I'm on enterprise and so it might be different.
[zenoss@zenoss ~]$ ls /opt/zenoss/perf/Daemons/localhost/zenprocess*.pickle
/opt/zenoss/perf/Daemons/localhost/zenprocess-getConfigNames.pickle /opt/zenoss/perf/Daemons/localhost/zenprocess-threshold-classes.pickle
/opt/zenoss/perf/Daemons/localhost/zenprocess-properties.pickle /opt/zenoss/perf/Daemons/localhost/zenprocess-thresholds.pickle
try running without the dataroot option then. It could take awhile depending on how many devices you have. What version are you on?