An Online Algorithm Based on Replication for Using Spot Instances in IaaS Clouds

IF 1.2 3区计算机科学 Q4 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Journal of Computer Science and Technology Pub Date : 2024-01-30 DOI:10.1007/s11390-023-1535-4

Zhi-Wei Xu, Li Pan, Shi-Jun Liu

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引用次数: 0

Abstract

Infrastructure-as-a-Service (IaaS) cloud platforms offer resources with diverse buying options. Users can run an instance on the on-demand market which is stable but expensive or on the spot market with a significant discount. However, users have to carefully weigh the low cost of spot instances against their poor availability. Spot instances will be revoked when the revocation event occurs. Thus, an important problem that an IaaS user faces now is how to use spot instances in a cost-effective and low-risk way. Based on the replication-based fault tolerance mechanism, we propose an online termination algorithm that optimizes the cost of using spot instances while ensuring operational stability. We prove that in most cases, the cost of our proposed online algorithm will not exceed twice the minimum cost of the optimal offline algorithm that knows the exact future a priori. Through a large number of experiments, we verify that our algorithm in most cases has a competitive ratio of no more than 2, and in other cases it can also reach the guaranteed competitive ratio.

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基于复制的在线算法，用于在 IaaS 云中使用现货实例

基础设施即服务（IaaS）云平台提供多种购买方式的资源。用户可以在稳定但昂贵的按需市场上运行实例，也可以在折扣较大的现货市场上运行实例。不过，用户必须仔细权衡现货实例的低成本和低可用性。当撤销事件发生时，现货实例将被撤销。因此，IaaS 用户目前面临的一个重要问题是如何以低成本、低风险的方式使用现货实例。基于基于复制的容错机制，我们提出了一种在线终止算法，在确保运行稳定性的同时优化了使用现货实例的成本。我们证明，在大多数情况下，我们提出的在线算法的成本不会超过事先知道确切未来的最优离线算法最低成本的两倍。通过大量实验，我们验证了我们的算法在大多数情况下竞争率不超过 2，在其他情况下也能达到保证的竞争率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Computer Science and Technology 工程技术-计算机：软件工程

CiteScore

4.00

自引率

0.00%

发文量

2255

审稿时长

9.8 months

期刊介绍： Journal of Computer Science and Technology (JCST), the first English language journal in the computer field published in China, is an international forum for scientists and engineers involved in all aspects of computer science and technology to publish high quality and refereed papers. Papers reporting original research and innovative applications from all parts of the world are welcome. Papers for publication in the journal are selected through rigorous peer review, to ensure originality, timeliness, relevance, and readability. While the journal emphasizes the publication of previously unpublished materials, selected conference papers with exceptional merit that require wider exposure are, at the discretion of the editors, also published, provided they meet the journal''s peer review standards. The journal also seeks clearly written survey and review articles from experts in the field, to promote insightful understanding of the state-of-the-art and technology trends. Topics covered by Journal of Computer Science and Technology include but are not limited to: -Computer Architecture and Systems -Artificial Intelligence and Pattern Recognition -Computer Networks and Distributed Computing -Computer Graphics and Multimedia -Software Systems -Data Management and Data Mining -Theory and Algorithms -Emerging Areas