[dolphin] [Bug 497671] Dolphin should remove old/unused thumbnails to avoid too high disk space usage

[Felix Ernst]

https://bugs.kde.org/show_bug.cgi?id=497671

Felix Ernst <felixernst at kde.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|REPORTED                    |CONFIRMED

--- Comment #3 from Felix Ernst <felixernst at kde.org> ---
(In reply to Petr N. from comment #2)
> If Dolphin already creates some ram based index

The data needs to be stored in permanent storage eventually so we still would
have the issue of extra wear on the hardware just by navigating the file
system.

> date+time when the file/thumbnail parent folder has been accessed

Saving the information only once per parent folder would not work with the
current implementation because we do not store thumbnails by parent folder. The
stored thumbnails do not contain information about where their respective file
is. The thumbnail is stored per file so no matter where the file is
encountered, we will be able to load the thumbnail. There might also be privacy
concerns if from the thumbnails alone one could identify both when the file was
last opened as well as where the file is stored.

In any case I will mark the bug report as CONFIRMED because I think it is a
fair request even if I don't know how one would proceed here.

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