xz compession, supported in wheezy/sid, was discussed a while back. Some users may not know that newer squashfs-tools is available in squeeze-backports. With that and => 2.6.38 kernel "xz" compression works fine for a Squeeze snapshot.
Benchmark test here, squashfs from the same base filesystem:
640.8 MB (default gzip)
560.7 MB (xz)
Leaves quite a bit of room for more apps than was possible before
Make sure this line exists in sources.list :
- Code:
deb http://backports.debian.org/debian-backports squeeze-backports main
- Code:
apt-get update
# check first that -686-pae will run on target machines, -486 and others are available
# substitute apt-get for corresponding aptitude command if preferred
apt-get install -t squeeze-backports linux-image-686-pae
apt-get install -t squeeze-backports linux-headers-686-pae
apt-get install -t squeeze-backports squashfs-tools
If it runs good, purge the standard squeeze kernel and save more space for snapshot
More recent snapshot versions
https://github.com/fsmithred/refracta support xz