Free riding is a great challenge to the development and maintenance of Peer-to-Peer(P2P)networks.A file migration and workload balancing based approach (FMWBBA)to discourage free riding is proposed in this *** heart o...
详细信息
Free riding is a great challenge to the development and maintenance of Peer-to-Peer(P2P)networks.A file migration and workload balancing based approach (FMWBBA)to discourage free riding is proposed in this *** heart of our mechanism is to migrate some shared files from the overloaded peers to the neighboring free riders automatically and transparently,which enforces free riders to offer services when altruistic peers are heavily *** migration is a key issue in our approach,and some related strategies are discussed.A simulation is designed to verify this approach,and the results show that it can not only alleviate free riding,but also improve the Quality of Service(QoS)and robustness of P2P networks efficiently.
In gridcomputing environment,grid users often *** the original user may be under the risk of information leakage and identity abused for sending his credential to remote computing *** grid security practice has few m...
详细信息
In gridcomputing environment,grid users often *** the original user may be under the risk of information leakage and identity abused for sending his credential to remote computing *** grid security practice has few means to enforce the security of credential *** computing (TC) technology can be added to gridcomputing environment to enhance the grid *** TC using an essential in-platform (trusted)third party,Trusted Platform Module (TPM),we can use TC to protect the user *** this paper we present credential migration management (CMM) system,which is a part of Daonity project,to manifest migrating credential in security between different computers with TPM.
In this short paper, we present our solution to index, store and retrieve the domain knowledge. The main principle exploits Lucene to index the domain knowledge under guide of the domain schema. The method to map doma...
详细信息
ISBN:
(纸本)1595934804;9781595934802
In this short paper, we present our solution to index, store and retrieve the domain knowledge. The main principle exploits Lucene to index the domain knowledge under guide of the domain schema. The method to map domain knowledge structure into Lucene index structure, store and update the indices, and to transfer RDF-based query into Lucene's query are presented. Copyright 2007 ACM.
Any mistaken maintenance for the complicated and distributed grid can bring unpredictable disaster. Here we focus on the system availability issues caused by service dependencies during the maintenance in grid. A nove...
详细信息
P2P technology has been widely adopted in live streaming system for its scalability and low commercial cost. However, tree based system or mesh based system still has to face the constraint or tradeoff caused by its s...
详细信息
grid workflow is a complex and typical grid application, but owing to the highly dynamic feature of grid environments, resource unavailability is increasingly becoming severe and poses great challenges to grid workflo...
详细信息
ISBN:
(纸本)9781595937575
grid workflow is a complex and typical grid application, but owing to the highly dynamic feature of grid environments, resource unavailability is increasingly becoming severe and poses great challenges to grid workflow scheduling. Though fault recovery mechanism adopted in grid system guarantee the completion of jobs to some extent, but wasting system resources. To overcome the shortcoming, this paper proposes a Markov Chain based grid node availability prediction model which can efficiently predict grid nodes' availability in the future without adding significant overhead. Based on this model, the paper presents a grid workflow scheduling based on reliability cost (RCGS). The performance evaluation results demonstrate that RCGS improves the dependability of workflow execution and success ratio of tasks with low reliability cost.
Peer-to-Peer (P2P) networks have been shown to be a promising approach to provide instant voice services over the Internet for its potential high scalability. However, for one paired peers, how to efficiently transmit...
详细信息
Multimedia streaming and video on demand (VoD) services are among those hottest applications over the Internet. Traditional client/server pattern is stumbled due to the lack of scalability and limitation of service ca...
详细信息
ISBN:
(纸本)0780393112
Multimedia streaming and video on demand (VoD) services are among those hottest applications over the Internet. Traditional client/server pattern is stumbled due to the lack of scalability and limitation of service capacity. Peer-to-Peer paradigm has been introduced to solve these issues. The key idea is that peers not only receive multimedia stream but also serve multimedia data to others. In this paper, we present a novel scheme that builds a multimedia streaming and caching service on a distributed hash table (DHT) based overlay. We adopt DHT to establish a decentralized caching service. The location information of cached segments is distributed among different peers and the information about segments from the same video is organized into an application-level multicast group. We also propose a cache replace algorithm on each peer. In our simulation, our design achieves good scalability with a low service reject rate. Besides, good load balance is also achieved as well as desired quality-of-service.
In this paper we present GPE4CGSP, which targets the interoperability between GPE (grid Programming Environment) and CGSP (Chinagrid Support Platform). The web services technique and gridftp data transfer protocol are...
详细信息
暂无评论