Content Delivery Networks (CDN) aim at overcoming the inherent limitations of the Internet. The main concept at the basis of this technology is the delivery at edge points of the network, in proximity to the request areas, to improve the user’s perceived performance while limiting the costs. This paper focuses on the main research areas in the field of CDN, pointing out the motivations, and ana...

The Replica Placement Problem (RPP) aims at selecting the nodes for duplicating data objects in order to optimize their access. Even though a lot of work already exists on RPP, the issue of implementing the resulting allocation scheme is typically overlooked. In this paper we introduce the Replica Transfer Scheduling Problem (RTSP), briefly stated as: given a network of servers with limited sto...

In recent years, cloud computing research, specifically data replication techniques and their applications, has been growing. If the replicas number is raised put in multiple positions, it will be expensive to maintain usability, performance stability of application systems. this paper, two bio- inspired algorithms were proposed improve both selection placement environment. The suggested for dy...

Interest in distributed storage is fueled by demand for reliability and resilience combined with decreasing hardware costs. Peer-to-peer storage networks based on distributed hash tables are an attractive solution due to their efficient use of resources and resulting performance. The placement and subsequent efficient location of replicas in such systems remain open problems, especially (1) the...

Internet of Things (IoT) has lately been presented as a new technological transformation in which things are connected via the Internet. Several sensors and devices create data send vital signals constantly over sophisticated networks that allow machine-to-machine interactions monitor manage key smart-world infrastructures. Since huge amounts generated, reducing access costs is critical issue. ...

In the present paper, we study the most frequent data placement schemes, i.e., the organ-pipe and camel arrangements, in a mirrored disk system which supports cylinder replication at appropriate locations across the disk surface. Five schemes are proposed to identify the appropriate replica positions for the most frequently accessed cylinders. Three schemes, which are called Left, Right and Sym...

Data grids are middleware systems that enable users and applications to locate, access, and place large numbers of data sets in geographically distributed storage sites. In most existing and deployed grid systems however, control of the resources is centralized and usually handled by system administrators. Such configurations hinder dynamic and scalable expansion of the Grid infrastructure and ...

Peer-to-peer based (P2P) VoD systems have proven to be an effective solution for scalable video distribution. In P2P VoD, each peer contributes storage to replicate videos and assist video delivery. A fundamental question is how to optimally replicate video content across the peers so as to maximize their upload capacity. We study this question within the context of a large-scale P2P network wh...

Hadoop, an open source implementation of the MapReduce framework, has been widely used for processing massive-scale data in parallel. Since Hadoop uses a distributed file system, called HDFS, the data locality problem often happens (i.e., a data block should be copied to the processing node when a processing node does not possess the data block in its local storage), and this problem leads to t...