Need for speed? On quality of experience for file storage services

Need for speed? On quality of experience for file storage services
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发表时间：
2013
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通讯作者：
P. Casas
P. Casas
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作者：
Philipp Amrehn;Karel Vandenbroucke;Tobias Hossfelt;K. Moor;Matthias Hirth;R. Schatz;P. Casas

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云计算正受到来自各个学科的研究人员越来越多的关注。然而，到目前为止，只有少数研究从最终用户的角度调查云服务的体验质量（QoE），包括Dropbox或Livedrive等个人文件存储服务。本文的贡献是一种方法和四个不同的用户研究的结果，对一个情景QoE模型的文件存储服务。为了深入了解现有的使用实践，并检测可能的QoE影响因素和相关功能，我们在个人云存储服务的一般用户（N=349）和一个专门针对主要流行的云存储服务之一Dropbox（N=49）的用户中进行了在线调查。第三项关于移动的Dropbox的研究（N=13）进一步调查了通过智能手机和平板电脑在移动的环境中的QoE和特定用例。基于这些结果，典型的使用情况，以及短期和长期的QoE影响因素，其中包括用户配置文件，上下文和情况，以及系统级的影响。在第四项实验室研究（N= 52）中，针对不同情况调查了等待时间的影响，即定期使用Dropbox期间对系统级别的短期QoE影响，并从前三项研究中获得用例。作为我们研究的结果，我们制定了研究问题，推动议程对基于云的文件存储服务的QoE测量和建模。
Cloud computing is receiving growing attention by researchers from a variety of disciplines. However, so far only a few studies exist that investigate the Quality of Experience (QoE) of cloud services, including the category of personal file storage services like Dropbox or Livedrive, from an end user perspective. The contribution of this paper is a methodology and the results of four different user studies towards a situational QoE model for file storage services. In order to obtain insights in existing usage practices and to detect possible QoE influencing factors and relevant features, we conducted an online survey amongst users of personal cloud storage services in general (N=349) and one specifically targeted at users of one of the major popular cloud storage services, namely Dropbox (N=49). A third study (N=13) on mobile Dropbox further investigated QoE and specific use cases in a mobile context, via smartphones and tablets. Based on these results, typical usage situations as well as short-term and long-term QoE influence factors were derived which included user profile, context and situation, as well as system level influences. In a fourth lab study (N= 52) the impact of waiting times, i.e. short-term QoE influences on system level during the regular usage of Dropbox, is investigated for different situations and use cases are obtained from the first three studies. As an outcome of our studies, we formulate research questions driving the agenda towards measuring and modeling QoE for cloud-based file storage services.