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From Leon Messerschmidt <>
Subject Re: Load Balancing installation
Date Wed, 01 Aug 2007 22:18:58 GMT

I've done quite a bit of work on this and I could add a summary of all
the load balancing information that is scattered through the mailing
list in the wiki if I could get access to it.

~  Leon

On Wed, 2007-08-01 at 18:02 -0400, Andrew Smalera wrote:
> Glad I can perhaps contribute something here since the list has been so 
> valuable to me.
> I have recently had Roller deployed to a high availability environment.  My 
> understanding (from what the datacenter folks tell me) is that the HA 
> configuration part of things is a load balancer in front of 2 boxes, each 
> with Apache, mod_jk, and Tomcat 5.0.  Behind that is an Oracle RAC DB (2 
> boxes also).  I'm not sure what load balancing method is being used.  So far 
> it seems to be running fine.
> some things I've noticed are:
> 1 - If you're changing some core settings (like front page blog handle I 
> believe) you'll want to restart the web app in Tomcat on the other server 
> for it to pick it up
> 2 - I deployed Roller as a unpacked directory vs. a WAR file and pointed 
> both servers at a shared location, seems to be working fine no competing for 
> resources etc.
> 3 - I set the file uploads directory to also be the same folder at a shared 
> location which I believe will eliminate the issue of one server uploading 
> the file and the other one not seeing it..  so I'd suggest doing that.
> We just deployed a few days ago so if I see anything else useful to relay I 
> will post it.
> Andrew
> ----- Original Message ----- 
> From: "Wladimir Boton" <>
> To: <>
> Sent: Wednesday, August 01, 2007 2:12 PM
> Subject: Load Balancing installation
> > Hi, How do I install Roller Weblogger in a Load Balacing infrastructure?
> >
> > I would like to install Roller in two machines. Thought round robin DNS or
> > hardware load balance device the user should be able to access either one
> > and see the same posts and comments.
> >
> > I think that I should install Tomcat using load balance with JK or
> > mod_proxy. But and about Roller itself? It is prepared to share the same
> > database? And about sharing the post images?
> >
> > I googled this subject and didn't find useful information.
> > Someone can help?
> >
> > -- 
> > Wladimir Boton
> >
> > 

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