Bootstrap to multiple hosts

If clients use only a single bootstrap server, they cannot get an InitialContext if the WAS or Node Agent or Deployment Manager fails. Using multiple bootstrap servers will improve availability, and WebSphere V5.1 provides an easy way to use multiple bootstrap servers in its corbaloc or corbaname. If one of many bootstrap servers is available, clients can still get an InitialContext. Once an InitialContext has been obtained, the application will be workload managed.

However, in WebSphere V5.1, the Node Agent is not workload managed, and you need to clean the naming cache and to retry explicitly if you want to use multiple Node Agents as bootstrap servers. We suggest that you use clustered appserver members for multiple bootstrap servers, since they are workload managed. Unless you use the high availability solution of the Deployment Manager (as described in Chapter 10, Deployment Manager and Node Agent high availability), not use the Deployment Manager as the bootstrap server alone.

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