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Studies on Dependable Distributed Storage Cluster for SoC Design System using SAN/NAS

基于SAN/NAS的SoC设计系统可靠分布式存储集群研究

基本信息

批准号：
15500046
负责人：
FUKUMOTO Satoshi
金额：
$ 2.37万
依托单位：
Tokyo Metroplitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

The main purpose of our study has been the research and development of dependable computing techniques in order to construct the highly reliable distributed storage cluster for SoC design system using SAN/NAS. We focused on some element technology to obtain the following study results.1. Considering the situation that SAN/NAS is spreading over wide areas, we investigated the checkpointing and recovery schemes in distributed systems. We first presented the hybrid scheme between uncoordinated checkpointing and coordinated one by using the incremental snapshot. We secondary study the hybrid scheme between uncoordinated checkpointing and logging. Introducing the new ideas enabled us to generalize the evaluation model of a prior study.2. For highly reliable communication systems, convolutional code based dependable file transfer technique was examined. We presented (n, k, m) convolutional code based packet level FEC scheme and evaluated its packet recoverability and calculated amounts of encoding or decoding. Moreover, some works for the FEC were carried out : the recoverability analysis where the packet buffer size was restricted to finite ; retransmission protocols for hybrid ARQ scheme ; the relation between the generator matrix density and the post-reconstruction receiving rate ; and so on.3. On the assumption of distributed storage cluster for IP version maintenance, access protocols for read/write operations were discussed. The hybrid data replication protocol was generalized down to the trapezoid protocol we considered. The probabilistic quorum system was further introduced to our protocol. We finally inquired into the multi generational conservation protocol for SoC multi-generational IP version.

本课题的主要目的是研究和开发基于SAN/NAS的SoC设计系统的高可靠分布式存储集群的可靠计算技术。本文重点对几种元器件技术进行了研究，取得了以下研究成果.考虑到SAN/NAS的广泛应用，本文研究了分布式系统中的检查点和恢复机制。首先提出了一种基于增量快照的非协调检查点和协调检查点的混合方案。我们进一步研究了非协调检查点和日志记录的混合方案。引入新的思想使我们能够推广以前研究的评价模型。针对高可靠通信系统，研究了基于卷积码的可靠文件传输技术。提出了一种基于（n，k，m）卷积码的分组级FEC方案，并对该方案的分组可恢复性进行了评估，计算了其编解码量。此外，还对FEC进行了一些研究工作：分组缓冲区大小限制为有限时的可恢复性分析;混合ARQ方案的重传协议;生成矩阵密度与重构后接收速率的关系等.在IP版本维护的分布式存储集群的假设下，讨论了读/写操作的访问协议。将混合数据复制协议推广到梯形协议。在协议中进一步引入了概率仲裁系统。最后探讨了SoC多代IP版本的多代保存协议。