[rrd-users] About rrdtool dump method

[Howard Jones]

On 22/06/2010 16:45, Wagner Pereira wrote:
> -------------------
> cacti:/var/lib/cacti/rra# rrdtool dump alpine_traffic_in_29.rrd > 
> alpine_traffic_in_29.rrd
> ERROR: mmaping file 'alpine_traffic_in_29.rrd': Invalid argument
>   
You are dumping the rrd file onto itself! The second filename should be
something.xml

That is why you end up with a 0 length file.