QoS-aware storage virtualization for cloud file systems

We present a reservation scheduler for object-based file systems. It supports storage virtualization for multi-tenant cloud environments with quality of service (QoS) guarantees. The reservation scheduler has been integrated into the XtreemFS cloud file system to maximize the resource utilization under the given QoS demands. Our simulation results obtained with a discrete event simulator indicate that a considerable number of active object stores can be saved while still ensuring the requested service guarantees (capacity, throughput, IOPS, etc.).

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