[jboss-dev-forums] [Clustering Development] - How to write your own load balancing rule in mod_cluster?

[Brian Stansberry]

Brian Stansberry [http://community.jboss.org/people/bstansberry%40jboss.com] replied to the discussion

"How to write your own load balancing rule in mod_cluster?"

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I don't think of it as being round-robin. The ModClusterService on each appserver side provides the httpd side a metric indicating how much load it's under. When the httpd side detects a request for a new session it picks the server to route to based on the relative load. There may be some round-robinish bit that goes in case of a tie, but that's not the critical factor. So I'm not sure what you're looking to change.

There are a lot of options for configuring how the load metric is calculated; see the docs.

Any change to how the httpd side picks a server based on the relative load metrics will involve changes to the C code for the Apache httpd modules. If you still think there's a use case for customizing that, suggest you post on the mod_cluster forum at  http://community.jboss.org/en/mod_cluster http://community.jboss.org/en/mod_cluster
 where Jean-Frederic Clere, the man most familiar with the C side of things, is more likely to see your question.

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