we use a NAS to archive stream from database to files. If we look at the file size on disk, it is bigger than expected.
For example :
File size is 127K
ls -alh | grep write-chupmb-pdf 127K 2020-07-02 10:43 write-chupmb-pdf
Size on disk is 192K
du -sh * | grep write-chupmb-pdf 192K write-chupmb-pdf
Or expected size is 128K (with 4K blocs)