Download or read book Coding Techniques for Data storage Systems written by Yuval Cassuto and published by . This book was released on 2008 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Error Control Techniques for Data Storage Systems written by Erozan M. Kurtas and published by CRC Press. This book was released on 2018-10-03 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the massive amount of data produced and stored each year, reliable storage and retrieval of information is more crucial than ever. Robust coding and decoding techniques are critical for correcting errors and maintaining data integrity. Comprising chapters thoughtfully selected from the highly popular Coding and Signal Processing for Magnetic Recording Systems, Advanced Error Control Techniques for Data Storage Systems is a finely focused reference to the state-of-the-art error control and modulation techniques used in storage devices. The book begins with an introduction to error control codes, explaining the theory and basic concepts underlying the codes. Building on these concepts, the discussion turns to modulation codes, paying special attention to run-length limited sequences, followed by maximum transition run (MTR) and spectrum shaping codes. It examines the relationship between constrained codes and error control and correction systems from both code-design and architectural perspectives as well as techniques based on convolution codes. With a focus on increasing data density, the book also explores multi-track systems, soft decision decoding, and iteratively decodable codes such as Low-Density Parity-Check (LDPC) Codes, Turbo codes, and Turbo Product Codes. Advanced Error Control Techniques for Data Storage Systems offers a comprehensive collection of theory and techniques that is ideal for specialists working in the field of data storage systems.
Download or read book Coding Techniques for Repairability in Networked Distributed Storage Systems written by Frederique Oggier and published by . This book was released on 2013-06-01 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coding Techniques for Repairability in Networked Distributed Storage Systems is a tutorial on traditional erasure codes and their applications to networked distributed storage systems (NDSS), followed by a survey of novel code families tailor made for better repairability in NDSS.
Download or read book New Coding Techniques for Distributed Storage Systems written by Ankit Singh Rawat and published by . This book was released on 2015 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed storage systems (a.k.a. cloud storage networks) are becoming increasingly important, given the need to put away vast amounts of data that are being generated, analyzed and accessed across multiple disciplines today. Besides serving as backbone systems for large institutions such as CERN, Google and Microsoft, distributed storage systems have been instrumental in the emergence and rapid growth of the modern cloud computing framework. This dissertation takes a coding theoretic approach to address key issues related to designing these systems. First, the problem of enabling efficient mechanisms for restoring the state of the system after storage node failures in considered. In particular, this dissertation studies locally repairable codes that allow for reconstruction of the content stored on a failed node by contacting a small number of intact nodes. Since resilience to permanent loss of the stored information in the event of catastrophic failures is of primary interest in storage systems, explicit constructions for locally repairable codes with optimal minimum distance are presented. This dissertation also designs locally repairable codes that minimize repair-bandwidth, i.e., the amount of data downloaded during a node repair, in addition to the number of intact nodes contributing to the repair process. This dissertation further investigates a generalization of locally repairable codes where codes with the following property are studied: any small set of failed nodes is recoverable from a small number of other intact nodes. This is referred to as cooperative local repair. The main contributions in this regard are bounds on the minimum distance and the dimension of such codes, as well as explicit constructions of families of codes that enable cooperative local repair. The second issue addressed in this dissertation concerns management of hot data, i.e., the frequently accessed information. Towards this, the codes that allow for parallel accesses to information blocks are considered. This part of the dissertation explores the rate vs. minimum distance trade-off for such codes and presents explicit constructions of the codes that have high rate and large minimum distance while supporting (potentially scaling number of) parallel accesses to the stored information. One of the main contributions of the dissertation in this direction is a novel graph theoretic approach to construct batch codes. The batch codes as defined in the literature enable load balancing in a storage system in the sense that multiple requests for information blocks can be served in a parallel manner without downloading too much data from any particular storage node. Finally, this dissertation considers the issue of designing secure coding scheme for distributed storage systems. Given the decentralized nature of these systems and their increasing utilization to store valuable and confidential information, it is desirable that they be resilient against eavesdropping attacks. The problem of characterizing perfect secrecy capacity of distributed storage systems is studied. Using secrecy-precoding, this dissertation presents coding schemes that are secure against eavesdropping attacks while allowing for efficient node repair mechanisms.
Download or read book Multimode Constrained Coding Techniques for Digital Communications and Data Storage Systems written by Yongguang Zhu and published by . This book was released on 2009 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Codes for Mass Data Storage Systems written by Kees A. Schouhamer Immink and published by Shannon Foundation Publisher. This book was released on 2004 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Storage Systems written by Alexander Thomasian and published by Academic Press. This book was released on 2021-10-13 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: Storage Systems: Organization, Performance, Coding, Reliability and Their Data Processing was motivated by the 1988 Redundant Array of Inexpensive/Independent Disks proposal to replace large form factor mainframe disks with an array of commodity disks. Disk loads are balanced by striping data into strips—with one strip per disk— and storage reliability is enhanced via replication or erasure coding, which at best dedicates k strips per stripe to tolerate k disk failures. Flash memories have resulted in a paradigm shift with Solid State Drives (SSDs) replacing Hard Disk Drives (HDDs) for high performance applications. RAID and Flash have resulted in the emergence of new storage companies, namely EMC, NetApp, SanDisk, and Purestorage, and a multibillion-dollar storage market. Key new conferences and publications are reviewed in this book.The goal of the book is to expose students, researchers, and IT professionals to the more important developments in storage systems, while covering the evolution of storage technologies, traditional and novel databases, and novel sources of data. We describe several prototypes: FAWN at CMU, RAMCloud at Stanford, and Lightstore at MIT; Oracle's Exadata, AWS' Aurora, Alibaba's PolarDB, Fungible Data Center; and author's paper designs for cloud storage, namely heterogeneous disk arrays and hierarchical RAID. Surveys storage technologies and lists sources of data: measurements, text, audio, images, and video Familiarizes with paradigms to improve performance: caching, prefetching, log-structured file systems, and merge-trees (LSMs) Describes RAID organizations and analyzes their performance and reliability Conserves storage via data compression, deduplication, compaction, and secures data via encryption Specifies implications of storage technologies on performance and power consumption Exemplifies database parallelism for big data, analytics, deep learning via multicore CPUs, GPUs, FPGAs, and ASICs, e.g., Google's Tensor Processing Units
Download or read book Channel Coding Strategies for Emerging Data Storage Systems written by Ryan Christopher Gabrys and published by . This book was released on 2014 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: The on-going data revolution demands storage systems that can store very large quantities of data while being fast, reliable and cheap. Emerging storage technologies such as flash and granular media offer improved densities, faster access times, and are more power-efficient than conventional hard disk drives. The primary drawback associated with these new devices is their high error rate, caused by difficulties in programming, voltage drift, and wear-out. Coding methods used in existing storage applications are based on symmetric, Hamming-type metrics. However, when used in new memory devices, these traditional approaches result in costly overprovisioning. In this work, we present advanced coding-theoretic techniques applicable to modern storage devices that exploit the asymmetries in the underlying physical operations for improved performance. In many cases of interest, the results in this thesis represent the state of the art. Taken collectively, our results can help enable all modern, data-intensive technologies that require reliably storing large quantities of data.
Download or read book Application Driven Coding Techniques written by Siyi Yang and published by . This book was released on 2021 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data-driven applications are becoming ubiquitous. This dissertation is focused on developing advanced channel coding techniques for improved reliability and latency in a variety of data-hungry applications, from cloud storage, to memory devices, and quantum communications. The first line of our work focused on cloud storage. In order to accommodate the ever-growing data from various, possibly independent, sources and the dynamic nature of data usage rates in practical applications, modern cloud data storage systems are required to be scalable, flexible, and heterogeneous. The recent rise of the blockchain technology is also moving various information systems towards decentralization to achieve high privacy at low costs. We proposed channel codes with hierarchical locality that were the first to simultaneously achieve scalability and flexibility for both centralized cloud storage and decentralized storage networks (DSN). In particular, we proposed a joint coding scheme where each node receives extra protection through the cooperation with nodes in its neighborhood in a heterogeneous DSN with any given topology. Our proposed construction not only preserves desirable properties such as scalability and flexibility, which are critical in dynamic networks, but also adapts to arbitrary topologies, a property that is essential in DSNs but has been overlooked in existing works. The second line of our work focused on spatially-coupled (SC) codes design for advanced memory devices and quantum communications. SC codes have demonstrated potential in a variety of applications thanks to their excellent error-correcting performance and desirable structures that enable low latency decoding. While high memory SC codes are known to have superior performance, no prior work was able to produce practical codes due to computational complexity of the high-memory regime. We overcome this computational bottleneck in the finite-length construction of high-performance SC codes with high memory, with a novel coding framework that unifies seemingly disparate probabilistic and combinatorial approaches, and benefits from both. Simulation results show that codes obtained through our proposed method notably outperform state-of-the-art codes in a variety of practical settings, including flash memories and hard disk drives. Building on this new framework, we then developed a new class of channel codes for quantum communications. Combined with irregular-repeat-accumulate (IRA) codes that are known for excellent performance on low rate region, we constructed state-of-the-art SC-IRA codes for multidimensional quantum key distribution to efficiently generate private keys for one-time pad encrypted communications.
Download or read book Advanced Coding Techniques with Applications to Storage Systems written by Phong Nguyen and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation considers several coding techniques based on Reed-Solomon (RS) and low-density parity-check (LDPC) codes. These two prominent families of error-correcting codes have attracted a great amount of interest from both theorists and practitioners and have been applied in many communication scenarios. In particular, data storage systems have greatly benefited from these codes in improving the reliability of the storage media. The first part of this dissertation presents a unified framework based on rate-distortion (RD) theory to analyze and optimize multiple decoding trials of RS codes. Finding the best set of candidate decoding patterns is shown to be equivalent to a covering problem which can be solved asymptotically by RD theory. The proposed approach helps understand the asymptotic performance-versus-complexity trade-off of these multiple-attempt decoding algorithms and can be applied to a wide range of decoders and error models. In the second part, we consider spatially-coupled (SC) codes, or terminated LDPC convolutional codes, over intersymbol-interference (ISI) channels under joint iterative decoding. We empirically observe the phenomenon of threshold saturation whereby the belief-propagation (BP) threshold of the SC ensemble is improved to the maximum a posteriori (MAP) threshold of the underlying ensemble. More specifically, we derive a generalized extrinsic information transfer (GEXIT) curve for the joint decoder that naturally obeys the area theorem and estimate the MAP and BP thresholds. We also conjecture that SC codes due to threshold saturation can universally approach the symmetric information rate of ISI channels. In the third part, a similar analysis is used to analyze the MAP thresholds of LDPC codes for several multiuser systems, namely a noisy Slepian-Wolf problem and a multiple access channel with erasures. We provide rigorous analysis and derive upper bounds on the MAP thresholds which are shown to be tight in some cases. This analysis is a first step towards proving threshold saturation for these systems which would imply SC codes with joint BP decoding can universally approach the entire capacity region of the corresponding systems.
Download or read book Modulation Coding and Detection for High Density Data Storage Systems written by Barrett James Brickner and published by . This book was released on 1996 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Role of 6G Wireless Networks in AI and Blockchain Based Applications written by Borah, Malaya Dutta and published by IGI Global. This book was released on 2023-03-13 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Artificial intelligence (AI), the internet of things (IoT), and blockchain provide services to 6G in the form of radio resource management, mobility management, energy management, and network management. Moreover, 6G strengthens AI and blockchain-based applications. Further study on the benefits and potential opportunities of 6G for AI and blockchain is required to utilize the technology successfully. Role of 6G Wireless Networks in AI and Blockchain-Based Applications considers the role of the 6G wireless network deployed on AI and blockchain technology-based applications in fields such as the healthcare industry, agriculture, e-business, and transportation. The book specifically focuses on remote healthcare monitoring, online shopping preference, V2V communication, UAV, holographic application, and augmented and virtual reality as advanced services of 6G networks. Covering topics such as machine learning, smart cities, and virtual reality, this reference work is ideal for computer scientists, policymakers, researchers, scholars, academicians, practitioners, instructors, and students.
Download or read book Ad Hoc Networks written by Jun Zheng and published by Springer. This book was released on 2018-12-18 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 10th International Conference on Ad Hoc Networks, ADHOCNETS 2018, held in Cairns, Australia, in September 2018. The 27 full papers were selected from 50 submissions and cover a variety of network paradigms including mobile ad hoc networks, sensor networks, vehicular networks, underwater networks, airborne networks, underground networks, personal area networks, device-to-device (D2D) communications in 5G cellular networks, and home networks. The papers present a wide range of applications in civilian, commercial, and military areas.
Download or read book Coding and Signal Processing for Magnetic Recording Systems written by Bane Vasic and published by CRC Press. This book was released on 2004-11-09 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt: Implementing new architectures and designs for the magnetic recording read channel have been pushed to the limits of modern integrated circuit manufacturing technology. This book reviews advanced coding and signal processing techniques and architectures for magnetic recording systems. Beginning with the basic principles, it examines read/write operations, data organization, head positioning, sensing, timing recovery, data detection, and error correction. It also provides an in-depth treatment of all recording channel subsystems inside a read channel and hard disk drive controller. The final section reviews new trends in coding, particularly emerging codes for recording channels.
Download or read book Proceedings of the Future Technologies Conference FTC 2020 Volume 2 written by Kohei Arai and published by Springer Nature. This book was released on 2020-10-31 with total page 1015 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the state-of-the-art intelligent methods and techniques for solving real-world problems along with a vision of the future research. The fifth 2020 Future Technologies Conference was organized virtually and received a total of 590 submissions from academic pioneering researchers, scientists, industrial engineers, and students from all over the world. The submitted papers covered a wide range of important topics including but not limited to computing, electronics, artificial intelligence, robotics, security and communications and their applications to the real world. After a double-blind peer review process, 210 submissions (including 6 poster papers) have been selected to be included in these proceedings. One of the meaningful and valuable dimensions of this conference is the way it brings together a large group of technology geniuses in one venue to not only present breakthrough research in future technologies, but also to promote discussions and debate of relevant issues, challenges, opportunities and research findings. The authors hope that readers find the book interesting, exciting and inspiring.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Information and Communication Security written by Sihan Qing and published by Springer. This book was released on 2011-11-02 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 13th International Conference on Information and Communications Security, ICICS 2011, held in Beijing, China, in November 2011. The 33 revised full papers presented together with an invited talk were carefully reviewed and selected from 141 submissions. The papers are organized in topical sections on digital signatures, public key encryption, cryptographic protocols, applied cryptography, multimedia security, algorithms and evaluation, cryptanalysis, security applications, wireless network security, system security, and network security.
