Researchers have developed a way to protect data and enable information services to continue working in disaster-affected areas, even when there is a network disruption over a wide area preventing access to remotely located back-ups.
The Research Institute of Electrical Communication at Tohoku University (RIEC), Hitachi, Ltd. (TSE:6501, Hitachi) and Hitachi Solutions East Japan, Ltd. (Hitachi Solutions East Japan) conducted simulations on a configuration of 24 servers at various municipal locations at both the city and prefectural levels.
When the data was replicated between locations unlikely to be simultaneously affected during a disaster, researchers found that as much as 94% of the data could be protected even when half of the servers were damaged.
By adjusting the number of data replicas according to the risk of data loss,*1 the same amount of data can be protected with half the number of replicas compared to conventional methods. This technology should enable disaster-resilient information platforms at an affordable cost.
A part of this work was presented at a meeting of the IEICE Technical Committee on Magnetic Recording & Information Storage, on June 9-10 at Tohoku University.
*1 Risk of data loss is defined as the risk that the server providing the data as a service during normal circumstances, and the server storing the replicated data for service during disaster periods, are both damaged at the same time.
For further information: http://www.hitachi.com/New/cnews/month/2016/05/160527a.html
Research Institute of Electrical Communication, Tohoku University
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