterjee, Pav Kumar Chatterjee

Overview of this book

Business planning is no longer just about defining goals, analyzing critical issues, and then creating strategies. You must aid business integration by linking changed-data events in DB2 databases on Linux, UNIX, and Windows with EAI solutions , message brokers, data transformation tools, and more. Investing in this book will save you many hours of work (and heartache) as it guides you around the many potential pitfalls to a successful conclusion. This book will accompany you throughout your Q replication journey. Compiled from many of author's successful projects, the book will bring you some of the best practices to implement your project smoothly and within time scales. The book has in-depth coverage of Event Publisher, which publishes changed-data events that can run updated data into crucial applications, assisting your business integration processes. Event Publisher also eliminates the hand coding typically required to detect DB2 data changes that are made by operational applications. We start with a brief discussion on what replication is and the Q replication release currently available in the market. We then go on to explore the world of Q replication in more depth. The latter chapters cover all the Q replication components and then talk about the different layers that need to be implemented—the DB2 database layer, the WebSphere MQ layer, and the Q replication layer. We conclude with a chapter on how to troubleshoot a problem. The Appendix (available online) demonstrates the implementation of 13 Q replication scenarios with step-by-step instructions.
Table of Contents (12 chapters)
IBM InfoSphere Replication Server and Data Event Publisher
Credits
About the Author
About the Reviewer
Preface

Q Capture administration


Let's quickly recap the major tasks that Q Capture performs:

  • To "read" the DB2 log, and put committed transactions onto its Send Queue

  • To keep track of what has been processed

  • Initiates pruning of the control tables

Starting Q Capture

The asnqcap command is used to start Q Capture and has numerous parameters, discussed next. To issue the command we need to be either DBADM or SYSADM for the database and have write authority on the directory where Q Capture will write its log (c:\temp in our scenario). The command is:

$ asnqcap [<parameter>=<value> ...]

The parameters are:

Parameter

Description

ADD_PARTITION=Y|N

Determines whether Q Capture starts reading the log file for partitions that were added since the last time Q Capture was restarted.

AUTOSTOP=Y|N

Terminate Q Capture after hitting end of log.

CAPTURE_PATH=

Location of Q Capture log files.

CAPTURE_SCHEMA=

Name of schema used to identify Q Capture.

CAPTURE_SERVER=

Name of the Q Capture control...