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 Apply administration


Let's recap the major tasks that Q Apply performs:

  • Realizes that a Q subscription is ready to be processed

  • Performs a full refresh of the target table (if specified)

  • Replicates new changes from its Receive Queues to the target tables

Starting Q Apply

The asnqapp command is used to start Q Apply and has numerous parameters, which are discussed next. To start Q Apply we need to be either DBADM or SYSADM and have write authority on the directory where Q Apply will write its log (c:\temp in our scenario). If we had specified that Q Apply should do an automatic load, then Q Apply needs SELECT authority on the source tables. The command is:

asnqapp [<parameter>=<value> ...]

The parameters are shown next (with corresponding column names in the IBMQREP_APPLYPARMS table shown in brackets after each parameter):

Parameter

Description

APPLY_PATH=

Location of Q Apply work files (APPLY_PATH).

APPLY_SCHEMA=ASN

Name of schema used to identify Q Apply.

APPLY_SERVER=DB2DBDFT...