Methods and systems are provided relating to a decentralized algorithm for managing replicas of a resource in a peer-to-peer network to satisfy quality of service requirements. Individual nodes within the network storing a resource replica continually monitor the node performance against quality of service (QoS) parameters and when necessary, take appropriate action to either add or delete the resource, all the while informing the other nodes within the network that maintain a replica of the resource of the particular action for dynamic fluctuation of the count of resource replicas therein.