On 05/28/2014 01:23 PM, Wim Bertels wrote: > Hallo, > > u can think of squasfs as a mountable tar.gz (more info on the website > below) > > has anyone got experience with the sort option in mksquashfs? > > on http://squashfs.sourceforge.net/ > in the presentation the sort option is way to optimize compression, > but i didn't find any examples or explainations on how to do that.
Check man mksquashfs and search for "-sort". It seems to be a file which specifies an order in which files are to be processed to take advantage of similarities in files with similar priority (7z for instance groups filenames by extension to be able to better compress redundant parts of similarily-structured files like HTML) > For now i've used: > > $ ionice -c 3 nice -n 19 mksquashfs dir_to_archive/ archive.squashfs > -comp xz -Xbcj x86 -Xdict-size 75% -always-use-fragments -b 1024 > > Suggestions to further optimize the compression? Try -Xdict-size 1M -no-xattrs -no-recovery although as far as I can tell, you have a pretty optimized commandline already. I am sure that my suggestion will not save much in practise. The results of using -sort with a suitable file depends on how exactly your files are distributed. I would be interested in the outcome if you found a means of generating a useful "SORT_FILE". HTH Linux-Fan -- http://masysma.ohost.de/
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