云计算中的SLA管理技术研究

doi:10.3969／j.issn.1000-0801.2012.10.007

摘要/Abstract

摘要：

云计算环境中，用户的需求动态变化，云供应商不能掌控用户需求变化，但必须提供用户满意的服务质量，因此，QoS保证是云计算技术未来持续发展的关键。QoS保证通过SLA实现。本文综述了云计算SLA管理中的SLA指标分类、资源监测、SLA违例管理以及SLA参数映射技术的研究现状，最后指出了云计算中基于SLA的资源管理是未来的研究方向。

关键词: 服务等级协议, 资源监测, SLA违例检测, SLA违例避免, SLA映射, SLA管理

Abstract:

In cloud environment, customers' demands are changed and occurred autonomously and unpredictably, and they are out of control of the providers. Cloud providers have to meet the requirements. So, it is the key to enforce QoS guarantee for the future sustainable development of cloud computing technology, QoS guarantee is implemented by service level agreement enforcement. The SLA metrics classification in SLA management, resource metrics monitoring, and the SLA violation detection and avoidance management, SLA parameter mapping technologies are reviewed. Finally, the conclusion gives that the SLA-based resource management in cloud computing is the future direction of research.

Key words: service level agreement, resource monitoring, SLA violation detection, SLA violation avoidance, SLA mapping, SLA management

钱琼芬,李春林,熊家军,李强. 云计算中的SLA管理技术研究[J]. 电信科学, 2012, 28(10): 38-45.

Qiongfen Qian,Chunlin Li,Jiajun Xiong,Qiang Li. Towards SLA Management in Cloud Computing[J]. Telecommunications Science, 2012, 28(10): 38-45.

图/表 4

图1

表1

图2

表2

复杂的映射规则"

资源指标	SLA参数	映射规则
正常运行时间（uptime）停机时间（downtime）	可用性（A）	$A = 1 - \frac{d o w n t i m e}{u p t i m e}$
入比特（inbytes）出比特（outbytes）	响应时间（R_total）	R_total=R_in+R_out，其中， $R_{i n} = \frac{packetsize}{bandwidthin-inbytes} ，$
报文大小（packetsize）平均输入带宽（bandwithin）		$R_{o u t} = \frac{packetsize}{bandwidthin-outbytes}$
平均输出带宽（bandwithout）

表2

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SLA参数	SLA目标	SLA威胁阈值
可用性	98%	98.9%
响应时间	500ms	498.9ms
存储	100GB	102GB
输入带宽	50Mbit/s	52Mbit/s
输出带宽	100Mbit/s	102Mbit/s

[1]	徐晓峰,徐劲松. 一种混合云环境下SLA约束的云资源调度方法[J]. 电信科学, 2016, 32(2): 126-133.
[2]	郭平,冯婷莹. 基于变化周期和事件驱动的云计算资源监测模型[J]. 电信科学, 2012, 28(9): 38-42.