本文介绍了Concert2负载共享方案的设计，该方案适用于松耦合的分布式系统。它基于详细的任务行为模型，生成大量信息，任务资源需求以详细的签名形式存储，并在任务完成时更新。系统通过CPU、内存、磁盘和网络资源的负载指标来表示节点的负载。设计了记录这些信息的机制，以最小化相关开销。Concert2完全分布式，其丰富的信息基础实现了自动化和对用户及应用的透明性。该方案的发展部分动机是对不同信息量和不同使用方式下的负载共享策略的成本和效益进行深入研究。
【摘要】
This paper presents the design of the Concert2 loadrnsharing scheme for loosely-coupled distributed systems.rnA popular trend in load sharing is to use limitedrnamounts of information in scheduling. Existing loadrnsharing schemes are briefly discussed in the context of therntype and amount of information they use in scheduling.rnConcert2 is based on a detailed model of processrnbehavior and generates large amounts of information. Thernresource requirements of tasks are stored in the form ofrndetailed signatures that are updated each time a taskrncompletes. In this way the behavior of each type of task isrnlearnt. The load level at processing nodes is representedrnas a collection of load metrics. The load on the CPU,rnmemory, disk and network resources is recorded. Thernmechanisms that record this information have beenrncarefully designed to minimize the associated overheads.rnThe scheme is totally distributed. Through its richinformationrnbasis, Concert2 achieves automation andrntransparency to users and applications.rnThe development of Concert2 has been motivated inrnpart by the desire to carry out a detailed investigation ofrnthe costs and benefits of using different amounts ofrninformation, and using the information in different ways,rnin load sharing policies.
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