Hanasaki JiJi wrote:

Hello,

> What is available, in Tomcat, or as an add-on, and preferably
> free/open-source to cluster tomcat for:
>   load balancing
>   fail over

humm filip hanik could answer with more details (or remy maucherat) but
as far as I know new Tomcat 5 code (backported to 4.1) use
the Javagroups library for replication mechanism. For tomcat 4.1,
adding jars (javagroups + patch) is enough to add theses features...
For tomcat 5, nothing needed because it's one of the new features...

>
>      how are session states replicated?

It's one of the limits of this system, because every put made, induces
replication for the entire object using broadcast (by default). So heavy
traffic...

>
> Also, in general, and a bit off-topic (my apologies), are there any
> resources for the design, or open source implementation, of load
> balancing / fail-over frameworks?

javagroups :)
google may point you to the current address !!!
I think that this porject recently joined the JBOSS project

>
> Thanks
>
Jerome



---------------------------------------------------------------------
To unsubscribe, e-mail: tomcat-user-unsubscribe@(protected)
For additional commands, e-mail: tomcat-user-help@(protected)