cacti backup

[curioshuman]

I am trying to understand what the essential parts of cacti system are that need to be backed up incase we need to restore the system from a crash.
I see mysql database is important.
I also see that /var/lib/cacti/rra has some .rrd files, do these need to be backed up too? Are there any other components that need to be backed up too?

[tertius]

The mysql database contains cacti configuration info. Machine info, definition of data sources and graphs.

The *.rrd files contain the actual data collected. This is the "real" database. Configuration can be reentered into a fresh instance, but if you lose the *.rrd files, you lose all historic data.