Performance Isolation in Shared Cloud-based Storage Systems

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Cloud computing represents an exciting new opportunity for businesses to free themselves from building and managing their own computing infrastructure. Business needs in computation and online hosting can be met by simply purchasing resources from Cloud providers. The rate of Cloud adoption, however, has been throttled by the inability of Cloud providers to offer performance guarantees that meet customer requirements. The culprits to this problem are also core tenets of Cloud computing: resource sharing and oversubscription. Cloud providers share each server's resources among multiple Cloud computing services from different businesses; this improves resource utilization and reduces the cost of hosting services. Unfortunately, such sharing can lead to inconsistent and unpredictable performance if there is significant resource contention.