Package: gzip Version: 1.5-1.1 Severity: normal Dear Maintainer,
I have a backup system that performed well when running on squeeze using rdiff-backup, but on wheezy the daily diffs of gzipped mysqldump files are commonly almost as large as the original dump files. On inspection, it seems that gzip's --rsyncable option on wheezy is of benefit, but quite variable nothing near what is achieved when running on squeeze or on jessie. I've been testing this using docker with a Dockerfile as follows, which makes it relatively easy to compare performance on different OS versions. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ FROM debian:wheezy RUN apt-get update && apt-get install -y --no-install-recommends \ rdiff-backup RUN apt-get install -y --no-install-recommends wget RUN mkdir -p /tmp/testdir/src /tmp/testdir/dst WORKDIR /tmp/testdir RUN wget http://ftp.de.debian.org/debian/pool/main/l/linux/linux_3.18.5.orig.tar.xz RUN unxz linux_3.18.5.orig.tar.xz RUN ( cat linux_3.18.5.orig.tar) | gzip > src/standard.gz RUN ( cat linux_3.18.5.orig.tar) | gzip --rsyncable > src/rsyncable.gz RUN rdiff-backup -b src dst RUN rm src/* RUN (echo "difference"; cat linux_3.18.5.orig.tar) | gzip > src/standard.gz RUN (echo "difference"; cat linux_3.18.5.orig.tar) | gzip --rsyncable > src/rsyncable.gz RUN rdiff-backup -b src dst RUN ls -l dst/rdiff-backup-data/increments ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The diffs for wheezy are usually, but seemingly not always many orders of magnitude larger than for other versions. It's content dependent. I had a go at making a backport myself based on sources from jessie (and sid), and the configure stage fails to find a macro which is defined within the downloaded source. My knowledge of autoconf is both basic and rusty. Could someone help by providing a backport please? -- System Information: Debian Release: 7.8 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 3.2.0-4-amd64 (SMP w/1 CPU core) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages gzip depends on: ii dpkg 1.16.15 ii install-info 4.13a.dfsg.1-10 ii libc6 2.13-38+deb7u8 gzip recommends no packages. Versions of packages gzip suggests: ii less 444-4 -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
