网格计算环境下的I/O支持机制的分析、改进与实现  

Analysis, Improvement and Implementation of I/O Support Mechanisms in Grid Computing Environments

作　　者：王彬[1] 徐国市[1] 罗引[1] 许卓群[1] 丁文魁[1] 

机构地区：[1]北京大学信息科学技术学院计算机科学技术系,北京100871

出　　处：《计算机科学》2004年第11期14-18,37,共6页Computer Science

基　　金：国家自然科学基金#60173004

摘　　要：在广域的网格计算环境下,计算所在站点常常远离相关的数据站点和用户控制台。因而网格计算环境下启动管理远处计算应用就要不可避免地考虑为其提供I/O支持(包括传入输入文件、传出输出文件,标准输入、标准输出和标准出错等3个特殊文件的处理)。网格计算环境的系统,如Condor,Legion和Globus等,都给出了各自的I/O解决方案。这些解决方案满足了启动远程计算对I/O机制的大多数的需要,已获得广泛的使用。但这些解决方案在设计时没有考虑到两个实际中的I/O需要——用户在计算过程中实时的标准输入和中间结果文件的实时传走,因而不能解决这两个实际需要。所以,本文提出了在网格计算环境下远程计算的I/O支持系统的改进的设计方案,并在GlobusToolkit的I/O解决方案基础之上给出了实现的参考方案。改进后的文件I/O机制能够更好地满足了广域的网格计算环境下计算应用的需要。In Grid computing environments,computation is often performed at a site distant from data needed and from user console. As a result,it inevitably involves providing I/O support for submission and management of computations at remote sites. Many Grid software providers, such as Condor, Legion,Globus,have implemented their own I/O solutions in their released packages. These solutions meet most requirements for I/O mechanisms and have seen wide application. But two important user requirements are not sufficiently addressed when designing these solutions, namely, run-time stdin from user console and real-time stage-out of scratched results files during the course of computation. Regarding these deficiencies,the paper puts forward an improved solution to I/O support mechanisms for remote job execution in Grid Computing environments. In addition,on the base of Globus Toolkit,the paper presents a reference implementation. Enhanced file I/O mechanisms will better serve the need of computing applications in Grid computing environments.

关 键 词：I/O 网格计算 文件 远程计算 解决方案 输入 实时 环境 中间 支持机制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TP316[自动化与计算机技术—计算机科学与技术]