Clusters

[Steve Haines <sh...@ipnetsolutions.com>]

Does Tomcat 3.2 support sharing sessions between clusters of Tomcats running
in a web farm environment?  

The documentation spoke of plug-able session managers but gave very little
help.

If this is the only way, will Tomcat 4.0 support clustering??

Thanks in advance!
Steve

Re: Clusters

["Craig R. McClanahan" <Cr...@eng.sun.com>]

Steve Haines wrote:

> Does Tomcat 3.2 support sharing sessions between clusters of Tomcats running
> in a web farm environment?
>

It depends on what you mean.  Tomcat 3.2 has "load balancing" support, when
running behind Apache, that is essentially equivalent to what Apache JServ had:
* When you are not in a session, requests are
  randomly handed out to the servers running this app.
* When you start a session, all future requests for that
  session are returned to the same server.
* No support for migrating a session from one server to
  a different one.

>
> The documentation spoke of plug-able session managers but gave very little
> help.
>
> If this is the only way, will Tomcat 4.0 support clustering??
>

It doesn't at the moment.  With Tomcat 4.0 essentially at feature freeze (we're
about to start doing betas), it won't happen in 4.0 -- but this is very high on
my list of desired features for 4.1.

Now all we need is for people to help build it ...

>
> Thanks in advance!
> Steve

Craig