Abstract-Data replication is a promising technique forincreasing access performance and data availability in Data Grid (DG) systems. Current work on data replication in Grid systems focuses on infrastructure for replication and mechanisms for creating or deleting replicas. The important problem of determining minimum number of replicas, as well as their locations in DG has not been well studied.In this paper, we propose an algorithm is formulated by using dynamic programming-based algorithm to find Optimal Number of Replicas (ONR) of a dataset over DG systems, such that the read cost (i.e. transferring object over the Data Grid systems to the end-user)plus the cost of storage (i.e. site building cost) is minimized. We have also proposed a sketch of the proof for our algorithm and its integrity.
Hybrid CDN-P2P networks (HCDNs) combine Peer to Peer (P2P) networks and Content Delivery Networks (CDN) to benefit from their complementary advantages. In order to enable a traditional CDN to offer hybrid content delivery service, we introduce a resource scheduling mechanism to perform the request routing process and determine the desired level of contribution for users. The proposed mechanism relies on a truthful, profit maximizing, envy-free auction to optimize contributions of the end-users in P2P content delivery. Based on the proposed solution, economics of content delivery in the HCDN are studied and it is shown that through our resource scheduling mechanism, it is possible to serve a big fraction of end-users with higher quality content, increase the net profit of the HCDN provider, and decrease expenditures of the content provider simultaneously.
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