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From "Angus Mezick" <amez...@guidestar.org>
Subject RE: Clustering / Load Balancer / Session Cookie
Date Thu, 29 Apr 2004 15:02:26 GMT
JK2 will allow you to staticly load balance with error detection between
one (or more apache's) and many tomcats.  You just won't get a "least
connections" algorithm.

> -----Original Message-----
> From: Dale, Matt [mailto:Matt.Dale@beCogent.com] 
> Sent: Thursday, April 29, 2004 10:59 AM
> To: Tomcat Users List
> Subject: RE: Clustering / Load Balancer / Session Cookie
> 
> 
> 
> Ah thanks, i'll give pen a shot I think. I was going to ask 
> about using JK2 on the balancer machine to redirect the 
> requests as  the url would appear the same then too. But the 
> balancers you posted look like better options.
> 
> Thanks
> Matt
> 
> -----Original Message-----
> From: Filip Hanik - Dev [mailto:devlists@hanik.com]
> Sent: 29 April 2004 15:47
> To: Tomcat Users List
> Subject: Re: Clustering / Load Balancer / Session Cookie
> 
> 
> http://siag.nu/pen
> http://balance.sourceforge.net
> 
> pen is my favorite, performs best and works on both windows and unix
> 
> Filip
> ----- Original Message -----
> From: "Dale, Matt" <Matt.Dale@beCogent.com>
> To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
> Sent: Thursday, April 29, 2004 8:51 AM
> Subject: RE: Clustering / Load Balancer / Session Cookie
> 
> 
> Thanks for the quick reply.
> 
> So the supplied tomcat load balancer isnt of any use for 
> stateful sessions where the cluster is spread accross several 
> machines?
> 
> -----Original Message-----
> From: Peter Lin [mailto:tcw00lfel@yahoo.com]
> Sent: 29 April 2004 14:44
> To: Tomcat Users List
> Subject: Re: Clustering / Load Balancer / Session Cookie
> 
> 
> 
> to paraphrase, you want to have it look like the same machine 
> to the browser (ie user).
> 
> the easiest way is to use a hardware load balancer. I've use 
> this approach a couple times in the past and it works well.
> 
> peter lin
> 
> 
> 
> "Dale, Matt" <Matt.Dale@beCogent.com> wrote:
> 
> Hi,
> 
> I'm currently testing a setup up on 3 machines.
> 
> 2 have tomcat 5.0.19, these 2 are clustered with session 
> replication and have a simple test app.
> 
> The other, also 5.0.19, runs the supplied balancer app.
> 
> I've written a simple round robin rule which passes the 
> requests back and forth as it should, I can see the sessions being
> replicated fine in the logs so all is ok there.
> 
> BUT my problem is accessing the same session on both 
> machines. Basically I'm stumped, I know its not accessing the 
> same session
> because the redirected URL is different but how can I get around this?
> 
> I've tried a using an HTML frame on the balancer machine but 
> that was clutching at straws and obviously didnt work.
> 
> Any ideas would be appreciated.
> 
> Ta
> Matt
> 
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