Efficient Batched Synchronization in Dropbox-Like Cloud Storage Services - Middleware 2013 Access content directly
Conference Papers Year : 2013

Efficient Batched Synchronization in Dropbox-Like Cloud Storage Services

Christo Wilson
  • Function : Author
  • PersonId : 1003236
Zhefu Jiang
  • Function : Author
  • PersonId : 1003237
Yao Liu
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  • PersonId : 1003238
Ben Y. Zhao
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  • PersonId : 1003239
Cheng Jin
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  • PersonId : 1003240
Zhi-Li Zhang
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  • PersonId : 1003241
Yafei Dai
  • Function : Author
  • PersonId : 1003242


As tools for personal storage, file synchronization and data sharing, cloud storage services such as Dropbox have quickly gained popularity. These services provide users with ubiquitous, reliable data storage that can be automatically synced across multiple devices, and also shared among a group of users. To minimize the network overhead, cloud storage services employ binary diff, data compression, and other mechanisms when transferring updates among users. However, despite these optimizations, we observe that in the presence of frequent, short updates to user data, the network traffic generated by cloud storage services often exhibits pathological inefficiencies. Through comprehensive measurements and detailed analysis, we demonstrate that many cloud storage applications generate session maintenance traffic that far exceeds the useful update traffic. We refer to this behavior as the traffic overuse problem. To address this problem, we propose the update-batched delayed synchronization (UDS) mechanism. Acting as a middleware between the user’s file storage system and a cloud storage application, UDS batches updates from clients to significantly reduce the overhead caused by session maintenance traffic, while preserving the rapid file synchronization that users expect from cloud storage services. Furthermore, we extend UDS with a backwards compatible Linux kernel modification that further improves the performance of cloud storage applications by reducing the CPU usage.
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Dates and versions

hal-01480782 , version 1 (01-03-2017)





Zhenhua Li, Christo Wilson, Zhefu Jiang, Yao Liu, Ben Y. Zhao, et al.. Efficient Batched Synchronization in Dropbox-Like Cloud Storage Services. 14th International Middleware Conference (Middleware), Dec 2013, Beijing, China. pp.307-327, ⟨10.1007/978-3-642-45065-5_16⟩. ⟨hal-01480782⟩
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