On jeudi 5 octobre 2023 13:28:21 CEST dboland9 wrote:
> I know from reading the docs that DT uses SQLite to store some information,
> but how are the images and the image meta data stored? The reason for the
> question is that I'm uncomfortable with putting everything in a database in
> case something goes wrong. Thanks for any helpful responses.
>
> Dave,
>
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Your original images stay were you put them, darktable won't move or change
them. Metadata from the original files and metadata you add (tags, titles,
etc, and editing information) are stored in the database (but *never* removed
from the original files, those are not changed in any way). Images are never
stored in the dt database.
(There's a cache for thumbnails, in order to speed up operations, but those
are not criticial, and you can remove them at any moment without loss of
data).
Metadata can also be stored in so-called sidecar files (xmp files that will
contain the metadata and the editing operations you performed on the original
image). You can recreate the image database from those xmp files. (dt has
another database for e.g. styles and presets you can define, and some other
general information).
You can also use dt without the image database (see option "-library
:memory:") but then you better use sidecar files, as that would be the only
way to save edits between sessions.
This also means that to get an edited image as a separate file, you need to
explicitly export that edit to e.g. a jpg file.
Remco
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