Top Document: Comp.os.research: Frequently answered questions [3/3: l/m 13 Aug 1996] Previous Document: [1.1] What is the current status of the (insert name) project? Next Document: [1.3] Fault tolerance in distributed systems See reader questions & answers on this topic! - Help others by sharing your knowledge From: Distributed systems Load-balancing policy falls into two broad groups: static and dynamic. Static policies use algorithms which operate without regard to run-time loads across a system, while dynamic policies use the run-time performance of various parts of a system in order to make more `informed' decisions about balancing. [92-11-06-12-53.57] A dynamic load-balancing policy is one which uses run-time state information in making scheduling decisions. There are two kinds of dynamic policies: adaptive and non-adaptive. The latter always use the same (fixed, load-dependent) policy; the former may adjust policy parameters in order to gradually improve their performance. The key point is that while non-adaptive policies use only the information about the run-time state, adaptive policies use, in addition to this, information about current performance. In adaptive policies, the rules for adjusting policy parameters may be static or dynamic. An example of the former might be: `shift to a conservative migration rule when system-wide load patterns are varying too rapidly'. An example of the latter could be: `increase sender-side threshold when migrated jobs cause slowdown rather than speedup'. Some researchers refer to the performance-driven adaptation exhibited by the second policy as `learning'. Since both non-adaptive policies and adaptive policies with static rules really use only load information, it is confusing to distinguish between them. One way to avoid such confusion is to restrict the use of the word `adaptive' to policies that use performance feedback in order to drive their adjustment of policy parameters. User Contributions: 1 UoowNen ⚠ Sep 24, 2021 @ 7:07 am buy zithromax online https://zithromaxazitromycin.com/ - buy zithromax online zithromax online https://zithromaxazitromycin.com/ - buy zithromax Comment about this article, ask questions, or add new information about this topic:Top Document: Comp.os.research: Frequently answered questions [3/3: l/m 13 Aug 1996] Previous Document: [1.1] What is the current status of the (insert name) project? Next Document: [1.3] Fault tolerance in distributed systems Part1 - Part2 - Part3 - Single Page [ Usenet FAQs | Web FAQs | Documents | RFC Index ] Send corrections/additions to the FAQ Maintainer: os-faq@cse.ucsc.edu
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