[Yanel-dev] deployment

simon simon at 333.ch
Wed Jan 18 10:29:59 CET 2012


thanks very much for your fast and detailed answer.

cheers
simon



Am 18.01.2012 10:19, schrieb basZero:
> Hi Simon,
>
> in larger enterprise setups there is always a web server in front of 
> the application server (tomcat, glassfish, etc.).
> there are many advantages for having a web server in front of the app 
> server:
> - you can scale better (with plugins like mod_jk or alike you can 
> distribute the load over N application servers. Of course, the plugin 
> must support session stickyness, so that request with the same session 
> cookie gets forwarded to the same app server.
> - you can serve static content from the web server. this way you have 
> much less "noise" on the app server. Of course: web server must have 
> access to the content, so the deployment model might look different, 
> if web and appserver are on physically different machines
> - you can easily switch to a static maintenance page: you configure 
> the web server to show a certain page. during this time, you can 
> modify the app servers in the back end. if done, you can go back to 
> the normal configuration where requests are routed to the app servers
> - for highly secure applications, it's probably a must to introduce a 
> web server, as you can much better protect your app server from 
> unwanted requests (see for instance "perimeter authentication")
>
> downside of it is:
> - you have more infrastructure to maintain
> - more complex monitoring setup
> - more expensive
> - more complex support demand (if something goes wrong, you have to 
> analyze more)
>
> cheers
> balz
>
>
>
> On Wed, Jan 18, 2012 at 10:10 AM, simon <simon at 333.ch 
> <mailto:simon at 333.ch>> wrote:
>
>     hi all
>
>     just wondering why yanel resp. tomcat is mostly deployed behind an
>     apache?
>     what's the reason and does someone has experience in using the
>     tomcat without an apache web server in front?
>
>     cheers
>     simon
>     -- 
>     Yanel-development mailing list Yanel-development at wyona.com
>     <mailto:Yanel-development at wyona.com>
>     http://lists.wyona.org/cgi-bin/mailman/listinfo/yanel-development
>
>
>
>

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