126.96.36.199Partial Redeployment of Static FilesWebLogic Server enables you to redeploy selected files in a running application, rather than the entire application at once. This feature is generally used to update static files in a running Web application, such as graphics, static HTML pages, and JSPs. Partial redeployment is available only for applications that are deployed using an exploded archive directory.Partial redeployment of static files does not affect existing clients of the application. WebLogic Server simply replaces the static files for the deployed application, and the updated files are served to clients when requested. See Section 8.7, "Updating Static Files in a Deployed Application".Note:In-place redeployment is the redeployment strategy used in previous versions of WebLogic Server.
Using Production Redeployment to Update ApplicationsRedeploying Applications in a Production Environment8-188.8.131.52Partial Redeployment of Java EE ModulesPartial redeployment also enables you to redeploy a single module or subset of modules in a deployed Enterprise application. Again, partial deployment is supported only for applications that are deployed using an exploded archive directory.Note that redeployment for modules in an Enterprise application uses the in-place redeployment strategy, which does not guarantee uninterrupted client access to the module. For this reason, you should ensure that partial redeployment of Java EE modules in an EAR takes place only during scheduled application downtime, or when it is not critical to preserve client access to the application. See Section 8.6, "Using Partial Redeployment for Java EE Module Updates".8.2Understanding When to Use Different Redeployment StrategiesThe following table summarizes each WebLogic Server redeployment strategy and describes the scenarios in which you would use each strategy.8.3Using Production Redeployment to Update ApplicationsWebLogic Server enables you to redeploy a new, updated version of a production application without affecting existing clients of the application, and without interrupting the availability of the application to new client requests.8.3.1How Production Redeployment WorksWebLogic Server performs production redeployment by deploying a new version of an application alongside an older, running version of the application. While redeployment is taking place, one version of the application "active," while the other version is "retiring." The active application version receives all new client connection requests for the application, while the retiring application version processes only those client connections that existed when redeployment took place. WebLogic Server Table 8–1Summary of Redeployment StrategiesRedeployment StrategySummaryUsageProduction RedeploymentRedeploys a newer version of an application alongside an existing version of the application.
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