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The WTFast's Gamers Private Network (GPN®) is a client/server solution that makes online games faster. GPN® connects online video-game players with a common game service across a wide-area network. Online games are interactive competitions by individual players who compete in a virtual environment. Response time, latency and its predictability are keys to GPn® success and runs against the vast complexity...
This paper considers a hybrid peer-to-peer (p2p) system, a dynamic distributed caching system with an authoritative server dispensing contents only if the contents fail to be found by searching an unstructured p2p system. We study the case when some peers may not be fully cooperative in the search process and examine the impact of various noncooperative behaviors in the aspect of scalability, more...
The network applications and development deserve to be refined according to the rise of cloud services with scalable storage and computing power. In this paper, the consistence problem that overlay network and physical network are not converged in P2P networks is improved by cloud-assistance. To completely manage the locality information of peers in cloud, a cloud database of mapping IP addresses...
This paper studies the load balancing problem in distributed systems designed for massively multiplayer online role-playing games (MMORPGs). More concretely, we consider a distributed system of master-worker type in which each worker is associated with a particular region in the game field, and propose a scheme to balance the load of workers as much as possible. The basic idea of the proposed scheme...
Provisioning in cloud functions through obtaining information of physical and virtual machines, known as resource discovery. The existing such resource discovery schemes are centralized in nature, imposing scalability and single point failure issues in overall datacenter operations. As peer to peer (P2P) approaches are inherently scalable and invincible to single point vulnerability, this paper proposes...
In this paper, we investigate a decentralized approach to timestamping transactions in a replicated database, under partial replication in Peer-To-Peer (P2P) environments. In order to solve problems of concurrent updates and node failures, we propose an architecture based on quorums, this architecture allows assigning a unique timestamp to each distributed transaction, to select the servers replicas...
Semantic caching is a technique used for optimizing the evaluation of database queries by caching results of old queries and using them when answering new queries. CoopSC is a cooperative database caching architecture, which extends the classic semantic caching approach by allowing clients to share their local caches in a cooperative matter. Cache entries of all clients are indexed in a distributed...
Peer-to-peer systems based on Distributed Hash Tables face tradeoffs between the performance (latency or availability) and their desired functionality. In fact, lookup latency is affected by the mismatch problem between the overlay hop and the underlying topology. So, applications built on top of such systems can be impacted. A core problem in peer-to-peer systems is the distribution of items to be...
An analytical framework is developed to derive the response time and service availability of client/server based SOA and P2P based SOA. The impact on the response time and service availability for varying load conditions and connectivity for both client/server and P2P SOA implementation is studied. It is found that the response time reduces significantly in P2P based SOA depending on network connectivity...
Content Delivery Network (CDN) is a system where computers networked together across the Internet. Contents (especially large media content) are replicated from the origin server to cache servers scattered over the world in order to deliver content to end users in a reliable and timely manner. Cooperation and coordination among them can solve many problems of a particular CDN and is achieved by Virtual...
Node clustering is an effective solution for achieving good performance and high reliability for peer-to-peer (P2P) systems. To improve the performance of a clustered P2P system, it is important to balance the service load among the clusters in the system. In this paper, we describe a diffusive load balancing scheme for clustered P2P systems, which dynamically adjusts the size of the clusters, by...
The management of the large scale heterogeneous resources is a critical issue in grid computing. The resource management system (RMS) is an essential component of grids. To ensure the QoS of the upper layer service, it raises high requirement for the performance, fault-tolerance and scalability of RMS. In this paper, we study three typical structures of RMS, including centralized, hierarchical and...
The virtual infrastructure has become more and more popular in the grid and cloud computing. With the aggrandizement scale, the management of the resources in virtual infrastructure faces a great technical challenge. To support the upper services effectively, it raises higher requirements for the performance, fault-tolerance and scalability of virtual infrastructure management systems. In this paper,...
This paper proposes HELP://, a simple light-weight protocol that runs over HTTP and is used to disseminate information from a server(s) to its clients during the time of a crisis. HELP runs on an architecture that is a hybrid mix between a pure client/server architecture and a peer-to-peer architecture. Its resemblance to one versus the other is dynamically decided based on load. In particular, under...
We describe a method of adaptively controlling bandwidth allocation to flows for reducing the file transfer time of short flows without decreasing throughput of long-duration large flows. According to the rapid increase in Internet traffic volume, effective traffic engineering is increasingly required. Specifically, the traffic of long-duration large flows due to the use of peer-to-peer applications,...
Peer-to-peer mechanisms are considered as one of the key innovative and user-friendly solutions for real-time Internet communication services. Eliminating server-based architecture, reducing or eliminating configuration effort, and allowing end-user devices to bring resources into the network, will reshape the network as we currently know it. This presents substantial opportunities for networks and...
The paper deals with the study of the optimisation of the distribution of the download time from a particular video on demand system. This VOD system is based on grid delivery network which is an hybrid architecture based on P2P and grid computing concepts. In this system, the data are shrunk into fixed size blocks which must be replicated on hosts to decrease the total download time. We propose an...
This paper describes performance comparison of load balancing control through code migration in distributed desktop computing grids. A prototype of the middleware which migrates object code for computing is implemented, and the trade-off of code migration was observed. Based on the prototype experiment, several algorithms for location policy in desktop computing grids were examined on simulations,...
Ubiquitous computing requires an intelligent environment where the users do not need to be involved in the operation. The agent technology allows effective implementation of ubiquitous system, while agent platform provides efficient and stable interaction between the agents. In this paper we propose a hierarchical P2P networking approach where the messages are combined inside the agent platform and...
Replication is used in data grid to enhance data availability and fault tolerance. The random burst of data requests may increase the frequency of dynamic replication thus putting system nodes under heavy storage load and delaying execution of jobs. We propose a load balancing replication strategy, Fair-Share Replication(FSR) that takes into account both the access load and storage load of the replica...
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