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Are there any filesystems that automatically trim files?


Asked by Robin Preston on Dec 03, 2021 FAQ



Among the filesystems that can issue trim requests automatically are ext4, Btrfs, FAT, GFS2, JFS, XFS, and NTFS-3G. However, in some distributions, this is disabled by default due to performance concerns, in favor of scheduled trimming on supported SSDs. Ext3, NILFS2 and OCFS2 offer ioctls to perform offline trimming.
In respect to this,
Not all filesystems make use of trim. Among the filesystems that can issue trim requests automatically are Ext4, Btrfs, FAT, GFS2, JFS,, XFS, and NTFS-3G. However, in some distributions, this is disabled by default due to performance concerns, in favor of scheduled trimming on supported SSDs.
Thereof, The TRIM command enables an operating system to notify the SSD of pages which no longer contain valid data. For a file deletion operation, the operating system will mark the file's sectors as free for new data, then send a TRIM command to the SSD.
Additionally,
A filesystem is the methods and data structures that an operating system uses to keep track of files on a disk or partition; that is, the way the files are organized on the disk. The word is also used to refer to a partition or disk that is used to store the files or the type of the filesystem.
Next,
If the specified value extends past the end of the filesystem, fstrim will stop at the filesystem size boundary. The default value extends to the end of the filesystem. -I, --listed-in list Specifies a colon-separated list of files in fstab or kernel mountinfo format.