Explore the virtual file system (VFS) and how it serves as an abstraction layer for the actual file system
Understand how the block layer acts as an intermediary between file systems and physical storage
Discover the physical layout and protocols linked with storage media

Book Description

The Linux storage stack serves as a prime example of meticulously coordinated layers. Embark on a journey through the kernel code with Architecture and Design of the Linux Storage Stack, crafted for anyone seeking in-depth knowledge about the layered design of Linux storage and its landscape.

You'll explore the Linux storage stack and its various concepts. You'll unlock the secrets of the virtual filesystem and the actual filesystem and the differences in their implementation, the role of the block layer, the Multi-Queue and Device Mapper frameworks, I/O schedulers, physical storage layout, and how to analyze all the layers in the storage stack.

By the end of this book, you'll be acquainted with how a simple I/O request from a process travels down through all the layers and ends up in physical storage.

What you will learn

Understand the role of the virtual filesystem
Explore the different flavors of Linux filesystems and their key concepts
Manage I/O operations to and from block devices using the block layer
Deep dive into the Small Computer System Interface (SCSI) subsystem and the layout of physical devices
Gauge I/O performance at each layer of the storage stack
Discover the best storage practices

Who this book is for

This book is for system and storage administrators, engineers, linux professionals, linux community in general, and anyone looking to expand their understanding of Linux and its storage landscape. Prior knowledge of Linux operating system is a must.

Where It All Starts From – The Virtual Filesystem
Explaining the Data Structures in a VFS
Exploring the Actual Filesystems Under the VFS
Understanding the Block Layer, Block Devices, and Data Structures
Understanding the Block Layer, Multi-Queue, and Device Mapper
Understanding I/O Handling and Scheduling in the Block Layer
The SCSI Subsystem
Illustrating the Layout of Physical Media
Analyzing Physical Storage Performance
Analyzing Filesystems and the Block Layer
Tuning the I/O Stack

About the Author

Muhammad Umer (RHCA�) is a systems engineer and trainer with more than six years of experience in working with Linux based systems, HA design & architecture, tuning operating system and underlying hardware for optimal performance and root cause analysis. Ever since a virus infected his laptop ten years ago, he switched to Linux. Turns out, it wasn’t the worst thing that ever happened. He has a particular preference for all things storage and in this book, he has tried to decode the mysteries of the Linux storage stack one disk sector at a time. When not immersed in the binary wonders of storage, you can find him savoring pizza and dreaming of a world where storage is as reliable as a perfectly timed cron job.

"About this title" may belong to another edition of this title.

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