Increasing the capacity of the message store 50 only requires increasing either or both of {HEAD ~ the maximum number} of {TAIL ~ index nodes} 55 a c and storage nodes 
Increasing the capacity of the message store 50 only requires increasing either or both of { HEAD ~ the maximum number } of { TAIL ~ index nodes } 55 a c and storage nodes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH