[Bug 1782535] Re: cifs - poor upload speed with nautilus compared to rsync

[Sebastien Bacher]

Would still be good to backport to the LTS if we know what changed
resolved the issue

** Changed in: glib2.0 (Ubuntu)
       Status: Triaged => Fix Released

** Bug watch added: gitlab.gnome.org/GNOME/glib/issues #1688
   https://gitlab.gnome.org/GNOME/glib/issues/1688

** Also affects: glib via
   https://gitlab.gnome.org/GNOME/glib/issues/1688
   Importance: Unknown
       Status: Unknown

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Title:
  cifs - poor upload speed with nautilus compared to rsync

Status in GLib:
  Unknown
Status in glib2.0 package in Ubuntu:
  Fix Released

Bug description:
  I'm mounting folders from my NAS on my computer (Ubuntu 18.04) with
  cifs. Copying an 8 GB file...

  Upload (local -> mounted)
  - Nautilus/Nemo -> 6 MB/s
  - rsync -> 50-60 MB/s

  Download performance is also strange, but not my biggest concern.
  Download (mounted -> local)
  - Nautilus/Nemo -> 90 MB/s
  - rsync -> 50-60 MB/s

  rsync command (upload):
  rsync --progress /home/me/file.iso /mnt/cifs_media/

  fstab entry:
  //nas/media /mnt/cifs_media cifs vers=3.0,uid=me,gid=me,credentials=/home/me/.smbcredentials,dir_mode=0700,file_mode=0700 0 0

  Any idea, why Nautilus is uploading up to 10 times more slowly than
  rsync, although both using the same cifs, os, hardware, network etc.?

  PS: Further info for bug report
  1) The release of Ubuntu: Ubuntu 18.04 LTS
  2) The version of the package: Nautilus 3.26.3
  3) What you expected to happen: At least same speed as with using rsync
  4) What happened instead: See above

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