Cello: a disk scheduling framework for next generation operating systems
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SOSP '01 Proceedings of the eighteenth ACM symposium on Operating systems principles
Micro-Benchmark Based Extraction of Local and Global Disk
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Xen and the art of virtualization
SOSP '03 Proceedings of the nineteenth ACM symposium on Operating systems principles
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Virtual I/O scheduler: a scheduler of schedulers for performance virtualization
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IBMon: monitoring VMM-bypass capable InfiniBand devices using memory introspection
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PARDA: proportional allocation of resources for distributed storage access
FAST '09 Proccedings of the 7th conference on File and storage technologies
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EMSOFT '09 Proceedings of the seventh ACM international conference on Embedded software
Differential virtual time (DVT): rethinking I/O service differentiation for virtual machines
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CCGRID '10 Proceedings of the 2010 10th IEEE/ACM International Conference on Cluster, Cloud and Grid Computing
Differential virtual time (DVT): rethinking I/O service differentiation for virtual machines
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Self-tuning of disk input-output in operating systems
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Understanding performance implications of nested file systems in a virtualized environment
FAST'12 Proceedings of the 10th USENIX conference on File and Storage Technologies
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I/O scheduling in Android devices with flash storage
Proceedings of the 8th International Conference on Ubiquitous Information Management and Communication
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Disk I/O schedulers are an essential part of most modern operating systems, with objectives such as improving disk utilization, and achieving better application performance and performance isolation. Current scheduler designs for OSs are based heavily on assumptions made about the latency characteristics of the underlying disk technology like electromechanical disks, flash storage, etc. In virtualized environments though, with the virtual machine monitor sharing the underlying storage between multiple competing virtual machines, the disk service latency characteristics observed in the VMs turn out to be quite different from the traditionally assumed characteristics. This calls for a reexamination of the design of disk I/O schedulers for virtual machines. Recent work on disk I/O scheduling for virtualized environments has focused on inter-VM fairness and the improvement of overall disk throughput in the system. In this paper, we take a closer look at the impact of virtualization and shared disk usage in virtualized environments on the guest VM-level I/O scheduler, and its ability to continue to enforce isolation and fair utilization of the VM's share of I/O resources among applications and application components deployed within the VM.