This article explains why file writes are non‑atomic, illustrates the risks of partial writes, and details how journaling (write‑ahead logging) and its variants—data and metadata journaling—ensure filesystem consistency and performance on Linux systems.
This article investigates intermittent disk IOWait spikes on Storm machines, identifies the kjournald and pdflush processes as primary contributors, explains ext3 journaling modes, and offers practical mount‑option tweaks like adding noatime to improve disk performance.
This article explains the design and operation of journaling file systems, compares Ext3, ReiserFS, XFS, and JFS across their logging modes, internal structures, and performance results from Postmark and Bonnie++ tests, and offers practical conclusions for different workload scenarios.
This article explains the disk layout of ext3 and ext4 filesystems, the mechanisms behind online resizing, and how meta block groups overcome the limitations of reserved descriptor blocks, providing a clear understanding for Linux system administrators.
This article explains why recovering deleted data on Ext3/Ext4 Linux filesystems is challenging, describes the role and limitations of the journal log, and provides a step‑by‑step demonstration of using D‑Recovery for Linux to restore files after deletion.
