O'Reilly logo

IBM WebSphere: Deployment and Advanced Configuration by Roland Barcia, Keys Botzum, Tom Alcott, Bill Hines

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Distributed Replication Service

As implied by its name, the Distributed Replication Service (DRS)[9] is a runtime component in WAS-ND that is used to replicate data among distributed processes in a WAS cell. In WAS-ND V5, DRS can either be used as a failover mechanism for HTTP Session objects, as discussed in Chapter 22, “Session Management,” or to replicate dynacache entries, as described in Chapter 19.

[9] DRS is sometimes also referred to as WebSphere Internal Messaging.

DRS Concepts

Before we discuss configuring DRS and topology options, we need to outline the various components that comprise DRS as well as some terms relating to its use.

The first term is replica. A replica is nothing more than an in-memory copy of data. If one server updates ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required