Hey Mark,
Mark Eggers schrieb:
I'm looking at clustering and have a few questions.
1. In the documentation, the Cluster element is shown
as a child of the Engine element. In the example
server.xml the Cluster element is shown in the Host
element.
When I put the Cluster element in the Host element, I
get clustering messages in catalina.out. I don't get
this if I put the Cluster element in the Engine
element.
So the proper location for a Cluster element is inside
a Host element?
Currently clustering work only inside host element. Per catalina design
we can also have a
cluster inside an engine or context. I hope in future we can add the cluster
also inside the engine. It look like a server.xml option and small
changes inside code!
For backup a virtual hosting szenario this feature was useful. I add
this topic
to the cluster todo list.
I also start to wrote a better cluster documentation for 5.5.10 (look
inside cvs head)
and help are very welcome :-)
2. There is a statement concerning number of threads
would be optimal if it matched the number of nodes.
This statement means the number of cluster backup nodes!
I
am fronting Tomcat with Apache/mod_jk. Would the
number of nodes be the maximum clients I have
configured for Apache times the number of Apache
servers that can hit this Tomcat server?
I am looking at having several virtual hosts running
under one Tomcat instance. Does this mean I need to
have a separate Cluster element for each virtual host?
Today, this is true, but in my real life, I have only one or two heavy
application services per tomcat instance that
works inside a cluster. Let us know your use case?
Thanks for helping me get started on this.
/mde/
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