Data migration can be done easily by using export and import. For example, you currently have Luntbuild running on HSQLDB database for some time, and you want to switch to MySQL for some reason. You can do the following steps to perform the transition:
Start Luntbuild running on HSQLDB, and export data to a file, let's say data.xml.
Stop Luntbuild, edit applicationContext.xml file to switch to use MySQL.
Start Luntbuild, and import data.xml into the system.
You are done!