Public bug reported: i use gzip --rsyncable to compress postgresql 9 db dumps for rsyncing from an east-coast colo to a west-coast colo. the dumps are always changing in small ways so this compression speeds up the rsync by quite a bit. both the following tests are with a large text dump file on both sides, the local is newer than the remote.
a gzip 1.3.12 (with http://archive.ubuntu.com/ubuntu/pool/main/g/gzip/gzip_1.3.12-9ubuntu1.diff.gz) session ends with the usual infodump like this: rj@fudge:~$ rsync -Pvazl latest-linux-pg9.gz rj@cake: Password: sending incremental file list latest-linux-pg9.gz 1857354904 100% 2.77MB/s 0:10:39 (xfer#1, to-check=0/1) sent 310747861 bytes received 301381 bytes 456418.55 bytes/sec total size is 1857354904 speedup is 5.97 but with the ubuntu server LTS gzip 1.4 i'm getting little or no speedup: rj@fudge:~$ rsync -Pvazl latest-linux-pg9.gz rj@cake: Password: sending incremental file list latest-linux-pg9.gz 1802447002 100% 634.16kB/s 0:46:15 (xfer#1, to-check=0/1) sent 1739614120 bytes received 297265 bytes 617318.21 bytes/sec total size is 1802447002 speedup is 1.04 i haven't taken a look at the code or data to suggest the difference, but the result is noticeable. basically, not super-critical because i can build previous versions with previous-version patches, but i figured i should report it. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: gzip 1.4-1ubuntu2 ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14 Uname: Linux 3.2.0-23-generic x86_64 ApportVersion: 2.0.1-0ubuntu8 Architecture: amd64 Date: Fri Jul 6 21:21:29 2012 InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64 (20120424.1) ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gzip UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: gzip (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1021975 Title: gzip --rsyncable not rsyncable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gzip/+bug/1021975/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
