[Bug 269467] New: writing metadata- strange observation

[Axel Krebs]

https://bugs.kde.org/show_bug.cgi?id=269467

           Summary: writing metadata- strange observation
           Product: digikam
           Version: 2.0.0
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Created an attachment (id=58357)
 --> (http://bugs.kde.org/attachment.cgi?id=58357)
Data showing percentage of writing metadata in files, as a function of time

Version:           2.0.0 (using KDE 4.6.1)
OS:                Linux

my statistics are as follows:

digiKam version 2.0.0-beta4
AVI:                        59
GIF:                        99
JPG:                     57060
PNG:                       624
RAW-CR2:                   629
RAW-CRW:                 10978
RAW-DNG:                     4
RAW-NEF:                 25526
TIFF:                      686
Gesamtzahl der Einträge: 95665
Alben:                    1481
Stichwörter:                43
Datenbanktreiber:      QSQLITE

In 2009, I started producing (quite large) panoramas with HUGIN

If I start > EXTRA > "writing all metadata in picture", the writing speed is
quite constant, irrespective(!!) several different file-formats.

After about 3 hours(?), my computer witch to screen saving modus.
When continuing the writing procedure again, the writing speed _decreased_
significantly.

Please have a look at attached csv-file. Date show a knee in the curve- why??

- Is there a real reason for this effect?
  (emptying a cache and not able to use it again if re-start writing, e.g.!?)  

- Why digiKam cannot re-gain it writing speed again?

Something keeps on beeing strange with writing metadata, I guess.
Can you answer my questions?


Axel

Reproducible: Always

Steps to Reproduce:
just start DK,
start writing metadata, and wait for set-on of screensaver



OS: Linux (i686) release 2.6.35-28-generic-pae
Compiler: cc

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=269467


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[hidden email],
                   |                            |[hidden email]
          Component|general                     |Metadata




--- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2011-03-29 11:09:58 ---
Writing metadata to file is delegate to Exiv2 library.

Which version you use ? Go to Help/Components Info for details.

I CC Andreas Huggel for info. He is Exiv2 lead developer.

Gilles Caulier

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[Axel Krebs]

https://bugs.kde.org/show_bug.cgi?id=269467





--- Comment #2 from Axel Krebs <axel krebs t-online de>  2011-03-30 07:52:52 ---
Am 29.03.2011 11:10, schrieb Gilles Caulier:

> https://bugs.kde.org/show_bug.cgi?id=269467
>
>
> Gilles Caulier<[hidden email]>  changed:
>
>             What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                   CC|                            |[hidden email],
>                     |                            |[hidden email]
>            Component|general                     |Metadata
>
>
>
>
> --- Comment #1 from Gilles Caulier<caulier gilles gmail com>   2011-03-29 11:09:58 ---
> Writing metadata to file is delegate to Exiv2 library.
>
> Which version you use ? Go to Help/Components Info for details.
>
> I CC Andreas Huggel for info. He is Exiv2 lead developer.
>
> Gilles Caulier
>

Gilles,

Thank you for information.

KOMPONENTS
"writing in cache" ("Zwischenablage") does _not_ work; please compare to
screenshot.

STATISTICS
digiKam version 2.0.0-beta4
AVI:         59
GIF:         99
JPG:         57275
PNG:         624
RAW-CR2:     629
RAW-CRW:     10978
RAW-DNG:     4
RAW-NEF:     25723
TIFF:         687
Gesamtzahl der Einträge: 96078
:
Alben:         1491
Stichwörter:     44
:
Datenbanktreiber: QSQLITE

Thank you,


Axel

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=269467





--- Comment #3 from Gilles Caulier <caulier gilles gmail com>  2011-03-30 08:49:11 ---
You copy the wrong help components info dialog contents. We don't want database
statistic, but hte list of shared libs used by digiKam

Gilles Caulier

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[Axel Krebs]

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--- Comment #4 from Axel Krebs <axel krebs t-online de>  2011-03-30 09:01:44 ---
Am 30.03.2011 08:49, schrieb Gilles Caulier:

> https://bugs.kde.org/show_bug.cgi?id=269467
>
>
>
>
>
> --- Comment #3 from Gilles Caulier<caulier gilles gmail com>   2011-03-30 08:49:11 ---
> You copy the wrong help components info dialog contents. We don't want database
> statistic, but hte list of shared libs used by digiKam
>
> Gilles Caulier
>

Gilles:

I tried to copy the help/component info.

As I explained already, "Copy to Clipboard" does _not_ work with this
info (this would be an independent new bug!).

For this reason, I screencopied the component-data; please compare
(again) with attachment.

Hope this helps?


Axel

Encl.

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--- Comment #5 from Gilles Caulier <caulier gilles gmail com>  2011-03-30 09:22:16 ---
There is no screen-shoot of Help/component info dialog attached in this file.

Gilles Caulier

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[Axel Krebs]

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--- Comment #6 from Axel Krebs <axel krebs t-online de>  2011-03-30 09:51:43 ---
Created an attachment (id=58454)
 --> (http://bugs.kde.org/attachment.cgi?id=58454)
requested component information from help menu

I answered your eMail within Thunderbird _directly_, without login. Therefore,
I assume, my email was filtered for my screenshot.

Hope, it's fine, now!

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--- Comment #7 from Gilles Caulier <caulier gilles gmail com>  2011-03-30 09:53:06 ---
Yes Exiv2 0.21.1...

Gilles Caulier

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[Gilles Caulier-4]

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--- Comment #8 from Gilles Caulier <[hidden email]> ---
In last digiKam 3.5.0, writting metadata have been parallelized with multi-core
CPU. Can you review this file with this version ?

Gilles Caulier

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[Gilles Caulier-4]

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #9 from Gilles Caulier <[hidden email]> ---


*** This bug has been marked as a duplicate of bug 283013 ***

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[Gilles Caulier-4]

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--- Comment #10 from Gilles Caulier <[hidden email]> ---
I set this file as duplicate of bug #283013 which have been closed as UPSTREAM.

All writting metadata improvement can be only done in the future through Exiv2
shared library.

Please open a file in Exiv2 bugzilla about this topic.

Gilles Caulier

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