How Ext4 Stores Data: Inodes, Extents, and Directory Indexes Explained

This article explains how the ext4 file system organizes data using inodes, direct and indirect blocks, extents, and directory indexing, detailing the structures, code definitions, and performance implications for both small and large files.

Filesystemdirectory-indexext4

0 likes · 13 min read

How Ext4 Stores Data: Inodes, Extents, and Directory Indexes Explained

ITPUB

Nov 4, 2020 · Operations

Understanding Linux ext4 File System: Inodes, Extents, and Caching Mechanisms

This article explains the core design of Linux file systems, covering strict organization, block and inode structures, ext4 formatting details such as extents and meta block groups, directory storage, journaling modes, and the kernel's cached and direct I/O paths for reading and writing files.

Linuxext4extents

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Understanding Linux ext4 File System: Inodes, Extents, and Caching Mechanisms

Aikesheng Open Source Community

Nov 14, 2019 · Databases

Understanding InnoDB Tablespace Space Management

This article explains how InnoDB stores user tables and indexes in .ibd files, describes the structure of tablespaces, pages, extents, header pages, XDES entries, INODE pages, and file segments, and shows how indexes allocate and free these internal structures as they grow and shrink.

Database InternalsInnoDBPages

0 likes · 10 min read

Understanding InnoDB Tablespace Space Management