Your message dated Fri, 3 Jul 2020 19:02:04 +0100
with message-id 
<CABwkT9rbV_uTj7nH5=ra0tj7l466uv8m62bpx+kjkdjh15y...@mail.gmail.com>
and subject line Add *.squashfs to DEFAULT_DONT_COMPRESS
has caused the Debian Bug report #860002,
regarding Add *.squashfs to DEFAULT_DONT_COMPRESS
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
860002: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860002
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: rsync
Version: 3.1.2-2
Severity: wishlist

Rsync maintains a default list of file extensions that don't benefit from 
rsync's own compression:

    v3.1.2:loadparm.c:#define DEFAULT_DONT_COMPRESS "*.gz *.zip *.z *.rpm *.deb 
*.iso *.bz2" \
    v3.1.2:loadparm.c-      " *.t[gb]z *.7z *.mp[34] *.mov *.avi *.ogg *.jpg 
*.jpeg *.png" \
    v3.1.2:loadparm.c-      " *.lzo *.rzip *.lzma *.rar *.ace *.gpg *.xz *.txz 
*.lz *.tlz"

Please add *.squashfs to this list.

squashfs is sort of a cross between .iso and .tgz, and
is almost always already compressed heavily.

Debian itself uses this format to distribute Debian Live images:

    $ rsync --no-motd -hh 
mirror.internode.on.net::debian-cd/current-live/amd64/webboot/*.squashfs
    -rw-r--r--       1008.14M 2017/01/17 10:42:11 
debian-live-8.7.1-amd64-cinnamon-desktop.squashfs
    -rw-r--r--          1.18G 2017/01/17 10:46:10 
debian-live-8.7.1-amd64-gnome-desktop.squashfs
    -rw-r--r--          1.08G 2017/01/17 10:43:35 
debian-live-8.7.1-amd64-kde-desktop.squashfs
    -rw-r--r--        843.36M 2017/01/17 10:33:24 
debian-live-8.7.1-amd64-lxde-desktop.squashfs
    -rw-r--r--        878.48M 2017/01/17 10:33:10 
debian-live-8.7.1-amd64-mate-desktop.squashfs
    -rw-r--r--        302.14M 2017/01/17 10:15:36 
debian-live-8.7.1-amd64-standard.squashfs
    -rw-r--r--        837.21M 2017/01/17 10:33:16 
debian-live-8.7.1-amd64-xfce-desktop.squashfs

The default can be overridden in rsyncd.conf (dont compress = ...) or with 
rsync (--skip-compress=...),
so this is not urgent, just "nice to have".

It looks like this list hasn't changed since 2010.
You might want to add some other extensions that have appeared in the latest 
decade --- ogv, webm, webp spring to mind.

--- End Message ---
--- Begin Message ---
Version: 3.2.0-1

"squashfs" was added to the list of ignored extensions, together with
some other ones.

Thanks for the report.

-- 
Samuel Henrique <samueloph>

--- End Message ---

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