adding new datasource to an existing RRD

Question

I have few 100s of rrds and i want to add 5 extra datasource to all of those rrds.

1. Is it advisable to do so
2. Whats the best way and the fastest way to do

Answer 1

use rrddump and rrdrestore.

just so:

rrdtool dump my.rrd > file.xml

./rrdAddDS.pl file.xml newDsName > new_file.xml

rrdtool restore new_file.xml my_new.rrd

you can refer from here: http://osdir.com/ml/db.rrdtool.user/2003-08/msg00115.html

and here: http://www.docum.org/drupal/sites/default/files/add_ds_to_rrd.pl_.txt