Increasing Spot Instances Reliability Using Dynamic Scalability

2012 IEEE Fifth International Conference on Cloud Computing Pub Date : 2012-06-24 DOI:10.1109/CLOUD.2012.58

W. Dawoud, I. Takouna, C. Meinel

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引用次数: 12

Abstract

Traditionally, Infrastructure as a Service (IaaS)providers deliver their services as Reserved or On-Demand instances. Spot Instances (SIs) is a complementary service that allows customers to bid on the free capacity at the provider data centers. Therefore, the decrease in the free capacity may result in terminating instances abruptly. To ensure fair trading, the provider does not charge customers for the interrupted partial hours. However, SIs price history traces analysis shows that uncharged time could rise up to 30% of the instance total run time, which means a reduction in the provider's profit. In this paper, we propose Elastic Spot Instances (ESIs) approach. It is a trade-off between the price and the total run time, where instead of abruptly terminating the SIs, the provider scales down their capacity proportionally to the increase in the price. Our approach delegates the task of interrupting the instances into the customers, but at the same time keeps the control on the provider side to isolate SIs' impact on the other services at overloaded time. Our approach doesn't imply an additional overhead or complex modification to current IaaS, while it consumes interfaces that are available by most of nowadays virtualization technologies.

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使用动态可伸缩性提高现场实例的可靠性

传统上，基础设施即服务(IaaS)提供商将其服务作为保留或按需实例交付。Spot Instances (si)是一项补充服务，允许客户对提供商数据中心的免费容量进行投标。因此，空闲容量的减少可能导致实例突然终止。为了确保公平交易，供应商不向客户收取中断部分时间的费用。然而，si的价格历史跟踪分析显示，未充电时间可能会上升到实例总运行时间的30%，这意味着提供商的利润会减少。在本文中，我们提出了弹性点实例(ESIs)方法。这是价格和总运行时间之间的一种权衡，提供商不是突然终止si，而是根据价格的增加按比例缩减其容量。我们的方法将中断实例的任务委托给客户，但同时将控制权保留在提供者端，以便在过载时隔离si对其他服务的影响。我们的方法并不意味着增加额外的开销，也不意味着对当前IaaS进行复杂的修改，而它所使用的接口是目前大多数虚拟化技术都可以使用的。

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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2012 IEEE Fifth International Conference on Cloud Computing

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