Abstract
SummaryStorage quality‐of‐service (QoS) is a key issue for a storage cloud infrastructure. This paper presents QoSC, a QoS‐aware indiscriminate volume Storage Cloud over the dynamic network, based on the Hadoop distributed file system. QoSC employs a data redundancy policy based on indiscriminate recovery volumes and a QoS‐aware data placement strategy. We consider the QoS of a storage node as a combination of the transfer bandwidth, the availability of service, the workload (CPU utilization), the free storage space, and the failure rate of DataNodes. We have deployed QoSC on the campus network of Zhejiang University and have conducted a group of experiments and simulations on file storage and retrieval. The results show that QoSC improves the performance of file storage and retrieval and balances the workload among DataNodes, by being aware of QoS of DataNodes. Copyright © 2016 John Wiley & Sons, Ltd.
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