Public bug reported:
One of the most annoying things with Deja Dup on my laptop are that
every time I boot it, for the first hour it works with deja dup /
duplcity to check what was changed since last time before the actual
backup takes place. During this time half of the CPU capacity and a
large amount of IO are taken for the task. Backup are important and a
wonderful peice of software as deja dup / duplicty takes a hit by this,
and may be interupted to many times when the load stops normal work.
You have certenly got this question many times, inotify-system have been
around for a long time now. With inotify we can get a message when a
file are changed and take action. For example we can build a small list
of what files are changed since last backup and use this instead of the
time consuming task to check every file in the file system with the
remote backup. With this list we can use --include-files-directive in
dublicity and start copying directly. Or we can implement continuis
backup, start backing up every changed file at the time the user has
closed it (or wait a couple of minutes not to build a long queue of
backups when the user changes the file eventy minute or so).
There are alot of pros using inotify (or incron), one of the bad thing
that has bo be solved are that we have to let kernel listen at all
directories in a directory structure. Now we only have to configure for
example /home/user-directory to include all sub directories for that
user. So we need a mechanism that builds a list of directories for
inotify including changes over time.
Another solution would be to use Zeitgeist and listen for changed files
using dbus. The upside whould be that deja dup can use the same privacy
configuration that Zeitgeist uses not to distribute secret files to the
backup site. Ive been programming with inotify and know there are no
overhead and its very easy to handle, but I don't have the same
experience of Zeitgeist api so I can't tell if its easy or not.
** Affects: deja-dup (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1056147
Title:
Deja Dup whould use inotify (or Zeitgeist) to be more efficient.
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