Package: xz-utils Version: 5.1.1alpha+20120614-2 Severity: wishlist xz does not understand sparse files, but compresses arbritary amounts of 0x00's instead. Currently, tar could serve as a workaround.
cd $(mktemp -d) dd if=/dev/zero of=testfile bs=4096 count=0 seek=4096 tar cSJf test.tar.xz testfile xz -k testfile ls -ls That gives me: 4 -rw-r--r-- 1 user users 200 Oct 12 23:46 test.tar.xz 0 -rw-r--r-- 1 user users 16777216 Oct 12 23:46 testfile 4 -rw-r--r-- 1 user users 2576 Oct 12 23:46 testfile.xz This awfully wastes not only capacity, but also computing time. Therefore I suggest handling sparse files efficiently. -- System Information: Debian Release: 7.6 APT prefers stable APT policy: (990, 'stable'), (500, 'stable-updates') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C) Shell: /bin/sh linked to /bin/dash Versions of packages xz-utils depends on: ii libc6 2.13-38+deb7u4 ii liblzma5 5.1.1alpha+20120614-2 xz-utils recommends no packages. xz-utils suggests no packages. -- no debconf information -- Kevin Price http://www.kevin-price.de/
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