(Dist) (ZOS)
Routing to multiple cells
Intelligent Management for Web Servers routes HTTP requests to multiple WAS cells without regeneration of the plug-in configuration file after environment changes. When servers, cluster members, applications, or virtual hosts are added, removed, started, stopped, or modified, the up-to-date information is dynamically delivered to the WebSphere plug-in.
To use routing rules to route to multiple cells, each cell must have a different cell name. Use the procedure at Configure Intelligent Management for web servers to set up routing from the Intelligent Management enabled WebSphere plug-in to applications in multiple cells. There is no change in the procedure to configure multi-cell routing, however, you now have the capability to install the same application in multiple cells.
By default, dynamic routing load balances requests across all servers that can handle the request. To override the default behavior, configure routing rules. Routing rules can route requests to specific server resources, redirect requests, or reject requests. Examples:
- If we deploy the same application to two different clusters, we can use routing rules to direct requests from a particular set of client IP addresses to one of the clusters and the rest of the requests to the other cluster.
- If we deploy the same application in multiple cells, we can use routing rules to send the requests only to the first cell, unless no servers are available in the first cell, then send requests to servers in the second cell.
Related:
Intelligent Management for web servers and routing rules