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