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Mobile Cloud-of-Clouds Storage Made Efficient: A Network Coding Based Approach

机译：高效移动云存储：基于网络编码的方法

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Cloud-of-clouds storage is a viable means to ensure security and reliability of distributed data storage, where data are encrypted, encoded, and stored in multiple clouds. However, it is a great challenge to adopt such a paradigm in mobile devices (e.g., smartphone). Mobile devices are generally incapable to perform the heavy-weight operations (i.e., data encryption, encoding, and transmission) required in such a paradigm, given the limited resources in such devices. This paper focuses on addressing this challenge, i.e., improving data storage performance in mobile cloud-of-clouds storage systems. The key of our proposal is to allow the low-capability mobile devices to offload the computational and transmission overhead to the clouds. In other words, we propose a Network Coding based Cloud-of-clouds Storage (NCCS) scheme, where the clouds can encode and exchange data collaboratively. We consider two state-of-the-art cloud-of-clouds storage approaches, i.e., AONT-RS and CAONT-RS, as example cases to deploy our scheme. Accordingly, we propose their network coding-based enhancements, namely NAONT-RS and NCAONT-RS. We implement a prototype cloud-of-clouds system to verify the efficiency of our proposal. We deploy the prototype on Microsoft Azure and conduct extensive experiments with real-world traces. The experimental results show that NAONT-RS and NCAONT-RS can reduce the time of data storage process by up to 50% and improve the throughput by up to 110% compared with their original versions, i.e., AONT-RS and CAONT-RS.
机译：云存储是一种确保分布式数据存储的安全性和可靠性的可行方法，其中数据经过加密，编码和存储在多个云中。然而，在移动设备（例如，智能手机）中采用这样的范例是一个巨大的挑战。考虑到此类设备中有限的资源，移动设备通常无法执行此类范式中所需的繁重操作（即数据加密，编码和传输）。本文着重解决这一挑战，即提高移动云存储系统中的数据存储性能。我们建议的关键是允许低能力的移动设备将计算和传输开销转移到云上。换句话说，我们提出了一种基于网络编码的云云存储（NCCS）方案，其中云可以协同编码和交换数据。我们考虑两种最先进的云存储方法，即AONT-RS和CAONT-RS，作为部署我们方案的示例案例。因此，我们提出了基于网络编码的增强功能，即NAONT-RS和NCAONT-RS。我们实施了一个基于云的原型系统，以验证我们提案的效率。我们将原型部署在Microsoft Azure上，并使用实际跟踪进行广泛的实验。实验结果表明，与原始版本的AONT-RS和CAONT-RS相比，NAONT-RS和NCAONT-RS可以将数据存储过程的时间减少多达50％，并将吞吐量提高多达110％。

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