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# Converting Database Type

SQLite is good for testing ownCloud, as well as small, single-user, ownCloud servers. But, it does not scale for large, multi-user sites. If you have an existing ownCloud installation which uses SQLite, and you want to convert to a better performing database, such as MySQL, MariaDB or PostgreSQL, you can use the ownCloud command line tool: occ.

Note

ownCloud Enterprise edition does not support SQLite.

## Run the conversion

After you have setup the new database, in the ownCloud root folder run the following command to convert the database to the new format:

    php occ db:convert-type [options] type username hostname database

Note

The converter searches for apps in your configured app folders and uses the schema definitions in the apps to create the new table. As a result, tables of removed apps will not be converted — even with option `--all-apps`

For example

    php occ db:convert-type --all-apps mysql oc_mysql_user 127.0.0.1 new_db_name

To successfully proceed with the conversion, you must type `yes` when prompted with the question `Continue with the conversion?` On success the converter will automatically configure the new database in your ownCloud config `config.php`.

## Unconvertible Tables

If you updated your ownCloud installation then the old tables, which are not used anymore, might still exist. The converter will tell you which ones.

    The following tables will not be converted:
    oc_permissions
    ...

You can ignore these tables. Here is a list of known old tables:

- oc_calendar_calendars
- oc_calendar_objects
- oc_calendar_share_calendar
- oc_calendar_share_event
- oc_fscache
- oc_log
- oc_media_albums
- oc_media_artists
- oc_media_sessions
- oc_media_songs
- oc_media_users
- oc_permissions
- oc_queuedtasks
- oc_sharing

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