A Cloud-Computing-Based Data Placement Strategy in High-Speed Railway

Abstract EN

As an important component of China’s transportation data sharing system, high-speed railway data sharing is a typical application of data-intensive computing.

Currently, most high-speed railway data is shared in cloud computing environment.

Thus, there is an urgent need for an effective cloud-computing-based data placement strategy in high-speed railway.

In this paper, a new data placement strategy named hierarchical structure data placement strategy is proposed.

The proposed method combines the semidefinite programming algorithm with the dynamic interval mapping algorithm.

The semi-definite programming algorithm is suitable for the placement of files with various replications, ensuring that different replications of a file are placed on different storage devices, while the dynamic interval mapping algorithm ensures better self-adaptability of the data storage system.

A hierarchical data placement strategy is proposed for large-scale networks.

In this paper, a new theoretical analysis is provided, which is put in comparison with several other previous data placement approaches, showing the efficacy of the new analysis in several experiments.