The message is physically stored in a hierarchical message store using {TAIL ~ the index node and storage node identifiers} for {HEAD ~ subsequent retrieval} and scanning 
The message is physically stored in a hierarchical message store using { TAIL ~ the index node and storage node identifiers } for { HEAD ~ subsequent retrieval } and scanning
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH