Using digiKam with a LOT of tags

[Gilles Caulier]

Well, I know that Maik, have performed some investigations and apply some
patches. Just report and comment on bugzilla, he is in CC. We will see...

Gilles Caulier

2017-02-19 17:59 GMT+01:00 Alexander Langley <alexander.g.langley at gmail.com>
:

> Ah, I see. I apologize for not doing sufficient research before sending
> mail to the list. Is it possible to disable autocompletion without
> recompiling from source?
>
> - Alex
>
> On Feb 19, 2017, 11:51 -0500, Gilles Caulier <caulier.gilles at gmail.com>,
> wrote:
>
>
> The problem is not the tags amount in fact, and not the database.
>
> The problem is located in search text widget used to filter tree-view. When
> you start digiKam the widget is populated with tags a album name to provide
> auto completion. The loop inside the Qt widget model is like O(n^2) and
> hang-up.
>
> The possible solution is to disable autocompletion in this areas for the
> moment.
>
> The problem is reported in this file :
>
> https://bugs.kde.org/show_bug.cgi?id=367853
>
> .. and also already reported in this room...
>
> The problem is identified at least. We need a strategy to prevent this
> dysfunction.
>
> Gilles Caulier
>
>
>
> 2017-02-19 16:30 GMT+01:00 Alexander Langley <
> alexander.g.langley at gmail.com
> :
>
> Hello digiKam Users,
>
> digiKam Version: 5.4.0 (via Homebrew)
> OS: macOS
> OS Version: 10.12.3 (Sierra)
> PC Specs: Intel core i5, 4GB RAM
>
> I'm currently working on a project that requires I use a VERY LARGE number
> of
> tags. And by "VERY LARGE", I mean on the order of 220,000. After reading
> the
> digiKam database spec, I wrote a quick Python script to read my tag set in
> from
> a source JSON document and add it to the digiKam database using the sqlite3
> library.
>
> This did not make digiKam happy. When I attempted to launch it after
> adding the
> tags, it hung indefinitely at the loading screen step labeled "Reading the
> Database..." I verified that I hadn't mangled the database format, then
> tried
> again, only to be met with the same hang. By reducing the number of tags
> 85%
> (33,000), I was able to convince digiKam to start again, but it took 10
> minutes
> for it to open...
>
> Is this a supported use case? Is there a box I can check somewhere to
> tweak
> digiKam's database loading system to handle absurd numbers of tags? If
> not,
> would a code contribution to try to speed up tag loading be welcome?
>
> - Alex
>
>
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