The WebSphere Application Server master configuration repository
stores configuration files for all the nodes in the cell. When you upgrade
the deployment manager from one release of WebSphere Application Server to
another, the configuration files that are stored in the master repository
for the nodes on the old release are converted into the format of the new
release.
With this conversion, the deployment manager can process the configuration
files uniformly. However, nodes on an old release cannot readily use configuration
files that are in the format of the new release. WebSphere Application Server
addresses the problem when it synchronizes the configuration files from the
master repository to a node on an old release. The configuration files are
first transformed into the old release format before they ship to the node.
WebSphere Application Server performs the following transformations on configuration
documents:
- Changes the XML name space from the format of the new release to the format
of the old release
- Strips out attributes of cell-level documents that are applicable to the
new release only
- Strips out new resource definitions that are not understood
by old release nodes