Disk mirroring or RAID1 is a popular paradigm to achieve fault tolerance and high reliability, this paper describes four mirrored disk organizations: basic mirroring, group rotate declustering, interleaved declusterin...
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Disk mirroring or RAID1 is a popular paradigm to achieve fault tolerance and high reliability, this paper describes four mirrored disk organizations: basic mirroring, group rotate declustering, interleaved declustering, chained declustering, then the membership function of the states is defined and the reliability of mirrored disk system is analyzed by using the reliability theory based on fuzzy state.
This paper analyzes cache coherency mechanism from the view of system. It firstly discusses caehe-memory hierarchy of Pentium Ⅲ SMP system, including memory area distribution, cache attributes control and bus transac...
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This paper analyzes cache coherency mechanism from the view of system. It firstly discusses caehe-memory hierarchy of Pentium Ⅲ SMP system, including memory area distribution, cache attributes control and bus transaction. Secondly it analyzes hardware snoopy mechanism of P6 bus and MESI state transitions adopted by Pentium Ⅲ. Based on these, it focuses on how muhiprocessors and the P6 bus cooperate to ensure cache coherency of the whole system, and gives the key of cache coherency design.
This paper researches a programmable signal device by an improved direct digital frequency synthesis technology on DSP and FPGA to simulate servo signal for read-write channel of micro hard disk. This device has wide ...
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ISBN:
(纸本)0769526519
This paper researches a programmable signal device by an improved direct digital frequency synthesis technology on DSP and FPGA to simulate servo signal for read-write channel of micro hard disk. This device has wide frequency range from 1Hz to 10MHz, high frequency resolution of 0.001Hz, high precision of frequency, phase and amplitude of output wave, good reliability, little distortion. Compared with general devices, this device can generate all kinds of servo signal, and circuit is simply, reliable, and programmable.
storagesystems 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 sys...
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ISBN:
(纸本)0769526519
storagesystems 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 storagesystems. 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.
High performance, high bandwidth, and scalable network storagesystem is the requirement tendency of most data-intensive applications. Distributed RAID, as a storage architecture, is widely used in cluster and distrib...
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The security of multimedia data in digital network is commonly provided by encryption. Nevertheless, most current modern encryption algorithms, which only transform a plaintext message that is the simplest form of mul...
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ISBN:
(纸本)0769526519
The security of multimedia data in digital network is commonly provided by encryption. Nevertheless, most current modern encryption algorithms, which only transform a plaintext message that is the simplest form of multimedia data into unintelligible ciphertext, are not appropriate for higher forms such as images and video with very large file sizes. Selective encryption of MPEG video streams has been proposed to reduce encryption requirements, saving in complexity and facilitating new system functionality. In this paper, a two-way selective encryption algorithm (TWAEA) for MPEG video is proposed to compromise the security and speed in the process of encryption.
The ever growing storage demands of modern applications cultivate a promising area of storagesystem management, centered upon metadata servers. Some of the works are done at the file system level, which care little a...
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The I/O routine in network storage has longer transferring time and overhead than local I/O. To well make use of the storage network bandwidth and meet demand of concurrent I/O requests, we need to find the appropriat...
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ISBN:
(纸本)0769526519
The I/O routine in network storage has longer transferring time and overhead than local I/O. To well make use of the storage network bandwidth and meet demand of concurrent I/O requests, we need to find the appropriate schedule policy for I/O requests at the level of the network. The focus in the paper is on how to schedule concurrent I/O data transferring in share storage network, and to improve performance such as the response time affected by scheduling method. Our objective is to analysis the response time of concurrent requests as function their schedule order such as the sequenced, parallel and hybrid policies. We then verify our results by both the analytical method and experiment.
Object replication is an important and sophisticated question, it can reduce access latency and bandwidth consumption, replication can also help in load balancing and can improve reliability by creating multiple repli...
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storagesystems 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 sys...
详细信息
storagesystems 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 storagesystems. 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
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