TAMING THE UNCERTAINTY OF PUBLIC CLOUDS

Maxim Schnjakin, Christoph Meinel
<span title="">2013</span> <i title="Services Society"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/mhxqr3pnize3doegptdz3tspsu" style="color: black;">Services Transactions on Cloud Computing</a> </i> &nbsp;
Public cloud storage services enable organizations to manage data with low operational expenses. However, the benefits come along with challenges and open issues such as security, reliability, performance unpredictability and the risk to become dependent on a provider for its service. In our work, we presented a system that improves availability, confidentiality and reliability of data stored in the cloud. To achieve this objective, we encrypt user's data and make use of the RAID technology
more &raquo; ... ciple to manage data distribution across cloud storage providers. Recently, we conducted a proof-of-concept experiment for our application to evaluate the performance and cost effectiveness of our approach. We deployed our application using eight commercial cloud storage repositories in different countries. We observed that our implementation improved the perceived availability and, in most cases, the overall performance when compared with cloud providers individually. We also observed a general trend that cloud storage providers have constant throughput values -whereby the individual throughput performance differs strongly from one provider to another. With this, the experienced transmissions can be utilized to increase the throughput performance of the upcoming data transfers. The aim is to distribute the data across providers according to their capabilities utilizing the maximum of the available throughput capacity. To assess the feasibility of the approach we have to understand how providers handle high simultaneous data transfers. Thus, we put an additional focus on the performance and the scalability evaluation of those cloud storage providers, which are supported by our application.
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