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Use xz -T4 -0 instead of pxz

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Test showed very little difference in file-size between -0 and -9 while
both compression and decompression need much less memory and compression
needs less CPU time for -0.

Supported xz versions before 5.2 also accept the -T4 option but ignore it.

Also depend on xz-utils instead of downloading pxz.

LP: #1701132
This commit is contained in:
Balint Reczey 2017-12-05 22:40:35 +01:00
parent 7cc9576845
commit 646a88b5ee
2 changed files with 2 additions and 2 deletions
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1
debian/control vendored
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@ -31,6 +31,7 @@ Depends: ${misc:Depends},
rsync, rsync,
squashfs-tools (>= 1:3.3-1), squashfs-tools (>= 1:3.3-1),
vmdk-stream-converter [amd64 i386], vmdk-stream-converter [amd64 i386],
xz-utils,
zerofree zerofree
Suggests: partimage Suggests: partimage
Breaks: ubuntu-defaults-builder (<< 0.32) Breaks: ubuntu-defaults-builder (<< 0.32)

3
live-build/ubuntu-cpc/hooks/040-qcow2-image.binary
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@ -4,8 +4,7 @@ case $ARCH:$SUBARCH in
# Not sure if any other cloud images use subarch for something that # Not sure if any other cloud images use subarch for something that
# should take qcow2 format, so only skipping this on raspi2 for now. # should take qcow2 format, so only skipping this on raspi2 for now.
armhf:raspi2) armhf:raspi2)
apt-get install -qqy pxz xz -0 -T4 -c binary/boot/disk.ext4 > livecd.ubuntu-cpc.disk1.img.xz
pxz -T4 -c binary/boot/disk.ext4 > livecd.ubuntu-cpc.disk1.img.xz
exit 0 exit 0
;; ;;
esac esac