ITR/SY Collaborative Research: A Unified Relational Approach to Grid Information Services

ITR/SY 合作研究：网格信息服务的统一关系方法

• 批准号: 0112891
• 负责人: Peter Dinda
• 金额: $ 22.59万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-15 至 2005-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0112891&HistoricalAwards=false
• 关键词: ITR; SY; Collaborative; Research; Unified

An application running in a distributed computing environment such as the Computational Grid must adapt to the available hardware and software resources. This requires information about the properties of Grid resources such as hosts, network switches, links and paths, software libraries and systems, user and organization rights, software services, event channels and dictionaries, and more. The information needed for an application to run, the values of the information (how fast the information changes) and the freshness of the information (how fast updates must be pushed to the application) can vary dramatically. These attributes place significant demands on the resource information service, demands that are arising with increasing prevalence in the general area of directory services as well. The Grid Forum, an international standards body for world-wide Grid computing, is developing standards for representing and querying this information. There is much that is excellent about these evolving standards, but there are many forms of highly desirable queries that will be difficult or expensive to perform in these systems. In particular, dynamic information will require very high update rates not supported by LDAP-based implementations.This project will address these concerns through a proposed (and tentatively named) Grid Resource Information Service (GRIS), a unified relational approach to grid information services. The research will start with the full ACID (Atomicity/Consistency/Isolation/Durability) functionality of a relational database system and "build down" to a practical resource information system that still provides most of the benefits of the RDBMS. Such a system will provide a single highly flexible query model and language for all types of Grid resource information, no matter how dynamic. The research will culminate in an extensible implementation based on commodity database systems and the SQL language, including "canned queries" for non-SQL users. The project will evaluate the new system and techniques using logged updates and queries from an existing Grid information service, and comparing results with a hierarchical system such as Globus MDS2. To facilitate comparisons, the project will produce a set of benchmark queries from discussions with users, tool developers, and Grid Forum members, and will quantify the limits of these queries.

在分布式计算环境（例如计算网格）中运行的应用程序必须适应可用的硬件和软件资源。这需要有关网格资源属性的信息，例如主机、网络交换机、链接和路径、软件库和系统、用户和组织权限、软件服务、事件通道和字典等等。 应用程序运行所需的信息、信息的值（信息变化的速度）和信息的新鲜度（更新必须以多快的速度推送到应用程序）可能会有很大差异。这些属性对资源信息服务提出了很高的要求，这种要求也随着目录服务的一般领域的日益普及而出现。网格论坛是全球网格计算的国际标准机构，正在开发用于表示和查询此信息的标准。这些不断发展的标准有很多优点，但有许多形式的非常理想的查询在这些系统中执行起来很困难或昂贵。特别是，动态信息需要非常高的更新率，而基于 LDAP 的实现不支持这一点。该项目将通过提议的（暂时命名为）网格资源信息服务 (GRIS)（网格信息服务的统一关系方法）来解决这些问题。该研究将从关系数据库系统的完整 ACID（原子性/一致性/隔离性/持久性）功能开始，并“构建”为实用的资源信息系统，该系统仍然提供 RDBMS 的大部分优点。 这样的系统将为所有类型的网格资源信息（无论多么动态）提供单一的高度灵活的查询模型和语言。 该研究最终将实现基于商品数据库系统和 SQL 语言的可扩展实现，包括针对非 SQL 用户的“预设查询”。该项目将使用记录的更新和现有网格信息服务的查询来评估新系统和技术，并将结果与​​ Globus MDS2 等分层系统进行比较。为了便于比较，该项目将通过与用户、工具开发人员和网格论坛成员的讨论产生一组基准查询，并将量化这些查询的限制。