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Mutual exclusion as one of the main problems associated with distributed systems requires that at any time t, only one site can access the common copies of file f. As a result of node or link failures, distributed system may be partitioned into two or more groups of nodes which cannot communicate each other anymore; meanwhile they must be able to update their copies of file f consistently, in order to keep the system up. Voting algorithms are the main solutions presented to maintain mutualdoi:10.1155/2013/120308 fatcat:urj2c6egyndv5f647xjtrmsrxe