[digiKam-users] Just over 100k photos - mysql internal or sqlite

Gilles Caulier caulier.gilles at gmail.com
Wed May 29 13:30:57 BST 2019

Across the network, sqlite is not the problem, as you CANNOT store the
database on a network file system. It must be in local. Only the collection
can be on a remote storage.

So the network bandwith usable to consult the collections is the real

With a remote Mysql, you use more bandwith with the database.

Gilles Caulier

Le mer. 29 mai 2019 à 14:27, Mark Otway <mark at otway.com> a écrit :

> I found both sqlite and mysql were equally slow and painful with a
> collection of 400k images which are stored across the network. ;)
> On Wed, 29 May 2019 at 13:02, Gilles Caulier <caulier.gilles at gmail.com>
> wrote:
>> Hi,
>> At home, my collection is over 250.000 files with sqlite. Database and
>> files are stored on SSD and it's enough fast.
>> GillesC aulier
>> Le mer. 29 mai 2019 à 12:24, Dougie Nisbet <dougie at katsura.uk> a écrit :
>>> Since I'm just starting out with digikam I thought this was the time to
>>> experiment with migrating to mysql. On the configuration screen digiKam can
>>> find the binary for mysql_install_db but not mysqld. mysqld is installed
>>> and when I use 'find' to tell it that the binary is in /usr/sbin/mysqld it
>>> looks promising.
>>> However, trying to migrate the database gives the pop-up error window:
>>> An error occurred during the internal server start.
>>> Details: Could not start database initialiser.
>>> Executable: mysql_install_db
>>> Arguments: --datadir=/store1/images/.mysql.digikam/db_data,
>>> --defaults-file=/tmp/.mount_digikaJbT7bS/usr/share/digikam/database/mysql-global.conf
>>> Process error: Unknown error
>>> and on the command line I see:
>>> Digikam::DatabaseServer::processErrorLog: Arguments:
>>> "--datadir=/store1/images/.mysql.digikam/db_data,
>>> --defaults-file=/tmp/.mount_digikaJbT7bS/usr/share/digikam/database/mysql-global.conf"
>>> Digikam::DatabaseServer::processErrorLog: Stdout: "Neither host 'office'
>>> nor 'localhost' could be looked up with\n'/usr/sbin/resolveip'\nPlease
>>> configure the 'hostname' command to return a correct\nhostname.\nIf you
>>> want to solve this at a later stage, restart this script\nwith the --force
>>> option\n\nThe latest information about mysql_install_db is available
>>> at\nhttps://
>>> mariadb.com/kb/en/installing-system-tables-mysql_install_db\n
>>> <http://mariadb.com/kb/en/installing-system-tables-mysql_install_db%5Cn>
>>> "
>>> which is a bit off. resolveip is a command I didn't know existed but
>>> running it returns a local IP address for my host.
>>> Performance using sqlite seems ok, and at just over 100k images I'm
>>> probably a borderline case so I thought I would try the mysql database
>>> option out of curiosity.
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