Traditional memory allocation mechanisms are not suitable for new DRAM-based storage systems because they use memory inefficiently, particularly under changing access patterns. In contrast, a log-structured approach to memory management allows 80-90% memory utilization while offering high performance. The RAMCloud storage system implements a unified log-structured mechanism both for active info...

The removal of duplicate data from primary storage volumes in a cloud computing environment is increasingly desirable, as the resulting space savings contribute to the cost effectiveness of a large scale multi-tenant infrastructure. However, traditional archival and backup deduplication systems are not suited for large scale virtualized infrastructures and the I/O demanding applications there d...

Traditional memory allocation mechanisms are not suitable for new DRAM-based storage systems because they use memory inefficiently, particularly under changing access patterns. In theory, copying garbage collectors can deal with workload changes by defragmenting memory, but in practice the general-purpose collectors used in programming languages perform poorly at high memory utilisations. The r...

In a hybrid energy system consisting of renewable sources of energy, there should be some storage facility or backup generation to maintain continuity of supply to the load when renewable source alone is not sufficient. The objective of this paper is to present one of such generating system that is capable of acting as a backup generator. This paper presents the modeling and simulation of a mic...

due to limitations in computing resources of mobile nodes, mobile ad-hoc networks (manets) are very fault-prone. so far, redundancy at different levels of the network has been considered an efficient strategy to enhance the fault-tolerance of networks. indeed, ad-hoc networks are extremely redundant; therefore, natural redundancy to fault tolerance enhancement has a great impact on the network ...

“Cloud-based” Internet services rely on the availability and reliability of managed data centers. Recent events indicate that data centers tend to create centralized points of failure, and providing resilience to large-scale faults remains a significant challenge for both providers and users of cloud infrastructures. Running data centers also incurs high hardware and network costs, particularly...

Deduplication of primary storage volumes in a cloud computing environment is increasingly desirable, as the resulting space savings contribute to the cost effectiveness of a large scale multi-tenant infrastructure. However, traditional archival and backup deduplication systems impose prohibitive overhead for latency-sensitive applications deployed at these infrastructures while, current primary...

As we will cover later in the course, disk-based deduplication storage [1,3] has emerged as a dominant form of cost-efficient storage for data protection. In summary, as data is written to (or ingested by) such storage systems, deduplication mechanisms remove redundant segments of the data to compress the data into a highly compacted form. Data protection (i.e. disk backup) is the canonical app...

ARTICLE INFO Today is the most important issue in cloud computing is duplication for any organization, so we analysis this issue an avoid the reparative files on cloud storage. Avoidance of the file is advantages the cloud size issue. To protect the confidentiality of sensitive data while supporting deduplication, the convergent encryption technique has been proposed to encrypt the data before ...

For backup storage, increasing compression allows users to protect more data without increasing their costs or storage footprint. Though removing duplicate regions (deduplication) and traditional compression have become widespread, further compression is attainable. We demonstrate how to efficiently add delta compression to deduplicated storage to compress similar (nonduplicate) regions. A chal...