Check_MK: Aggregate graphs

Using PNP4Nagios may be able to customize, e.g. aggregation, rrd graphs in check_mk multisite.

Quote: This is more a pnp4nagios question then a check_mk one

http://docs.pnp4nagios.org/pnp-0.6/tpl_special

IMHO special templates will fit your needs

REF: http://lists.mathias-kettner.de/pipermail/checkmk-en/2012-March/005227.html