[Orca-users] clean up for unix domains no longer in existence -

[Saladin, Miki]

i am doing very careful cleanup on orca files for domains that no longer
exist but for which i wish to retain the graphs - 

i understand i don't need the daily orcallator raw data files any more but
can i also delete the rrd and the png files for these non existent domains
and just keep the html files to maintain any graphed data? 

which files are need to display the graphs ? html for sure - png? rrd?