Ext4 file systems are inherently designed to reduce fragmentation through advanced techniques such as extent-based allocation, which groups contiguous blocks of data together. Typically, ext4 file systems experience minimal fragmentation, making extensive defragmentation processes less critical.
There is a program for ext4 formats to defrag.
All Puppy Linux OS's should already have this program.
e4defrag
e4defrag performs online defragmentation, which means it defragments files while the system is running and the file system is mounted and in use. To be clear, we can safely defragment a file while another program is using it.
Use in a terminal.
Usage:
e4defrag [-v] file...| directory...| device...
e4defrag -c file...| directory...| device...Target can be a regular file, a directory, or a device that is
mounted as ext4 file system. If target is a directory, e4defrag
reduces fragmentation of all files in it. If target is a device,
e4defrag gets the mount point of it and reduces fragmentation of
all files in this mount point.
It is a simple program to use, but does have a few options.
OPTIONS :
-c Get a current fragmentation count and an ideal
fragmentation count, and calculate fragmentation score
based on them. By seeing this score, we can determine
whether we should execute e4defrag to target. When used
with -v option, the current fragmentation count and the
ideal fragmentation count are printed for each file.Also this option outputs the average data size in one
extent. If you see it, you'll find the file has ideal
extents or not. Note that the maximum extent size is
131072KB in ext4 file system (if block size is 4KB).If this option is specified, target is never defragmented.
-v Print error messages and the fragmentation count before
and after defrag for each file.
