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Design issues in networked intelligent storage systems: Performance and QoS.

机译：联网智能存储系统中的设计问题：性能和QoS。

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摘要

The explosive growth of the Internet and applications has been driving for high performance, scalable and reliable storages for data access. As a result of this, on one hand, network-enabled storage such as NAS, SAN, iSCSI and OSD are emerging and becoming popular. On the other hand, the storage devices are getting more intelligent. These new storage paradigms have created new design issues. In this thesis, we investigate two relaxed issues: performance and QoS provisioning of such infrastructure.;The performance issue is becoming important since the storage access is different from traditional data access for which the underlying networking protocol was designed. In this thesis, we first study the performance characteristics of iSCSI-based storage systems under different configurations and investigate the system bottleneck and the factors affecting the performance. Moreover, to facilitate the study of this emerging technology, we also investigate the modeling and simulation of iSCSI storage systems. We exploit the existing ns2 tool and incorporate these modeling to support iSCSI-based storage simulation. We validate this tool with the real measurement results. We also investigate the impact of several transport factors and iSCSI parameters to illustrate the usage of this tool.;We then examine the Quality of Service (QoS) issue, i.e. how to provide QoS support to the clients and client's applications in the networked storage system. QoS can provide certain service guarantees for the requests from clients. It also supports service differentiation among requests from different clients and applications. We first analyze the QoS requirements from a client applications' perspective, and then propose extensions to OSD protocol to incorporate the specification of QoS requirements.;We further work on the enforcement of QoS in the remote storage device. We propose a novel scheduling scheme to address the QoS requirements of client applications. In such scheme, we consider both the session's network bandwidth and the storage conditions. We also break down requests of large size into smaller size of appropriate size and schedule the requests based on network condition, current workload and request's deadline. In addition, we have also implemented such prototyping system and experimentally demonstrated its efficacy.
机译：Internet和应用程序的爆炸性增长一直在推动高性能，可扩展和可靠的数据访问存储。结果，一方面，诸如NAS，SAN，iSCSI和OSD之类的具有网络功能的存储正在兴起并流行。另一方面，存储设备变得越来越智能。这些新的存储范例带来了新的设计问题。在本文中，我们研究了两个轻松的问题：此类基础架构的性能和QoS设置。由于存储访问与设计了底层网络协议的传统数据访问不同，因此性能问题变得越来越重要。本文首先研究了基于iSCSI的存储系统在不同配置下的性能特征，并研究了系统瓶颈和影响性能的因素。此外，为了促进对这一新兴技术的研究，我们还研究了iSCSI存储系统的建模和仿真。我们利用现有的ns2工具，并合并这些建模以支持基于iSCSI的存储仿真。我们用实际的测量结果验证该工具。我们还研究了几种传输因素和iSCSI参数的影响，以说明此工具的使用。；然后，我们研究了服务质量（QoS）问题，即如何为网络存储系统中的客户端和客户端应用程序提供QoS支持。 。 QoS可以为来自客户端的请求提供某些服务保证。它还支持来自不同客户端和应用程序的请求之间的服务区分。我们首先从客户端应用程序的角度分析QoS要求，然后提出OSD协议的扩展以纳入QoS要求的规范。;我们进一步致力于在远程存储设备中实施QoS。我们提出了一种新颖的调度方案来解决客户端应用程序的QoS要求。在这种方案中，我们同时考虑了会话的网络带宽和存储条件。我们还将大尺寸的请求分解为适当大小的较小的大小，并根据网络状况，当前工作量和请求的截止日期安排请求。此外，我们还实施了这种原型系统并通过实验证明了其有效性。

著录项

  • 作者

    Lu, Yingping.;

  • 作者单位

    University of Minnesota.;

  • 授予单位 University of Minnesota.;
  • 学科 Computer Science.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 161 p.
  • 总页数 161
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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