Infrastructure-as-a-Service (IaaS) cloud platforms have brought two unprecedented changes
to cluster provisioning practices. First, any (nonexpert) user can provision a cluster of any …

Large-scale data centers leverage virtualization technology to achieve excellent resource
utilization, scalability, and high availability. Ideally, the performance of an application …

A unique merit of a solid-state drive (SSD) is its internal parallelism. In this article, we
present a set of comprehensive studies on understanding and exploiting internal parallelism …

We propose an I/O classification architecture to close the widening semantic gap between
computer systems and storage systems. By classifying I/O, a computer system can request …

Distributed storage resources are managed based on data collected from online monitoring
of workloads on the storage resources and performance characteristics of the storage …

In this paper, we present a stream-based mining algorithm for online anomaly prediction.
Many real-world applications such as data stream analysis requires continuous cluster …

Live migration of virtual hard disks between storage arrays has long been possible.
However, there is a dearth of online tools to perform automated virtual disk placement and …

Virtualized datacenters strive to reduce costs through workload consolidation. Workloads
exhibit a diverse set of IO behaviors and varying IO load that makes it difficult to estimate the …

Cloud computing offers users the potential to reduce operating and capital expenses by
leveraging the amortization benefits offered by large, managed infrastructures. However, the …

Traditional performance models are too brittle to be relied on for continuous capacity
planning and performance debugging in many computer systems. Simply put, a brittle model …