Thursday, March 29, 2012

Ghetto-timemachine Ruby Backup Script

I decided to try my hand at some Ruby scripting and figured, what better way than to port one of my existing Perl scripts.

The result is the Ruby ghetto-timemachine.rb backup script!

The code is maintained here:

So, what does it do? In a nutshell, it performs daily backups using a combination of hard links and rsync that result in a Time Machine like backup that uses very little additional space beyond the initial backup and the size of any files that change.

Example usage:
  • Local source to local destination with comma separated list of excludes
    ./ghetto-timemachine.rb --src ~/Pictures --dest /media/USB/backup --excludes \*.raw,\*.bmp
  • Local source to remote destination
    ./ghetto-timemachine.rb --src ~/Pictures --dest flakrat@rathole:/backup --excludes \*.raw,\*.bmp
Nightly cron job running at 1:10AM

10 1 * * * /home/flakrat/bin/ghetto-timemachine.rb --src ~/Pictures --dest flakrat@rathole:/backup --excludes \*.raw,\*.bmp

See the README for a more detailed description of the backup and rotation process.

Thursday, March 15, 2012

Fedora 16 Gnome Terminal Redraw Doesn't Always Completely Render

I've noticed an issue on my Fedora 16 workstation where Gnome Terminal redraws don't always completely render.

For example, it could be as simple as pressing the up arrow key to scroll through the CLI history (or ESC K for the 'set -o vi' crowd). A good percentage of the time when I'd do that, the command line wouldn't completely render, CTRL C and scrolling again usually cleared it up.

I also experienced the behavior a lot when in VI. Scroll or jump to a line and the text would end up being a combination of the previous page and the new location.

I experienced the issue using Nouveau and binary Nvidia drivers.

The following Bugzilla ticket provided a possible workaround. I've only just implemented the ENV variables, but after 1 day of use I have yet to experience the issue, where as before it was pretty consistent.

To globally apply the settings, add the following variables to end of /etc/gdm/Xsession

# Attempting to fix the Gnome terminal redraw issue:
export CLUTTER_DEBUG=disable-culling
export CLUTTER_PAINT=disable-clipped-redraws:disable-culling

Reboot, log back in and hopefully the issue goes away :-)