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From Jeffrey Janner <Jeffrey.Jan...@PolyDyne.com>
Subject RE: mod_jk Avoid loadbalancing
Date Tue, 15 Nov 2011 15:00:36 GMT
Alexander -
From reading your emails, it sounds like you have the following setup

                       F5 HW-balancer
                             |
                            / \
                           /   \     Level 1 balancing
                          /     \
                       HTTPD1  HTTPD2
                          |      |
                     ----------------   Level 2 balancing
                     |       |      |
                    TC1     TC2    TC3

Is that correct?
You state that you want to eliminate Level 2.
However, from a performance standpoint, why would you?  Without the Level 2 balancing, it
is conceivable that one of the 3 Tomcats could end up processing the bulk the JSP requests.
However, Pid is correct. If you are worried about performance, you could drop the HTTPD servers
and balance directly to the Tomcat servers.  Tomcat is just as fast at delivering static content
as HTTPD, and it simplifies deployment.

Jeff

> -----Original Message-----
> From: Alexander Diedler [mailto:adiedler@tecracer.de]
> Sent: Tuesday, November 15, 2011 5:56 AM
> To: Tomcat Users List; pid@pidster.com
> Subject: AW: mod_jk Avoid loadbalancing
> 
> Hello,
> Yes, it was an option to solve my problem. But what about the
> performance?
> My opinion was to forward only necessary requests to the Tomcat (jsp,
> java
> etc) and let the Apache HTTPD deliver the static content (CSS,JS,Images
> etc).
> 
> Best regards
> Alexander
> 
> 
> 
> -----Urspr├╝ngliche Nachricht-----
> Von: Pid [mailto:pid@pidster.com]
> Gesendet: Dienstag, 15. November 2011 12:41
> An: Tomcat Users List
> Betreff: Re: mod_jk Avoid loadbalancing
> 
> On 14/11/2011 10:42, Alexander Diedler wrote:
> > Hello
> >
> >
> >
> > It is possible in a three node TC 6.0 / TC7.0 Cluster to avoid the
> > loadbalancing between these three nodes? We only need the session
> > replication. The Loadbalancing with failover will be done by a Big-IP
> > F5, so we don┬┤t need a "double" balanced request, first time by the
> > HW-balancer and second time by the Apache mod_jk himself.
> 
> So don't put httpd+mod_jk in front - just point the F5 at the Tomcats.
> 
> 
> p
> 
> 
> --
> 
> [key:62590808]

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