On 12 Apr 2013, at 12:00, Jamie <ja...@mailarchiva.com> wrote: > Greetings! > > I would like some advice with regards to deploying a web app in a > multi-tenant scenario. A while back, we had a few cloud service providers ask > us if they could host our web app as a service. Under pressure to come with a > quick solution, we responded by implementing a manager like application (much > like the Tomcat manager app), that could deploy additional web apps by > copying the contents of our WAR file to a new directory under webapps . For > instance: > > webapps\customer1 > webapps\customer2 > etc. > > This approach works but it presents several problems: > > * When there are a large number of webapps, Tomcat takes a long time > to load. This can be mitigated to a minor extent with TC7's new > parallel load feature. > * Tomcat uses alot more memory that it would otherwise since it has to > load the classes pertaining to each webapp multiple times > * The contents of one war file is duplicated several times. When there > are a large number of webapps, it becomes difficult to manage all > the files and state of the server. > > The advantage of the approach is that each web app can potentially run a > different version of our software.
If it's different versions, you can't avoid loading the jars in each case, can you? > My question is - how does one configure TC7 such that it will: > > * Have the ability to load the same webapp multiple times, while > pointing it to one WAR file webapp path Just script the deployment process, if the management overhead is high. > * Prevent Tomcat from loading the class files and resources of the > same WAR file multiple times Can't be done. You can put jars in tomcat/lib, if they're safe and as long as you don't put the same jars or different versions of them elsewhere on the classpath. > * Start up each app as fast possible App specific, talk to your devs. > * Such as that the addition of new instances will be as scalable as > possible. There's no magic bullet & I find that attempts to rationalise like this often lead to problems later. p > Much appreciate > > Jamie > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
