In the rapidly evolving Cloud market, the amount of data being generated is growing continuously and as a consequence storage as a service plays an increasingly important role. In this paper, we describe and compare two new approaches, deriving from the EU funded FP7 projects OPTIMIS and VISION Cloud respectively, to filling existing gaps in Cloud storage offerings. We portray the key value-add...

C loud storage is growing at a phenomenal rate, fueled by multiple forces, including mobile devices, social networks, and big data. Content is created anytime and anywhere on billions of smartphones and tablets; high-resolution photos and videos are frequently uploaded to the cloud automatically as soon as they're captured. A Gartner report predicts that consumer digital storage will grow to 4....

This paper illustrates various content sharing systems that take advantage of cloud’s storage and computational resources as well as their supporting conventional technologies. First, basic technology concepts supporting cloud-based systems from a client-server to cloud computing as well as their relationships and functional linkages are shown. Second, the taxonomy of cloud-based system models ...

With popularization of cloud services, multiple users easily share and update their data through cloud storage. For data integrity and consistency in the cloud storage, the audit mechanisms were proposed. However, existing approaches have some security vulnerabilities and require a lot of computational overheads. This paper proposes a secure and efficient audit mechanism for dynamic shared data...

This paper deals with the task scheduling of the cloud storage system. Firstly, we analyze the differences within the cloud storage, the data grid and the cloud computing, point out that existing PSO based task scheduling algorithm of cloud computing is lack cost control ability and can not ensure the solution is in the Exist Solution Space which have to be guaranteed in cloud storage system. I...

In the current era of cloud computing, data stored in the cloud is being generated at a tremendous speed, and thus the cloud storage system has become one of the key components in cloud computing. By storing a substantial amount of data in commodity disks inside the data center that hosts the cloud, the cloud storage system must consider one question very carefully: how do we store data reliabl...

During the last years, cloud computing has been quickly adopted worldwide, and several solutions have emerged. Cloud computing is used to providing storage service, computing power and flexibility to end-users, in order to access data from anywhere at any time. Although, all benefits introduced by cloud computing, this technology still faces several challenges related to privacy, security, robu...

The real world scenario of cloud is users wish to store massive data in to the cloud database. So, Cloud must store the data without any failure. Sometimes, the data is striped across multiple cloud vendors. If a cloud suffers from a permanent failure and loses all its data, we need to repair the lost data with the help of the other surviving clouds to preserve data redundancy. We present a pro...

A Cloud data storage system consists of collection of storage servers over the internet which provides long term storage services. The data stored in a third party’s cloud system may cause serious concern over data confidentiality. To keep sensitive user data confidential against un-trusted servers and to provide security, access control in cloud there are some cryptographic techniques speciall...