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P. Waibel, J. Matt, C. Hochreiner, O. Skarlat, R. Hans, S. Schulte:
"Cost-optimized redundant data storage in the cloud";
Service Oriented Computing and Applications (SOCA), Volume 11 (2017), Issue 4; 411 - 426.

The use of cloud-based storage systems for storing data is a popular alternative to local storage systems. Beside several benefits of cloud-based storages, there are also downsides like vendor lock-in or unavailability. Moreover, the selection of the best fitting storage solution can be a tedious and cumbersome task and the storage requirements may change over time. In this paper, we formulate a system model that uses multiple cloud-based services to realize a redundant and cost-efficient storage. Within this system model, we formulate a local and a global optimization problem that considers historical data access information and predefined quality of service requirements to select a cost-efficient storage solution. Furthermore, we present a heuristic optimization approach for the global optimization. Extensive evaluations show the benefits of our work in comparison with a baseline that follows a state-of-the-art approach. We show that our solutions save up to 30% of the cumulative cost in comparison with the baseline.

Cloud storage · Redundant storage · Erasure coding · Vendor lock-in · Long-term storage · Global optimization · MILP

http://dx.doi.org/10.1007/s11761-017-0218-9

Project Head Stefan Schulte:
Cloud-based Rapid Elastic MAnufacturing