General question regarding CDR data

[nbthost]

you can do “eventually erased over time” manually;

How to clear CDR Database

Thanks for your steps. I modified it slightly to simplify it and to only delete CDRs older than a date. Here are the steps: SSH to the server. mysql use asteriskcdrdb; DELETE from cdr WHERE calldate < ‘2013-11-01 00:00:00’; In the example above any CDR before Nov 1 2013 will be deleted. Change the date to whatever date you would like to use.

And for backing up;

you can use “backup and restore” module,