[clug] Neat Backup Solutions for desktops...

[steve jenkin]

Andrew Janke wrote on 7/12/09 9:47 AM:

> 
> Gnome == TimeVault
> 
>    https://wiki.ubuntu.com/TimeVault
> 
> Quite pretty but I have no idea how it does its backup.  By default it
> uses spare space on the current disk but can easily be pointed at
> other locations.


It says it does the same thing as 'Time Machine'.
I.e. hard-links to changed files.
Dependencies include python. Page mentions Nautilus (file manager)

=> not unlike rsnapshot or rsync with changes-from-a-previous-version


They point to an 'arsTechnica' article which explains OS/X 'Time Machine':
<http://arstechnica.com/reviews/os/mac-os-x-10-5.ars/14>

- second local volume organised by machine-name, Time-date-stamp, then
Volume. non-bootable volume, but recoverable to another disk with
install DVD

- hard links to unchanged files, copies of changed files. Complete file
is the smallest unit of change [cf. LVM snapshots]

- BUT, they've changed filesystem semantics to allow hard links to
directories. Apparently some 'extended attributes' stop looping graphs.

- A subsystem 'FSevents' notes all file changes. events have unique id's
and seem to be logged. Daemon can easily get list of changed files in a
delta-T.
<http://arstechnica.com/apple/reviews/2007/10/mac-os-x-10-5.ars/7>


IIRC, there's a Linux daemon that snaffles Filesystem events.
Been mentioned here. Anyone remind me of the name?

-- 
Steve Jenkin, Info Tech, Systems and Design Specialist.
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