【摘要】 为解决异地、异构、海量天文数据无缝透明地统一访问,中国虚拟天文台(China-VO)研究小组自主设计并开发了一套解决方案——虚拟天文台数据访问系统(VO-DAS)。着重从执行流程、设计模式、Session机制、生命周期、资源销毁、异常处理等模块详细阐述了该系统的任务调度设计。为了验证该系统的可行性和性能,最后描述了多个天文科学范例。更多还原

【Abstract】 In order to achieve integrated seamless access to massive allopatric and heterogeneous astronomical data resources,the China-VO team has designed and implemented a set of their own programs,the Virtual Observatory Data Access System(VO-DAS).This paper mainly presents the design of the job scheduling of this system,specifically in the aspects of work-flow,design-pattern,session-management,lifecycle,resource destruction,and exception-handling modules.The paper finally describes several applications of this system in astronomy.更多还原