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Peer-to-Peer(P2P)-based Video-on-Demand application has gained more attentions recently. Due to the system complexity, there are still many challenges for practical deployment such as peer selection. Previous works focused on how to find the most suitable service or the request response scheme on the peer-side. In this paper, we study the request response scheme on the server-side by discussing three...
Data centers are considered as the indispensable infrastructure for cloud services nowadays. However, large-scale data centers use the traditional TCP protocol may experience performance issues, such as TCP incast. TCP incast is caused by the deficiency of TCP works for many-to-one traffic patterns on high-bandwidth, low-latency networks. In this paper, we propose a new TCP variant named Threshold...
Data centers are well known to consume a large amount of energy. As databases are one of the major applications in a data center, building energy-aware database systems has become an active research topic recently. The quantification of the energy cost of database systems is an important task in design. In this paper, we report our recent efforts on this issue, with a focus on the energy cost estimation...
With the rapid deployment of M2M services, countless smart “things” with sensing and communication capabilities are collecting data about the physical world we live in. These data can be used by various service providers to make their services more customized with high quality. On the other hand the availability of personal information raises serious concerns over individual privacy. In order to prevent...
Cloud storage systems take advantage of distributed storage technology and virtualization technology, to provide virtual machine clients with customizable storage service. They can be divided into two types: distributed file system and block level storage system. Orthrus is a Light weighted Block-Level Cloud Storage System, which adopt multiple volume servers' architecture to avoid single-point problem...
With the total energy consumption of computing systems increasing in a steep rate, much attention has been paid to the design of energy-efficient computing systems and applications. So far, database system design has focused on improving performance of query processing. The objective of this study is to experimentally explore the potential of power conservation in relational database management systems...
Due to the geospatial services based on Grid can not only make full use of spatial resources, but also manage all the resources in a uniform way, that is becoming the future of geospatial information services development. The paper analyses the needs and OGC Web Services' limits between grid and geospatial services combination, and gives an implementation of geospatial services in the environment...
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