Re: Systems Architecture Pros and Cons

2005-10-13 Thread Peter Johnson
And you did :-) I'm sorry if my reply sounded grumpy (did it?). I guess I misinterpreted your intention for open discussion. No wasn't grumpy I was a little frustrated as the discussion had gone off the bat from the beginning :( The reason why I said two TCs is, well, it would be nice to h

Re: Systems Architecture Pros and Cons

2005-10-13 Thread Peter Johnson
If you measure the resource util on the apache boxes while under load, you may find that you can get by with A single apache instance and 4 tomcat instances (each on it's own box). You may be able to but you lose the ability to load balance across the Apache instances for high-availability.

Re: Systems Architecture Pros and Cons

2005-10-13 Thread Peter Johnson
Nix, I am fully aware of all of this (regarding security permissions etc) ... I am not trying to solve a problem but rather open a discussion with the community on how people prefer to structure their systems. Some run only Tomcat, some run multiple servers with Apache and Tomcat, some tier the

Re: Systems Architecture Pros and Cons

2005-10-13 Thread Peter Johnson
Let's just say there are complex rewrite rules and funky virtual hosting happening with some requests being proxied through to Tomcat. Yes yes mod_jk or mod_jk2 should be being used however apparently when they were originally testing the connectors they found them to continually fall over afte

Re: Systems Architecture Pros and Cons

2005-10-13 Thread Peter Johnson
It will depend a great deal on the nature of your application and how many end users you think you may have. Also, how will you manage your storage/database (internal to the 5 boxes, external array, two extra boxes on fail-over etc)? Is your application read heavy or write heavy? Why? This dis

Re: Systems Architecture Pros and Cons

2005-10-13 Thread Peter Johnson
by compromising Apache or Tomcat the intruder can effectively impersonate as either tier. Leon Rosenberg wrote: On 10/13/05, Peter Johnson <[EMAIL PROTECTED]> wrote: Pro: - enhanced security due to tiers Why? If tomcat has a security hole, putting an apache in front of it, wo

Re: Systems Architecture Pros and Cons

2005-10-13 Thread Peter Johnson
Leon Rosenberg wrote: Option 3. All 5 run tomcats. What do you need apache for? I thought this might be a response hence the comment "assuming that both Apache and Tomcat are used" Apache is utilised heavily and removing it isn't an option.

Systems Architecture Pros and Cons

2005-10-12 Thread Peter Johnson
Hi All, I was discussing with someone two common system architectures for a web application environment and thought I'd extend it to the Tomcat community to see their views / thoughts. If we consider that there are 5 servers available, what is the best way to utilise them assuming that both