Interoperating multiple application server versions

WebSphere® Application Server Versão 9.0 is interoperable with other versions of the product under certain conditions.

Before you begin

Configurações suportadas Configurações suportadas:

Este artigo trata da migração da configuração de perfil. Para migrar seus aplicativos para a versão mais recente, use o Kit de Ferramentas de Migração do WebSphere Application Server. Para obter mais informações, consulte o Kit de ferramentas de migração no WASdev.

sptcfg

Read Overview of migration, coexistence, and interoperability and Migration considerations. For resources to help you plan and perform your migration, visit Knowledge Collection: Migration planning for WebSphere Application Server.

Interoperability applies to WebSphere administrative actions, administrative communication and to application client requests. WebSphere Application Server Versão 9.0 is generally interoperable with WebSphere Application Server Versão 7.0 ou posterior . However, there are specific requirements to address for each version. In general, you should apply the latest fix level to support interoperability. If this is not possible, then the following interim fixes can be used to support your environment.

You can upgrade a portion of the nodes in a cell to WebSphere Application Server Versão 9.0 while leaving others at the older release level. This means that, for a period of time, you might be administering servers that are at the current release and servers that are running the newer release in the same cell.
Restrictions on using mixed-release cells:
  • A mixed-release environment where some members are at an older release level might have some restrictions. See Creating application servers for more information.

For web application clients, interoperability is provided by employing the HTTP server plug-in at the highest version of all of the application servers in the cell. For example, a cell comprised of WebSphere Application Server Version 9.0 and Version 8.0 application servers would use a supported HTTP server with a Version 9.0 plug-in. See Technote Web server plug-in policy for WebSphere Application Server for more information.

Procedure

  1. Apply required interim fixes.

    All fixes are available on the Support site for WebSphere Application Server products.

  2. Upgrade the Software Development Kit (SDK) used to one supported by Versão 9.0.

    Read Recommended updates for WebSphere Application Server for more information.

What to do next

This information is dynamic and might be augmented by information in technical articles that are available on the IBM® DeveloperWorks WebSphere site. Check the site for the latest information.


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