Programming Persistent Memory a Comprehensive Guide for Developers — Steve Scargall Programming Persistent Memory a Comprehensive Guide for Developers

Programming Persistent Memory A Comprehensive Guide for Developers — Steve Scargall Programming Persistent Memory A Comprehensive Guide for Developers Steve Scargall Programming Persistent Memory: A Comprehensive Guide for Developers Steve Scargall Santa Clara, CA, USA ISBN-13 (pbk): 978-1-4842-4931-4 ISBN-13 (electronic): 978-1-4842-4932-1 https://doi.org/10.1007/978-1-4842-4932-1 Copyright © 2020 by Intel This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. 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Printed on acid-free paper Table of Contents About the Author ................................................................................................... xiii About the Technical Reviewer .................................................................................xv About the Contributors ..........................................................................................xvii Acknowledgments ..................................................................................................xxi Preface .................................................................................................................xxiii Chapter 1: Introduction to Persistent Memory Programming .................................. 1 A High-Level Example Program �� 2 What’s Different? �� 5 The Performance Difference �� 6 Program Complexity �� 7 How Does libpmemkv Work? �� 8 What’s Next? �� 9 Summary �� 9 Chapter 2: Persistent Memory Architecture ........................................................... 11 Persistent Memory Characteristics �� 12 Platform Support for Persistent Memory �� 13 Cache Hierarchy �� 14 Power-Fail Protected Domains �� 16 The Need for Flushing, Ordering, and Fencing �� 19 Data Visibility �� 23 Intel Machine Instructions for Persistent Memory �� 24 Detecting Platform Capabilities �� 25 iii TABLE OF CONtENtS Application Startup and Recovery �� 27 What’s Next? �� 29 Summary �� 29 Chapter 3: Operating System Support for Persistent Memory ............................... 31 Operating System Support for Memory and Storage �� 31 Persistent Memory As Block Storage �� 33 Persistent Memory-Aware File Systems �� 34 Memory-Mapped Files �� 35 Persistent Memory Direct Access (DAX) �� 43 Summary �� 53 Chapter 4: Fundamental Concepts of Persistent Memory Programming ............... 55 What’s Different? �� 55 Atomic Updates �� 56 Transactions �� 57 Atomicity �� 57 Consistency �� 58 Isolation �� 58 Durability �� 58 Flushing Is Not Transactional �� 59 Start-Time Responsibilities �� 59 Tuning for Hardware Configurations �� 60 Summary ��

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