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Seventh International Symposium on Optical storage, ISOS 2005

作者： Wan, Jiguang Xie, Changsheng Tan, Zhihu Key Laboratory of Data Storage System Huazhong University of Science and Technology Wuhan 430074 China

With the increasing of CD data in internet, CD mirror server has become the new technology. Considering the performance requirement of the traditional CD mirror server, we present a novel high performance VCL (Virtual CD Library) server. What makes VCL server superior is the two patented technologies: a new caching architecture and an efficient network protocol specifically tailored to VCL applications. VCL server is built based on an innovative caching technology. It employs a two-level cache structure on both a client side and the server side. Instead of using existing network and file protocols such as SMB/CIFS etc that are generally used by existing CD server, we have developed a set of new protocols specifically suitable to VCL environment. The new protocol is a native VCL protocol built directly on TCP/IP protocol. VCL protocol optimizes data transfer performance for block level data as opposed to file system level data. The advantage of using block level native protocol is reduced network-bandwidth requirement to transfer same amount of data as compared to file system level protocol. Our experiment and independent testing have shown that VCL servers allow much more number of concurrent users than existing products. For very high resolution DVD videos, VCL with 100Mbps NIC supports over 10 concurrent users viewing the same or different videos simultaneously. For VCD videos, the same VCL can support over 65 concurrent users viewing videos simultaneously. For data CDs, the VCL can support over 500 concurrent data stream users.

关键词： Compact disks

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Research of the Streaming Media system Architecture Based on Net-RAID

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Wuhan University Journal of Natural Sciences 2003年第4A期8卷 1081-1084页

作者： Deng Yu-hui, Zhang Jiang-ling, Feng Dan key laboratory of data storage system,Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074,Hubei, China Huazhong University of Science and Technology Key Laboratory of Data Storage System Ministry of Education Wuhan Hubei China (GRID:grid.33199.31) (ISNI:***)

In the typical streaming media system, the streaming media server is system bottleneck with the expansion of Internet subscribers. This paper proposes an innovational high performance streaming media system architecture (HPSMS) based on the logical separation of streaming media transport protocol. The system avoids expensive store-and-forward data copies between streaming media server and storage devices, improves the system performance greatly. The system bandwidth continuously increases with the expansion of storage system capacity is the highlight. The performance of the proposed HPSMS is evaluated through a practical prototype implementation.

关键词： streaming media system RTP/RTCP system architecture Net-RAID

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Cache blocks: An efficient scheme for solid state drives without DRAM cache

Cache blocks: An efficient scheme for solid state drives wit...

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IEEE International Conference on Networking, Architecture and storage

作者： Wu, Fei Chen, Xiang Wan, Jiguang Key Laboratory of Data Storage System School of Computer Science and Technology Huazhong University of Science and Technology Wuhan Hubei 430074 China Division of Data Storage System Wuhan National Laboratory for Optoelectronics China

ISBN: (纸本)9780769541341

Most solid state drives use DRAM for device's cache, the volatile memory provides the I/O Caching ability, and maintains the drives' mapping table (indicates the correspondence between physical unit and logical unit). However, when the drives' power shut down unexpected, the volatile DRAM memory may lose the caching data, which did not have time to write to the drives' storage media, so the dirty data generated. This paper proposes an efficient management scheme for low cost Solid State Drives, with low cost ASIC controller chip, only has internal SRAM memory, and no external DRAM. We use a kind of Cache Blocks: when write requests come, write in these areas first, and write in the sequentially physical place, and the limited internal SRAM for the mapping tables maintaining and data transferring. We propose some efficient methods: 1)using flash memory as cache, 2) page mapping for cache blocks regions, block mapping for data blocks regions, 3) binding two planes operation, 4) using the idle internal plane SRAM as data buffer to improve the I/O performance, without DRAM. So we avoid the dirty data when the power loses unexpected. And this scheme is energy-efficient and low cost. We test the scheme on our own SSD test board, with the pool SRAM size, the I/O performances do not decrease two much, and the random write even better about 20%, compare to the SSD with DRAM. The experiment also shows, this scheme cuts about 21% energy than the DRAM architecture. And it may be adapted in consumer electronics area. © 2010 IEEE.

关键词： Dynamic random access storage

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TERMS: Task management policies to achieve high performance for mixed workloads using surplus resources

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Journal of Parallel and Distributed Computing 2022年第0期170卷 74-85页

作者： Yu, Jinyu Tong, Wei Lv, Pengze Feng, Dan Wuhan National Laboratory for Optoelectronics Key Laboratory of Information Storage System Engineering Research Center of Data Storage Systems and Technology School of Computer Science and Technology Huazhong University of Science and Technology Ministry of Education of China Hubei Wuhan China

Resource contentions and performance interferences can lead to workload performance degradation in mixed-workload deployment clusters. Previous work guarantees the resource requirements of latency-sensitive tasks and reduces performance losses to batch jobs by reclaiming surplus resources from over-provisioned tasks. While the fragmentation of resources leads to a mismatch between provisioned resources and task requirements, resulting in high operation overheads and losses of task fairness. This paper proposes TERMS, the task management policies based on task relevance, resource distribution, and task fairness to achieve efficient and low-cost task management. TERMS mainly includes three types of management policies. The task scheduling policy can schedule new tasks according to task relevance. Task selection strategies select tasks for resource provisioning and task resumption based on resource requirements and task fairness. If necessary, the node selection strategy can be used to choose befitting target nodes based on task relevance and node resource information for task migration when eliminating straggler tasks. Evaluation results show that TERMS can further improve the performance of latency-sensitive services and batch jobs, reduce management overheads, and avoid operation failures. © 2022 Elsevier Inc.

关键词： Scheduling

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Queue network modeling approach to analysis of the optimal stripe unit size for disk arrays under synchronous I/O workloads

Queue network modeling approach to analysis of the optimal s...

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2006 International Workshop on Networking, Architecture, and storages, NAS'06

作者： Ming, Wu Dong, Xiao-Ming Li, Huai-Yang Key Laboratory of Data Storage System School of Computer Science and Technology Huazhong University of Science and Technology

ISBN: (纸本)0769526519

storage systems represent a growing market. In recent years there has been an explosion of applications that use enormous amounts of data. Disk arrays are today's standard solution for enterprise class storage systems. One of the most crucial parameters in designing a disk array is the size of the striping unit. The paper presents and validates a performance model for RAID level 5. The model is created as a closed fork-join queue network (CFJQN) under synchronous I/O workloads. It can be used to compute the optimal strip unit size for disk arrays.

关键词： Queueing networks

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FPGA/ASIC based cryptographic object store system

FPGA/ASIC based cryptographic object store system

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3rd Internationl Symposium on Information Assurance and Security, IAS 2007

作者： Dan, Feng Lanxiang, Chen Lingfang, Zeng Zhongying, Niu Key Laboratory of Data Storage System Huazhong University of Science and Technology Ministry of Education Wuhan China

ISBN: (纸本)0769528767

To avoid re-encryption in cryptographic storage system when revoking users, Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) hardware module have been introduced to a cryptographic object store system, let private key never leave the hardware module and symmetric key only exist in hardware module in plaintext. Anyone doesn't know private or symmetric key, so when revoking users, it just needs to modify access control list (ACL) to delete the privileges of the users. To facilitate file sharing and key management, group is adopted. In our system, almost all computationally expensive cryptographic operations are through FPGA/ASIC hardware module. Once creator revokes some users, objects don't need re-encryption. How to use ACL and FPGA/ASIC hardware module to authenticate and authorize are described. And the procedure of object store and the distribution of meta-data are detailed. Finally, a cryptographic object store prototype system is implemented with tested and effective performance. © 2007 IEEE.

关键词： Digital storage

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IRBO: Intelligent role-based object for object-based storage device

IRBO: Intelligent role-based object for object-based storage...

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2007 International Conference on Computational Intelligence and Security, CIS'07

作者： Yinliang, Yue Fang, Wang Dan, Feng Key Laboratory of Data Storage System Huazhong University of Science and Technology Ministry of Education Wuhan China

ISBN: (数字)9780769530727

ISBN: (纸本)0769530729

The intelligence of Object-based storage Device (OSD) is crucial for an autonomous Object-based storage Device Cluster (OSDC) and the intelligence of OSD depends on the intelligent Objects. Traditionally, object defined in OSD-2 draft is the container of data and attributes (such as user object) and lacks for intelligence which is the basis of an intelligent OSD. Consequently, the construction of an intelligent object will catch the fancy of most researchers. The task of traditional object is similar to each other and some special tasks aren't taken by the specific objects. So some specific objects are urgent needed to be added into OSD for the special missions. This paper presents intelligent Role-Based Object (iRBO) for OSD. The construction of intelligent object is proposed firstly. Methods, rules, trigger and feed back mechanism are introduced into object defined in OSD-2 draft, so an object is comprised of data, attributes, methods, rules, trigger and feed back mechanism. After the relationship among these six components is built up, the object is no longer passive, but active. Then, the model of iRBO is discussed and some specific objects for special missions are introduced. © 2007 IEEE.

关键词： Virtual storage

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iOSDC: A novel autonomous intelligent OSD cluster

iOSDC: A novel autonomous intelligent OSD cluster

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2nd International Conference on Convergent Information Technology, ICCIT 07

作者： Yue, Yinliang Wang, Fang Feng, Dan Key Laboratory of Data Storage System Huazhong University of Science and Technology Ministry of Education Wuhan China

ISBN: (纸本)0769530389

As the requirement for Peta-scale massive storage system, Object-based storage Device (OSD) protocol has already been the mainstream in the next generation storage technology. However, in recent research, most actions in OSD remain the passive way, because of the request-driven model. As partial storage management functions are offloaded to OSD, the construction of an intelligent OSD has caught the fancy of most researchers. In this paper, we propose a novel autonomous intelligent OSD Cluster (iOSDC). In IOSDC, every OSD is intelligent, called intelligent OSD (iOSD) and all the objects are intelligent, called intelligent OBJECT (iOBJECT). Methods, rules, trigger and feed back mechanism are introduced into object defined in OSD-2 draft, so an object is comprised of data, attributes, methods, rules, trigger and feedback mechanism. After the relationship among these six components is built up, the object is no longer passive, but active. Furthermore, some specific objects are introduced into OSDs, these specific objects can enhance the intelligence of OSD. Collaboration of all the iOSDs gives birth to the intelligent OSD Cluster. Based on the requirements of iOSDC, some enhancements have been performed onto the T10 OSD-2 draft. © 2007 IEEE.

关键词： storage management

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Non-sequential striping encoder from replication to erasure coding for distributed storage system

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Frontiers of Computer Science 2019年第6期13卷 1356-1358页

作者： Yanwen XIE Dan FENG Fang WANG Lingling ZHANG Wuhan National Laboratory for Optoelectronics School of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Information Storage System Engineering Research Center of Data Storage Systems and TechnologyMinistry of Education of ChinaWuhan 430074China

1 Introduction and main contributions As so many machines are clustered in datacenters,failures occur frequently[1,2].Redundancy schemes,like replication and erasure coding,are deployed to store redundant data to tolerate *** distributed systems with these two redundancy schemes,new data are hot in replication,and usually turn cold as time goes *** encoder performing the conversion can cause large overheads on network and put data in low reliability when the encoder is not well designed.

关键词： strip redundant store

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iVISA: A framework for flexible layout block-level storage system

iVISA: A framework for flexible layout block-level storage s...

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20th International Conference on Advanced Information Networking and Applications

作者： Jianxi, Chen Dan, Feng Zhan, Shi Key Laboratory of Data Storage System Huazhong University of Science and Technology Ministry of Education Wuhan 430074 China

ISBN: (纸本)0769524664

High performance, high bandwidth, and scalable network storage system is the requirement tendency of most data-intensive applications. Distributed RAID, as a storage architecture, is widely used in cluster and distributed computing environments. But the data placement is mechanical and penalty for maintaining consistency is suffered. In this paper we propose a novel block-level storage architecture called iVISA (iSCSI based Virtual Interface storage Architecture) which employs the concepts both distributed RAID and virtualization storage. All storage resources distribute in a high performance VI network and are managed by a metadata server. A number of iSCSI target nodes act as the entrances of iVISA system for accessing through iSCSI connections. The storage resources are dynamically allocated to users during I/O accessing. The users' logical block addresses are intelligently and flexibly mapped to the physical block addresses based on the current workload of storage nodes and data layout. The evaluation result shows that better performance can be achieved by allocation and mapping dynamically and flexibly with optimized allocation strategy. A hybrid strategy considering both data layout and load of storage nodes has a 30% higher I/O performance than conventional distributed RAID. © 2006 IEEE.

关键词： Distributed computer systems

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