Popular journaling filesystems

What are the most popular journaling filesystems in GNU/Linux?

The most popular journaling filesystems in GNU/Linux are:

1. ext4 (Fourth Extended Filesystem):

   • Description: ext4 is the default filesystem for most GNU/Linux distributions. It is a mature and widely adopted journaling filesystem.
   • Features: High performance, support for large storage volumes and files, journaling for improved reliability and crash recovery, backward compatibility with ext2 and ext3.

2. XFS (eXtended Filesystem):

   • Description: XFS was originally developed by Silicon Graphics, Inc. It is known for its scalability and suitability for large-scale enterprise systems.
   • Features: Scalability for handling large storage volumes, support for parallel I/O operations, journaling for improved reliability, fast crash recovery, online defragmentation.

3. Btrfs (B-Tree File System):

   • Description: Btrfs is a modern and feature-rich filesystem designed for next-generation GNU/Linux systems. It includes built-in support for journaling.
   • Features: Copy-on-Write (CoW) functionality for efficient snapshots and rollbacks, support for subvolumes and quotas, data checksumming for enhanced data integrity, RAID support, transparent compression, online filesystem defragmentation.

4. JFS (Journaled File System):

   • Description: JFS was initially developed by IBM and later released as open-source. It provides journaling capabilities for improved reliability.
   • Features: Journaling for fast crash recovery and improved data integrity, support for large storage volumes and files, high-performance file access, efficient disk space allocation.

5. NILFS (New Implementation of a Log-structured File System):

   • Description: NILFS is a log-structured filesystem that uses a continuous log to ensure data consistency and recoverability.
   • Features: Continuous logging for quick recovery after system crashes, snapshot support, efficient handling of small file modifications, transparent compression.

These filesystems offer varying features and strengths, making them suitable for different use cases. The choice of a journaling filesystem depends on factors such as performance requirements, scalability, data integrity, and the specific needs of the system or storage device.