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SoLoMo services are mobile application services developed as the result of the progress in wireless networks and the popularization of mobile devices. Since SoLoMo services have different integrated types of IT services, users might have different needs and expectations for these services. Therefore, analysis of the priority of evaluation factors for users is extremely important in terms of the future...
Consolidation virtual machine (VM) on fewer physical servers is an efficient way to reduce energy consumption in data center. However, VMs often have inherent dependencies which bring complex load interactions among the underlying physical servers. Unreasonable migration will lead to a decline in network performance. In this paper, aiming at energy saving, we propose an application-aware policy in...
Power consumption is an increasingly impressing concern for data servers as it directly affects running costs and system reliability. Prior studies have shown that most memory space on data servers is used for buffer caching and thus cache replacement becomes critical. Two conflicting factors of buffer caching impacts memory energy efficiency: (1) a higher hit rate reduces memory traffic and thus...
Random accesses are generally harmful to performance in hard disk drives due to more dramatic mechanical movement. This paper presents the design, implementation, and evaluation of Hot Random Off-loading (HRO), a self-optimizing hybrid storage system that uses a fast and small SSD as a by-passable cache to hard disks, with a goal to serve a majority of random I/O accesses from the fast SSD. HRO dynamically...
Internet of things (IoT) has been researched in recently years. The Savant as a midware provides the data collecting and pre-processing for the IoT applications. Data grid can aggregate the resources in the IoT. Using data grid to build the Savant enables the Savant manage large scale data and optimizes the efficiency of the resources in IoT. In this paper, the data in the IoT is classified, and a...
In view of the current situation of the computer equipment in our library, use the fuzzy AHP method to comprehensive evaluate the advanced degree of computer equipment in our library, draw a conclusion: the advanced degree of computer equipment in our library is in the medium level, and propose the corresponding solutions to improve the situation.
Applications can be submitted as jobs in grid. Grid jobs usually comprise the scenarios of file stage-in, execution and file stage-out. These scenarios always run in batch mode. It leads to the waiting of the computational resource for data transfer and limits the performance of the grid application, especially when the application is data/communication intensive. Utilizing the file sharing function...
Power consumption is an increasingly impressing concern for data servers as it directly affects running costs and system reliability. Prior studies have shown most memory space on data servers are used for buffer caching and thus cache replacement becomes critical. Temporally concentrating memory accesses to a smaller set of memory chips increases the chances of free riding through DMA overlapping...
Security is one of the most important issues in grid computing. Therefore it is an inevitable function in most kinds of grid middleware to ensure the security of resource access. Efforts of this literature focus on file security in grid system. An architecture for file scan and monitoring is proposed on top of OGSA-based grid middleware as well as NFS, for the purpose of preventing the spread of virus...
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