Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: deja-dup (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1056147
Title:
Deja Dup should use inotify or Zeitgeist to get the list of changed
files
Status in “deja-dup” package in Ubuntu:
Confirmed
Bug description:
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.
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