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With supercomputer system scaling up, the performance gap between compute and storage system increases dramatically. The traditional speedup only measures the performance of compute system. In this paper, we firstly propose the speedup metric taking into account the I/O constraint. The new metric unifies the computing and I/O performance, and evaluates practical speedup of parallel application under...
Through analyzing the storage system requirements of supercomputer this paper designs a near-line storage system called NLSS based on the combination of HDFS (Hadoop distributed file system) and ZFS (Zettabyte file system). NLSS uses fat storage nodes (large storage servers) to build near-line storage clusters based on HDFS, and uses the ZFS file system to further enhance HDFS. NLSS effectively reduces...
The performance gap between computation and storage in HPC systems is enlarged with the rapid increase of compute scale. Client-side file caching has been proved to be an effective technique to improve I/O performance in parallel file system adopted by HPC systems. Current cache frameworks mainly focus on local thread access frequency, which suffers from cache inefficiency problems for the lack of...
With the amount of data growing constantly and exponentially, the industry has encountered an unprecedented challenge of efficiently and reliably processing a tremendous amount of data. High performance computer has played a major role in the field of big data processing for its serious computational power and super-large storage. However, it remains some inevitable drawbacks to efficiently utilize...
Heterogeneous devices with large displays have become popular in people lives. While conveying public information, most of them are lack of support for human interaction. This paper proposes a cross device interaction system for users to conveniently manipulate the content on public displays through personal mobile terminals with cameras. Users acquire, insert, and act on elements of the displayed...
Internet has played an important part in the success of information technologies. With growing and changing demands, there are many limitations faced by current Internet. A number of network test beds are created for solving a set of specific problems in Internet. Traditionally, these test beds are lacking of large scale network and flexibility. Therefore, it is necessary to design and implement a...
In order to respond to sudden environmental pollution incidents and reduce their damage and loss, an emergency decision-making system need to be built. The air pollution emergency plan system based on WebGIS, which relies on the on-site monitoring data in real time, simulates the spread and distribution of the on-site pollutants to assist decision-makers to make an appropriate emergency plans. Among...
Driven by continuing scaling of Moore's law, computer system becomes more and more complicated. The Network application technology of the computer is a basic course in computer architecture. Computer assisted teaching system is used to make the students understand the Network application technology of the computer more easily. A multimedia teaching system is introduced in this paper. The system consists...
DRM is becoming more and more important for P2P live streaming. In this paper, a manageable overlay network architecture with DRM, is proposed for live streaming. The system consists of register server, index servers, supernodes and peers. The register server authorizes the peers, assign the key and index server list; The index server acts as the centralized index server to store the peer list, program...
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