Characterizing Large Storage Systems

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Characterizing Large Storage Systems

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Author : Nisha Talagala
language : en
Publisher:
Release Date : 1999

Characterizing Large Storage Systems written by Nisha Talagala and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Computer storage devices categories.

Big Data Storage Workload Characterization Modeling And Synthetic Generation

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Author :
language : en
Publisher:
Release Date : 2014

Big Data Storage Workload Characterization Modeling And Synthetic Generation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

Performance Characterization And Benchmarking Traditional To Big Data

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Author : Raghunath Nambiar
language : en
Publisher: Springer
Release Date : 2015-02-04

Performance Characterization And Benchmarking Traditional To Big Data written by Raghunath Nambiar and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-04 with Computers categories.

This book constitutes the refereed post-conference proceedings of the 6th TPC Technology Conference, TPCTC 2014, held in Hangzhou, China, in September 2014. It contains 12 selected peer-reviewed papers, a report from the TPC Public Relations Committee. Many buyers use TPC benchmark results as points of comparison when purchasing new computing systems. The information technology landscape is evolving at a rapid pace, challenging industry experts and researchers to develop innovative techniques for evaluation, measurement and characterization of complex systems. The TPC remains committed to developing new benchmark standards to keep pace and one vehicle for achieving this objective is the sponsorship of the Technology Conference on Performance Evaluation and Benchmarking (TPCTC). Over the last five years TPCTC has been held successfully in conjunction with VLDB.

Evolving System Stack For Persistent Memory

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Author : Kan Wu (Ph.D.)
language : en
Publisher:
Release Date : 2022

Evolving System Stack For Persistent Memory written by Kan Wu (Ph.D.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.

Data has been critical to human society, and data storage systems that hold the data of every human being are playing an important role in people's modern lives. These storage systems serve people's information in a variety of places, from mobile devices and laptops to large-scale data centers and the cloud. People rely on these storage systems for critical applications such as e-commerce, social media, health care, and artificial intelligence. In the modern world, people interact with data storage systems almost every moment. As a result, there is a high demand for data storage systems that are reliable, large, performant, and cost-effective. To meet these demands, the system community has been working on high-performance, low-cost storage devices as well as software system stacks to manage them. For decades, numerous storage devices such as tape, DRAM, HDD, and SSD have been invented. Meanwhile, system stacks to manage these devices have evolved, ranging from primitive data structures (e.g., B-tree) to complex file systems and distributed storage systems. This dissertation focuses on Persistent Memory (PM), a new development in the storage device landscape. We investigate how to evolve the system stack for new PM devices. In the first part of this thesis, we characterize a popular PM-based device - the Intel Optane SSD. We investigate the performance of Optane SSDs in response to a variety of micro-experiments. We formalize an "unwritten contract", which includes rules that are essential for Optane SSD users to achieve optimal performance. We also use carefully designed experiments to reveal the internals of Optane SSDs. We reveal Optane SSD's internal parallelism, read-write scheduling mechanisms, and so on. These internals provide insights about the unwritten contract. Finally, we discuss implications of our device characterization. In the second part, we investigate how classic caching performs on modern storage hierarchies, with new PM devices filling the gap between DRAM and SSD. We compare DRAM/PM/Low-latency SSDs/Flash SSDs quantitatively. Our analysis shows that modern hierarchies have a much smaller performance difference between neighboring layers than traditional hierarchies. We then examine caching on modern hierarchies. Caching manages data across two layers: a cache layer (faster but smaller) and a capacity layer (slower but larger). We find that classic caching, which directs as many accesses to the cache layer as possible (referred as the principle of maximizing hit rates), cannot effectively utilize the significant available performance in today's capacity layer (e.g., PM). Thus, we introduce three improvements (read around, admission rejection, and feedback-based offloading) that evolve classic caching for PM hierarchies. In the final part of this thesis, we study how unique characteristics of PM influence the effectiveness of existing sharing mechanisms. We focus on a detailed setup of multi-tenant in-memory key-value caches. We first summarize the basic mechanisms (for example, resource usage accounting, interference analysis, etc.) used to achieve diverse sharing goals. We then investigate these mechanisms on PM. Our analysis shows that existing sharing mechanisms designed for DRAM/block devices do not readily translate to PM due to PM's unique characteristics such as 256B access granularity and severe and unfair interference between reads and writes. To address this issue, we present Nyx, a PM access regulation framework that is optimized for today's PM without special hardware support. Nyx introduces new software sharing mechanisms for PM that can be be used to easily and efficiently support sharing policies such as resource limiting, QoS, fair slowdown, and proportional sharing.

The Characterization And Assessment Of Selected Solar Thermal Energy Systems For Residential And Process Heat Applications

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Author : Jack C. Hyde
language : en
Publisher:
Release Date : 1979

The Characterization And Assessment Of Selected Solar Thermal Energy Systems For Residential And Process Heat Applications written by Jack C. Hyde and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Solar heating categories.

Computer Architecture

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Author : John L. Hennessy
language : en
Publisher: Elsevier
Release Date : 2012

Computer Architecture written by John L. Hennessy and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Computers categories.

The computing world is in the middle of a revolution: mobile clients and cloud computing have emerged as the dominant paradigms driving programming and hardware innovation. This book focuses on the shift, exploring the ways in which software and technology in the 'cloud' are accessed by cell phones, tablets, laptops, and more

Evolving System Stack For Persistent Memory

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Author : Kan Wu (Ph.D.)
language : en
Publisher:
Release Date : 2022

Evolving System Stack For Persistent Memory written by Kan Wu (Ph.D.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.

Data has been critical to human society, and data storage systems that hold the data of every human being are playing an important role in people's modern lives. These storage systems serve people's information in a variety of places, from mobile devices and laptops to large-scale data centers and the cloud. People rely on these storage systems for critical applications such as e-commerce, social media, health care, and artificial intelligence. In the modern world, people interact with data storage systems almost every moment. As a result, there is a high demand for data storage systems that are reliable, large, performant, and cost-effective. To meet these demands, the system community has been working on high-performance, low-cost storage devices as well as software system stacks to manage them. For decades, numerous storage devices such as tape, DRAM, HDD, and SSD have been invented. Meanwhile, system stacks to manage these devices have evolved, ranging from primitive data structures (e.g., B-tree) to complex file systems and distributed storage systems. This dissertation focuses on Persistent Memory (PM), a new development in the storage device landscape. We investigate how to evolve the system stack for new PM devices. In the first part of this thesis, we characterize a popular PM-based device - the Intel Optane SSD. We investigate the performance of Optane SSDs in response to a variety of micro-experiments. We formalize an "unwritten contract", which includes rules that are essential for Optane SSD users to achieve optimal performance. We also use carefully designed experiments to reveal the internals of Optane SSDs. We reveal Optane SSD's internal parallelism, read-write scheduling mechanisms, and so on. These internals provide insights about the unwritten contract. Finally, we discuss implications of our device characterization. In the second part, we investigate how classic caching performs on modern storage hierarchies, with new PM devices filling the gap between DRAM and SSD. We compare DRAM/PM/Low-latency SSDs/Flash SSDs quantitatively. Our analysis shows that modern hierarchies have a much smaller performance difference between neighboring layers than traditional hierarchies. We then examine caching on modern hierarchies. Caching manages data across two layers: a cache layer (faster but smaller) and a capacity layer (slower but larger). We find that classic caching, which directs as many accesses to the cache layer as possible (referred as the principle of maximizing hit rates), cannot effectively utilize the significant available performance in today's capacity layer (e.g., PM). Thus, we introduce three improvements (read around, admission rejection, and feedback-based offloading) that evolve classic caching for PM hierarchies. In the final part of this thesis, we study how unique characteristics of PM influence the effectiveness of existing sharing mechanisms. We focus on a detailed setup of multi-tenant in-memory key-value caches. We first summarize the basic mechanisms (for example, resource usage accounting, interference analysis, etc.) used to achieve diverse sharing goals. We then investigate these mechanisms on PM. Our analysis shows that existing sharing mechanisms designed for DRAM/block devices do not readily translate to PM due to PM's unique characteristics such as 256B access granularity and severe and unfair interference between reads and writes. To address this issue, we present Nyx, a PM access regulation framework that is optimized for today's PM without special hardware support. Nyx introduces new software sharing mechanisms for PM that can be be used to easily and efficiently support sharing policies such as resource limiting, QoS, fair slowdown, and proportional sharing.

Characterization Of Information Requirements For Studies Of Co2 Effects

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Author : Margaret R. White
language : en
Publisher:
Release Date : 1986

Characterization Of Information Requirements For Studies Of Co2 Effects written by Margaret R. White and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Atmospheric carbon dioxide categories.

Particle Characterization In Technology

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Author : Beddow
language : en
Publisher: CRC Press
Release Date : 2018-01-18

Particle Characterization In Technology written by Beddow and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-18 with Science categories.

Volume I present an important exposition of some of the most significant areas where particle characterization is applied. The technological fields include pharmaceutical materials, bulk solids, and explosions.

Characterization And Control Of Odours And Voc In The Process Industries

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Author : S. Vigneron
language : en
Publisher: Elsevier
Release Date : 1994-09-01

Characterization And Control Of Odours And Voc In The Process Industries written by S. Vigneron and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-09-01 with Science categories.

The purpose of the symposium was to present recent advances in characterization and control of odour and volatile organic compound emissions in the atmosphere, and to contribute to the state-of-the-art of measurement and sampling tools, impact prediction methods and abatement techniques. Topics covered were: Legislative aspects Emission characterization Abatement technologies, both recuperative and destructive and Reduction methods. Apart from the global problems of climate, all aspects relating to the workplace environment and official regulations were discussed.