Re: tomcat cluster for stateless web application

2012-06-14 Thread Christopher Schultz
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Pid,

On 6/13/12 8:12 AM, Pid * wrote:
 On 12 Jun 2012, at 18:22, Albert Kam moonblade.w...@gmail.com
 wrote:
 
 I've noticed that in the documentation, it says a lot about
 session replication.
 
 I wonder what can be omitted in the configurations for a
 stateless java webapp setup (without any sessions), to hopefully
 get a simpler configuration or even gain more efficiency, 
 bypassing the replication altogether ?
 
 Well, start by not configuring the cluster. That should be enough.

+1

Formal clustering (in Tomcat) is only useful for session
replication. If you don't need session replication, all you need is a
load balancer, and you don't really even need to configure it other
than to say balance these backend servers in some way (rr,
load-based, request-based, etc.).

If you are using Apache httpd with mod_jk, then you just need an lb
worker with balance_workers set to all the backend workers, and
disable sticky sessions (because the default is to use sticky
sessions, but you aren't creating sessions, anyway, right?).

- -chris
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Re: tomcat cluster for stateless web application

2012-06-13 Thread Pid *
On 12 Jun 2012, at 18:22, Albert Kam moonblade.w...@gmail.com wrote:

 I've noticed that in the documentation, it says a lot about session 
 replication.

 I wonder what can be omitted in the configurations for a stateless
 java webapp setup (without any sessions),
 to hopefully get a simpler configuration or even gain more efficiency,
 bypassing the replication altogether ?

Well, start by not configuring the cluster. That should be enough.


p



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 The past no longer is. The future has not yet come.
 Looking deeply at life as it is in the very here and now,
 the practitioner dwells in stability and freedom.
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Re: tomcat cluster for stateless web application

2012-06-13 Thread zhenek

On 06/12/2012 07:21 PM, Albert Kam wrote:

I've noticed that in the documentation, it says a lot about session replication.

I wonder what can be omitted in the configurations for a stateless
java webapp setup (without any sessions),
to hopefully get a simpler configuration or even gain more efficiency,
bypassing the replication altogether ?


Hi Albert,

only you have to setup is loadbalancer in front of your tomcat servers. 
That is all.


Regards,
Zdenek

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