A unique filename is generated for {TAIL ~ each screened message} and a pair of {HEAD ~ index node and storage node identifiers} are calculated from the unique filename 
A unique filename is generated for { TAIL ~ each screened message } and a pair of { HEAD ~ index node and storage node identifiers } are calculated from the unique filename
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH