Experimental Software Systems: ISAC: Integrated System Support for Adaptive Communication and Computation Control in Clustered Environments

EIA-9806741 Grama，Ananth Y. 帕克，基洪普渡大学 ESS：ISAC：用于自适应通信和计算控制的集成系统支持 本项目旨在建立一个集成的软件系统（ISAC）， 集群计算环境中的应用程序开发。ISAC地址 通信控制和负载平衡问题，以促进 有效的并行平台。与传统方法相比，ISAC 在一个集成系统中查看通信和计算控制。它 动态地调度计算和通信， 重复性，以实现最佳性能。端到端拥塞 通过组通信机制来增强控制， 安排通信和计算。调度是在假设 一种尽力而为的网络环境，在这种环境中， 应用程序池。通信控制是自适应的，调度是 根据网络状态动态执行。假设路由器 实现加权公平排队形式，其中资源预留可以 受影响，ISAC实施带宽共享通道， 每个连接或每个多播组使用一种形式的准入控制。在 与主机站的进程调度支持相结合， 关键应用程序，以实现不受网络影响的有保证的进度 和处理器负载。它还允许应用程序处理异构性 在主机和网络环境之间透明地进行。ISAC将 显著增强可编程性和性能， 集群计算应用，从科学计算到 分布式Web和数据库服务器。

EIA-9806741 Grama, Ananth Y. Park, Kihong Purdue University ESS: ISAC: Integrated System Support for Adaptive Communication and Computation Control in Clustered Environments This project aims to build an integrated software system (ISAC) for application development in cluster-computing environments. ISAC addresses issues of communication control and load balancing to facilitate an effective parallel platform. In contrast to traditional approaches, ISAC views communication and computation control in an integrated system. It dynamically schedules computation and communication making use of their repetitive nature to achieve optimal performance. End-to-end congestion control is augmented by a group communication mechanism that conjointly schedules communication and computation. Scheduling is carried out assuming a best-effort network environment in which resources are shared among a pool of applications. Communication control is adaptive, and scheduling is performed dynamically as a function of network state. Assuming that routers implement a form of weighted fair queuing wherein resource reservations can be affected, ISAC implements guaranteed-bandwidth channels either per-connection or per-multicast group using a form of admission control. In conjunction with process scheduling support at host stations, this allows critical applications to achieve guaranteed progress impervious to network and processor loads. It also allows applications to deal with heterogeneity among hosts and networking environments transparently. ISAC will significantly enhance the programmability and performance of cluster-computing applications ranging from scientific computing to distributed web and database servers.