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