Dr. Jiguang Wan Profile

Dr. Jiguang Wan

at HUST

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Publications (5)

Proceedings Article | 20 March 2009 Paper

The research and design for a high availability object storage system

Ling Zhan, Zhihu Tan, Peng Gu, Jiguang Wan

Proceedings Volume 7125, 71251M (2009) https://doi.org/10.1117/12.822571

KEYWORDS: Computing systems, Reliability, On-screen displays, Computer programming, Data storage, Binary data, Computer science, Tolerancing, Structural design, Manufacturing

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With the growing scale of the computer storage systems, the likelihood of multi-disk failures happening in the storage systems has increased dramatically. Based on a thorough analysis on the fault-tolerance capability on various existing storage systems, we propose a new hierarchical, highly reliable, multi-disk fault-tolerant storage system architecture: High Availability Object Storage System (HAOSS). In the HAOSS, each object has an attribute field for reliability level, which can be set by the user according to the importance of data. Higher reliability level corresponds to better data survivability in case of multi-device failure. The HAOSS is composed of two layers: the upper-layer and the lower-layer. The upper-layer achieves the high availability by storing multiple replicas for each storage object in a set of storage devices. The individual replicas can service the I/O requests in parallel so as to obtain high performance. The lower-layer deploys RAID5, RAID6 or RAID_Blaum coding schemes to tolerate multi-disk failures. In addition, the disk utilization rate of RAID_Blaum is higher than that of multiple replicas, and it can be further improved by growing the RAID group size. These advantages come at the price of more complicated fault-tolerant coding schemes, which involve a large amount of calculation for encoding and cause an adverse impact on the I/O performance, especially on the write performance. Results from both our internal experiments and third-party independent tests have shown that HAOSS servers have better multi-disk- failure tolerance than existing similar products. In a 1000Mb Ethernet interconnection environment, with a request block size of 1024KB, the sequential read performance for a HAOSS server reaches 104MB/s, which is very close to the theoretical maximum effective bandwidth of Ethernet networks. The HAOSS offers a complete storage solution for high availability applications without the compromises that today's storage systems require in either performance or fault-tolerance.

Proceedings Article | 20 March 2009 Paper

A virtual network computer's optical storage virtualization scheme

Jianzong Wang, Huaixiang Hu, Jiguang Wan, Peng Wang

Proceedings Volume 7125, 712516 (2009) https://doi.org/10.1117/12.822626

KEYWORDS: Optical storage, Data storage, Computer networks, Computing systems, Data storage servers, Embedded systems, Optical networks, Network architectures, Computer architecture, System on a chip

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Proceedings Article | 15 September 2005 Paper

Design and implement of remote CD mirror system based on third-party transferring

Jianzhong Huang, Changsheng Xie, Jiguang Wan

Proceedings Volume 5966, 59662A (2005) https://doi.org/10.1117/12.649833

KEYWORDS: Mirrors, Compact discs, Data storage, Chlorine, Telecommunications, Data communications, Data storage servers, Computing systems, Lithium, Data modeling

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Proceedings Article | 15 September 2005 Paper

Design and performance evaluation of a disk array controller with fibre channel interface

Xiaoming Dong, Changsheng Xie, Ruifang Liu, Jiguang Wan

Proceedings Volume 5966, 59662B (2005) https://doi.org/10.1117/12.649834

KEYWORDS: Prototyping, Human-machine interfaces, Multimedia, Databases, Detection and tracking algorithms, Operating systems, Computer architecture, Software development, Computer science, Data storage

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Proceedings Article | 15 September 2005 Paper

VCL: a high performance virtual CD library server

Jiguang Wan, ChangSheng Xie, Zhihu Tan

Proceedings Volume 5966, 59662C (2005) https://doi.org/10.1117/12.649836

KEYWORDS: Compact discs, Mirrors, Video, Cadmium, Network architectures, Operating systems, Internet, Patents, Digital video discs

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