Query-Based Visualization of Executing Distributed Computations

9619831基于查询的可视化是理解分布式计算的一种新颖的探索性方法。该方法的关键特征是使用查询作为搜索分布式计算的状态空间的设备、借鉴于程序动画的可视化表示技术，以及使用可视化交互在状态空间中导航的能力。基于查询的可视化处理正在运行的分布式计算的状态，就好像它是分布式数据库的内容一样。用户通过发出查询来浏览这个数据库，查询被评估，结果被可视化。一类名为persistent的查询可以对分布式计算的状态进行连续的可视化监控。所有视图都对应于计算的全局一致快照。该项目将产生第一个基于查询的可视化实现，它将为学习使用PVM库的分布式应用程序提供统一的接口。在开发过程中，将对监控和快照算法、图形表示形式及其组合方式以及可视化查询语言做出贡献。* * *

9619831 Query-based visualization is put forth as a novel exploratory approach to understanding distributed computations. The key features of the approach are the use of queries as a device for searching the state space of distributed computations, visual presentation techniques borrowed from program animation, and the ability to navigate through the state space using visual interactions. Query- based visualization treats the state of a running distributed computation as if it were the contents of a distributed database. The user explores this database by issuing queries which are evaluated and the results visualized. A class of queries called persistent enable continuous visual monitoring of the state of a distributed computation. All views correspond to globally consistent snapshots of the computation. The project will produce the first implementation of query-based visualization which will provide a uniform interface for learning about distributed applications that employ the PVM library. In the course of development, contributions will be made to monitoring and snapshot algorithms, graphical representation forms and ways to combine them, and the visual query language. ***