Technology Trends and Disk Array Performance

Elford, C.L.; Reed, Daniel A.

doi:10.1006/jpdc.1997.1405

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…There have been many proposals about disk simulators [3] and its possible applications, which have been used during many years to analyze the impact of disk trends [4], file system designs [5], buffer-cache replacement algorithms [6], and other architectural elements' designs and policies [7], on system's performance.…”

Section: Related Workmentioning

confidence: 99%

Simultaneous Evaluation of Multiple I/O Strategies

González-Férez

Piernas

Cortes

2010

2010 22nd International Symposium on Computer Architecture and High Performance Computing

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We present a framework for simulating the performance obtained by different I/O system mechanisms and algorithms at the same time, and for dynamically turning them on and off to improve the overall system performance. A key element of this framework is the the design and implementation of a virtual disk inside the Linux kernel. Our virtual disk creates a virtual block device which is able to simulate any hard drive with a negligible overhead, without interfering with regular I/O requests. We describe the potential of our proposal in REDCAP, a RAM-based disk cache which is dynamically activated/deactivated according to the throughput achieved. The results show that, by using our virtual disk, REDCAP obtains its maximum possible improvements: up to 80% for workloads with some spatial locality, and the same performance as a "normal system" for workloads with random or large sequential reads.

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Section: Related Workmentioning

confidence: 99%

Simultaneous Evaluation of Multiple I/O Strategies

González-Férez

Piernas

Cortes

2010

2010 22nd International Symposium on Computer Architecture and High Performance Computing

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“…There have been many studies about disk simulators, and its applications [31,32,33]. For brevity, we only highlight those that are representative for our work.…”

Section: Related Workmentioning

confidence: 99%

Improving I/O Performance Through an In-Kernel Disk Simulator

González-Férez

Piernas

Cortes

2016

The Computer Journal

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This paper presents two mechanisms that can significantly improve the I/O performance of both hard and solid-state drives for read operations: KDSim and REDCAP. KDSim is an in-kernel disk simulator that provides a framework for simultaneously simulating the performance obtained by different I/O system mechanisms and algorithms, and for dynamically turning them on and off, or selecting between different options or policies, to improve the overall system performance. REDCAP is a RAM-based disk cache that effectively enlarges the built-in cache present in disk drives. By using KDSim, this cache is dynamically activated/deactivated according to the throughput achieved. Results show that, by using KDSim and REDCAP together, a system can improve its I/O performance up to 88% for workloads with some spatial locality on both hard and solid-state drives, while achieves the same performance as a "regular system" for workloads with random or sequential access patterns.

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A highly reliable and parallelizable data distribution scheme for data grids

Torkestani

2013

Future Generation Computer Systems

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Technology Trends and Disk Array Performance

Cited by 5 publications

References 23 publications

Simultaneous Evaluation of Multiple I/O Strategies

Simultaneous Evaluation of Multiple I/O Strategies

Improving I/O Performance Through an In-Kernel Disk Simulator

A highly reliable and parallelizable data distribution scheme for data grids

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