Below is a high-level comparison of some commonly used Linux file systems.
A Short Description of the Features : Journaling: Keeping a log of changes to the file system to enhance recovery after unexpected events or crashes.
Maximum File Size: The maximum size a single file can reach within the file system.
Inode Size: The size of the data structure that stores metadata information for files and directories.
Maximum Partition Size: The maximum size a partition or file system can reach on a storage device.
Extent Support: A feature that allows efficient storage of large contiguous data blocks.
Online Resizing: The ability to resize a file system without unmounting it or disrupting ongoing operations.
Checksums: Error-checking values used to ensure data integrity within the file system.
Copy-On-Write (CoW): A mechanism where data is duplicated only when modified, enhancing efficiency and reducing fragmentation.
Snapshots: Point-in-time copies of a file system's state, enabling easy backup and recovery.
RAID Support: The ability to work with Redundant Array of Independent Disks for improved data reliability or performance.
Fragments: Non-contiguous parts of a file scattered across a disk, impacting storage efficiency.
Online Defragmentation: Rearranging file fragments without unmounting the file system, enhancing performance.
Directory Indexing: Optimization technique to accelerate file lookups within directories.
Filesystem Check Tool: A tool (e.g., e2fsck) to verify and repair file system integrity.
Online Check/Repair: The ability to perform file system checks and repairs without unmounting.
Encryption: The process of encoding data to protect its confidentiality.
Data Deduplication: Identifying and eliminating duplicate data to optimize storage usage.
Transparent Compression: Automatically compressing data to save storage space.
File-level Snapshots: Capturing the state of individual files at specific points in time.
Subvolumes: Separate volumes within a file system, allowing independent management.
Online Filesystem Defragmentation: Rearranging file fragments without unmounting for improved performance.
Distributed Filesystem Support: Supporting file systems that span multiple machines.
ACL (Access Control Lists): A mechanism for defining fine-grained access control for files and directories.
Extended Attributes: Additional metadata associated with files and directories.
Case-Insensitive Filenames: Treating filenames without regard to case, making them interchangeable.
Case-Preserving Filenames: Preserving the case of filenames for display purposes.
Filesystem-level Quotas: Limiting the amount of disk space a user or group can consume.
Online Resize (Shrinking): Adjusting the size of a file system without unmounting, reducing its capacity.
Journal Checksums: Verifying the integrity of journaling data to enhance reliability.
Delayed Allocation: Postponing the allocation of disk space until data is actually written.
Inodes Per Block Group: The number of inodes grouped together, impacting file system performance.
Online Filesystem Check: Checking and repairing a file system while it is mounted.
Online Block Reallocation: Adjusting the allocation of data blocks without unmounting for better performance.
Fragmentation Handling: Dealing with the non-contiguous placement of data blocks on a disk.
Sparse File Support: Efficiently handling files that contain large amounts of empty space.
Timestamp Precision: The level of precision in recording file creation, modification, and access times.
Atomic Transactions: Ensuring that a series of file system operations either fully succeed or fail.
Filesystem Shredding: Securely deleting data by overwriting it, preventing recovery.
Access Time Updates: Recording the time a file was last accessed.
Multi-Mount Protection: Preventing simultaneous mounting of a file system on multiple machines.
Filesystem Check Frequency: How often the system automatically checks the file system for errors.
Filesystem Repair Time: The time required to repair a file system after an error is detected.
Automatic Filesystem Check: Initiating file system checks automatically at specified intervals.
Filesystem Feature Flags: Indicating specific features or behaviors enabled in the file system.
Online Filesystem Check/Repair: Performing checks and repairs on a mounted file system.
These one-liners provide concise explanations of various file system features and characteristics.
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