[Bug 1021975] Re: gzip --rsyncable not rsyncable

[Tamas Papp]

This option is still not supported. Is there a chance that it going t be
fixed?

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Title:
  gzip --rsyncable not rsyncable

Status in “gzip” package in Ubuntu:
  Confirmed

Bug description:
  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 at fudge:~$ rsync -Pvazl latest-linux-pg9.gz rj at 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 at fudge:~$ rsync -Pvazl latest-linux-pg9.gz rj at 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)

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