I deployed jenkins in tomcat using war deployment with successful results. Configuring jobs & nodes worked properly and CI works good. I was wondering, where is the information about the job & nodes stored in jenkins? Since I might want to take a periodic backup of the configuration data, to automate another CI in case first CI machine goes down.
In ~/.jenkins by default, but this can be configured. ~ is the home directory of the user that runs the container (e.g. Tomcat). See the documentation on how to change this (what I recommend).