## Sneakernet backup bandwidth enhancement @ Adrian Tritschler · Wednesday, May 5, 2010 · 1 minute read · Update at May 5, 2010 ·

My current backup regime is to use rdup to maintain daily archives on two external USB drives; one attached directly to fafnir at home, one attached to my PC at work. Once I got it all setup, cron takes care of the details and I only have to intervene when things go wrong.

Problems come up if I add large amounts of data at once, if rdup is updated and its data-file format changes — necessitating a complete backup rather than an incremental — bandwidth is never enough and it irks me to have to upload data that I know already exists at the other end. Rearranging existing files also causes problems, so yesterday I brought the USB drive home, did a little configuration file dance, backed everything up locally, then today took the drive back to work and redid the little configuration dance.

1. copy the config. file to match the drive when mounted locally

cd ~/.rdup cp list.fafnir.ssh:${USER}@nidhogg_media_LaCie_fafnir list.fafnir._media_LaCie_fafnir cp timestamp.fafnir.ssh:${USER}@nidhogg_media_LaCie_fafnir
timestamp.fafnir._media_LaCie_fafnir

2. do the backup

cd ~ rdup-simple -E ~/.rdup/excludes.fafnir.lst -v -x /home /media/LaCie/fafnir

3. copy the config. file to match the drive when mounted at the remote end

cd ~/.rdup cp list.fafnir._media_LaCie_fafnir
list.fafnir.ssh:${USER}@nidhogg_media_LaCie_fafnir cp timestamp.fafnir._media_LaCie_fafnir timestamp.fafnir.ssh:${USER}@nidhogg_media_LaCie_fafnir

My website, an agglomerative mess, probably half-eaten by a gru

# …The Owner

There’s not much more I can add to who I am.

# …The Site

Vanity site? Technology experiment? Learning tool? Blog? Journal? Diary? Photo album? I could tell you, but then I’d have to kill you…

I experiment. I play. I write and I take pictures. Some of the site is organised around topics, other parts are organized by date, then there’s always the cross-references between them.

Its all been here a fairly long time. Like the papers on my desk, or the books on the bedside table, the pile just grew… and it all grew without much plan or structure. I try not to break URLs, so historical oddities abound.

Long ago it started as a learning experiment with a few static HTML pages, then I added a bit of server-side includes and some very ugly PHP. A hand-built journal/blog on top of that PHP, then a few experiments in moving to various static publishing systems. I’ve never wanted a database-based blogging engine, so over the years I’ve tried PHP, nanoblogger, emacs-muse, silkpage and docbook before settling on Emacs Org mode for writing and jekyll for publishing. But the itch remained… I never really liked jekyll and the ruby underneath always seemed so much black magic. So now the latest incarnation is Org mode and hugo.

# …The ISP

• Hosted by @cos