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