The system 1, wherein, to route the message to the participating peer node corresponding to the identifier comprised in the message according to the routing information, the one of the plurality of {TAIL ~ peer nodes} is further configured to send the message to {HEAD ~ the participating peer node} corresponding to the identifier comprised in the message according to the routing information 
The system 1 , wherein , to route the message to the participating peer node corresponding to the identifier comprised in the message according to the routing information , the one of the plurality of { TAIL ~ peer nodes } is further configured to send the message to { HEAD ~ the participating peer node } corresponding to the identifier comprised in the message according to the routing information
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