dagda_save_platform() function, which can only be called
from a client, records all the data managed by the agents' or SeDs'
DAGDA components that allow it.
Then, the “restoreOnStart” configuration file option asks to the DAGDA component to restore the data stored on the “dataBackupFile” file when the component starts. This mechanism allows to stop the DIET platform for a while and restart it conserving the same data distribution.