nextcloud-docs/admin_manual/configuration_server/config_sample_php_parameters.rst

=====================
Config.php Parameters
=====================

ownCloud uses the ``config/config.php`` file to control server operations.
``config/config.sample.php`` lists all the configurable parameters within
ownCloud, along with example or default values. This document provides a more
detailed reference. Most options are configurable on your Admin page, so it
is usually not necessary to edit ``config/config.php``.

.. note:: The installer creates a configuration containing the essential parameters.
   Only manually add configuration parameters to ``config/config.php`` if you need to
   use a special value for a parameter. **Do not copy everything from**
   ``config/config.sample.php`` **. Only enter the parameters you wish to modify!**

ownCloud supports loading configuration parameters from multiple files.
You can add arbitrary files ending with :file:`.config.php` in the :file:`config/`
directory, for example you could place your email server configuration
in :file:`email.config.php`. This allows you to easily create and manage
custom configurations, or to divide a large complex configuration file 
into a set of smaller files. These custom files are not overwritten by 
ownCloud, and the values in these files take precedence over :file:`config.php`.

.. The following section is auto-generated from 
.. https://github.com/owncloud/core/blob/master/config/config.sample.php
.. Do not edit this file; edit the source file in core
.. DEFAULT_SECTION_START


Default Parameters
------------------

These parameters are configured by the ownCloud installer, and are required
for your ownCloud server to operate.


::

	'instanceid' => '',

This is a unique identifier for your ownCloud installation, created
automatically by the installer. This example is for documentation only,
and you should never use it because it will not work. A valid ``instanceid``
is created when you install ownCloud.

'instanceid' => 'd3c944a9a',

::

	'passwordsalt' => '',

The salt used to hash all passwords, auto-generated by the ownCloud
installer. (There are also per-user salts.) If you lose this salt you lose
all your passwords. This example is for documentation only, and you should
never use it.

::

	'trusted_domains' =>
	  array (
	    'demo.example.org',
	    'otherdomain.example.org',
	  ),

Your list of trusted domains that users can log into. Specifying trusted
domains prevents host header poisoning. Do not remove this, as it performs
necessary security checks.

::

	'datadirectory' => '/var/www/owncloud/data',

Where user files are stored; this defaults to ``data/`` in the ownCloud
directory. The SQLite database is also stored here, when you use SQLite.

(SQLite is not available in ownCloud Enterprise Edition)

::

	'version' => '',

The current version number of your ownCloud installation. This is set up
during installation and update, so you shouldn't need to change it.

::

	'dbtype' => 'sqlite',

Identifies the database used with this installation. See also config option
``supportedDatabases``

Available:
	- sqlite (SQLite3 - Not in Enterprise Edition)
	- mysql (MySQL/MariaDB)
	- pgsql (PostgreSQL)
	- oci (Oracle - Enterprise Edition Only)

::

	'dbhost' => '',

Your host server name, for example ``localhost``, ``hostname``,
``hostname.example.com``, or the IP address. To specify a port use
``hostname:####``; to specify a Unix socket use
``localhost:/path/to/socket``.

::

	'dbname' => 'owncloud',

The name of the ownCloud database, which is set during installation. You
should not need to change this.

::

	'dbuser' => '',

The user that ownCloud uses to write to the database. This must be unique
across ownCloud instances using the same SQL database. This is set up during
installation, so you shouldn't need to change it.

::

	'dbpassword' => '',

The password for the database user. This is set up during installation, so
you shouldn't need to change it.

::

	'dbtableprefix' => '',

Prefix for the ownCloud tables in the database.

::

	'installed' => false,

Indicates whether the ownCloud instance was installed successfully; ``true``
indicates a successful installation, and ``false`` indicates an unsuccessful
installation.

.. DEFAULT_SECTION_END
.. Generated content above. Don't change this.

Default config.php Examples
---------------------------
When you use SQLite as your ownCloud database, your ``config.php`` looks like
this after installation. The SQLite database is stored in your ownCloud
``data/`` directory. SQLite is a simple, lightweight embedded database that
is good for testing and for simple installations, but for production ownCloud
systems you should use MySQL, MariaDB, or PosgreSQL.

::

  <?php
  $CONFIG = array (
    'instanceid' => 'occ6f7365735',
    'passwordsalt' => '2c5778476346786306303',
    'trusted_domains' =>
    array (
      0 => 'localhost',
      1 => 'studio',
    ),
    'datadirectory' => '/var/www/owncloud/data',
    'dbtype' => 'sqlite3',
    'version' => '7.0.2.1',
    'installed' => true,
  );

This example is from a new ownCloud installation using MariaDB::


  <?php
  $CONFIG = array (
    'instanceid' => 'oc8c0fd71e03',
    'passwordsalt' => '515a13302a6b3950a9d0fdb970191a',
    'trusted_domains' =>
    array (
      0 => 'localhost',
      1 => 'studio',
      2 => '192.168.10.155'
    ),
    'datadirectory' => '/var/www/owncloud/data',
    'dbtype' => 'mysql',
     'version' => '7.0.2.1',
    'dbname' => 'owncloud',
    'dbhost' => 'localhost',
    'dbtableprefix' => 'oc_',
    'dbuser' => 'oc_carla',
    'dbpassword' => '67336bcdf7630dd80b2b81a413d07',
    'installed' => true,
  );

.. Generated content below. Don't change this.
.. ALL_OTHER_SECTIONS_START


User Experience
---------------

These optional parameters control some aspects of the user interface. Default
values, where present, are shown.


::

	'default_language' => 'en',

This sets the default language on your ownCloud server, using ISO_639-1
language codes such as ``en`` for English, ``de`` for German, and ``fr`` for
French. It overrides automatic language detection on public pages like login
or shared items. User's language preferences configured under "personal ->
language" override this setting after they have logged in.

::

	'defaultapp' => 'files',

Set the default app to open on login. Use the app names as they appear in the
URL after clicking them in the Apps menu, such as documents, calendar, and
gallery. You can use a comma-separated list of app names, so if the first
app is not enabled for a user then ownCloud will try the second one, and so
on. If no enabled apps are found it defaults to the Files app.

::

	'knowledgebaseenabled' => true,

``true`` enables the Help menu item in the user menu (top right of the
ownCloud Web interface). ``false`` removes the Help item.

::

	'enable_avatars' => true,

``true`` enables avatars, or user profile photos. These appear on the User
page, on user's Personal pages and are used by some apps (contacts, mail,
etc). ``false`` disables them.

::

	'allow_user_to_change_display_name' => true,

``true`` allows users to change their display names (on their Personal
pages), and ``false`` prevents them from changing their display names.

::

	'remember_login_cookie_lifetime' => 60*60*24*15,

Lifetime of the remember login cookie, which is set when the user clicks the
``remember`` checkbox on the login screen. The default is 15 days, expressed
in seconds.

::

	'session_lifetime' => 60 * 60 * 24,

The lifetime of a session after inactivity; the default is 24 hours,
expressed in seconds.

::

	'session_keepalive' => true,

Enable or disable session keep-alive when a user is logged in to the Web UI.

Enabling this sends a "heartbeat" to the server to keep it from timing out.

::

	'skeletondirectory' => '/path/to/owncloud/core/skeleton',

The directory where the skeleton files are located. These files will be
copied to the data directory of new users. Leave empty to not copy any
skeleton files.

::

	'user_backends' => array(
		array(
			'class' => 'OC_User_IMAP',
			'arguments' => array('{imap.gmail.com:993/imap/ssl}INBOX')
		)
	),

The ``user_backends`` app (which needs to be enabled first) allows you to
configure alternate authentication backends. Supported backends are:
IMAP (OC_User_IMAP), SMB (OC_User_SMB), and FTP (OC_User_FTP).

Mail Parameters
---------------

These configure the email settings for ownCloud notifications and password
resets.


::

	'mail_domain' => 'example.com',

The return address that you want to appear on emails sent by the ownCloud
server, for example ``oc-admin@example.com``, substituting your own domain,
of course.

::

	'mail_from_address' => 'owncloud',

FROM address that overrides the built-in ``sharing-noreply`` and
``lostpassword-noreply`` FROM addresses.

::

	'mail_smtpdebug' => false,

Enable SMTP class debugging.

::

	'mail_smtpmode' => 'sendmail',

Which mode to use for sending mail: ``sendmail``, ``smtp``, ``qmail`` or
``php``.

If you are using local or remote SMTP, set this to ``smtp``.

If you are using PHP mail you must have an installed and working email system
on the server. The program used to send email is defined in the ``php.ini``
file.

For the ``sendmail`` option you need an installed and working email system on
the server, with ``/usr/sbin/sendmail`` installed on your Unix system.

For ``qmail`` the binary is /var/qmail/bin/sendmail, and it must be installed
on your Unix system.

::

	'mail_smtphost' => '127.0.0.1',

This depends on ``mail_smtpmode``. Specify the IP address of your mail
server host. This may contain multiple hosts separated by a semi-colon. If
you need to specify the port number append it to the IP address separated by
a colon, like this: ``127.0.0.1:24``.

::

	'mail_smtpport' => 25,

This depends on ``mail_smtpmode``. Specify the port for sending mail.

::

	'mail_smtptimeout' => 10,

This depends on ``mail_smtpmode``. This sets the SMTP server timeout, in
seconds. You may need to increase this if you are running an anti-malware or
spam scanner.

::

	'mail_smtpsecure' => '',

This depends on ``mail_smtpmode``. Specify when you are using ``ssl`` or
``tls``, or leave empty for no encryption.

::

	'mail_smtpauth' => false,

This depends on ``mail_smtpmode``. Change this to ``true`` if your mail
server requires authentication.

::

	'mail_smtpauthtype' => 'LOGIN',

This depends on ``mail_smtpmode``. If SMTP authentication is required, choose
the authentication type as ``LOGIN`` (default) or ``PLAIN``.

::

	'mail_smtpname' => '',

This depends on ``mail_smtpauth``. Specify the username for authenticating to
the SMTP server.

::

	'mail_smtppassword' => '',

This depends on ``mail_smtpauth``. Specify the password for authenticating to
the SMTP server.

Proxy Configurations
--------------------


::

	'overwritehost' => '',

The automatic hostname detection of ownCloud can fail in certain reverse
proxy and CLI/cron situations. This option allows you to manually override
the automatic detection; for example ``www.example.com``, or specify the port
``www.example.com:8080``.

::

	'overwriteprotocol' => '',

When generating URLs, ownCloud attempts to detect whether the server is
accessed via ``https`` or ``http``. However, if ownCloud is behind a proxy
and the proxy handles the ``https`` calls, ownCloud would not know that
``ssl`` is in use, which would result in incorrect URLs being generated.

Valid values are ``http`` and ``https``.

::

	'overwritewebroot' => '',

ownCloud attempts to detect the webroot for generating URLs automatically.

For example, if ``www.example.com/owncloud`` is the URL pointing to the
ownCloud instance, the webroot is ``/owncloud``. When proxies are in use, it
may be difficult for ownCloud to detect this parameter, resulting in invalid
URLs.

::

	'overwritecondaddr' => '',

This option allows you to define a manual override condition as a regular
expression for the remote IP address. For example, defining a range of IP
addresses starting with ``10.0.0.`` and ending with 1 to 3:
``^10\.0\.0\.[1-3]$``

::

	'overwrite.cli.url' => '',

Use this configuration parameter to specify the base URL for any URLs which
are generated within ownCloud using any kind of command line tools (cron or
occ). The value should contain the full base URL:
``https://www.example.com/owncloud``

::

	'proxy' => '',

The URL of your proxy server, for example ``proxy.example.com:8081``.

::

	'proxyuserpwd' => '',

The optional authentication for the proxy to use to connect to the internet.

The format is: ``username:password``.

Deleted Items (trash bin)
-------------------------

These parameters control the Deleted files app.


::

	'trashbin_retention_obligation' => 'auto',

If the trash bin app is enabled (default), this setting defines the policy
for when files and folders in the trash bin will be permanently deleted.

The app allows for two settings, a minimum time for trash bin retention,
and a maximum time for trash bin retention.
Minimum time is the number of days a file will be kept, after which it
may be deleted. Maximum time is the number of days at which it is guaranteed
to be deleted.
Both minimum and maximum times can be set together to explicitly define
file and folder deletion. For migration purposes, this setting is installed
initially set to "auto", which is equivalent to the default setting in
ownCloud 8.1 and before.

Available values:

* ``auto``
    default setting. keeps files and folders in the trash bin for 30 days
    and automatically deletes anytime after that if space is needed (note:
    files may not be deleted if space is not needed).
* ``D, auto``
    keeps files and folders in the trash bin for D+ days, delete anytime if
    space needed (note: files may not be deleted if space is not needed)
* ``auto, D``
    delete all files in the trash bin that are older than D days
    automatically, delete other files anytime if space needed
* ``D1, D2``
    keep files and folders the in trash bin for at least D1 days and
    delete when exceeds D2 days
* ``disabled``
    trash bin auto clean disabled, files and folders will be kept forever

::

	'versions_retention_obligation' => 'auto',

If the versions app is enabled (default), this setting defines the policy
for when versions will be permanently deleted.

The app allows for two settings, a minimum time for version retention,
and a maximum time for version retention.
Minimum time is the number of days a version will be kept, after which it
may be deleted. Maximum time is the number of days at which it is guaranteed
to be deleted.
Both minimum and maximum times can be set together to explicitly define
version deletion. For migration purposes, this setting is installed
initially set to "auto", which is equivalent to the default setting in
ownCloud 8.1 and before.

Available values:

* ``auto``
    default setting. Automatically expire versions according to expire
    rules. Please refer to Files_versions online documentation for more
    info.
* ``D, auto``
    keep versions at least for D days, apply expire rules to all versions
    that are older than D days
* ``auto, D``
    delete all versions that are older than D days automatically, delete
    other versions according to expire rules
* ``D1, D2``
    keep versions for at least D1 days and delete when exceeds D2 days
* ``disabled``
    versions auto clean disabled, versions will be kept forever

ownCloud Verifications
----------------------

ownCloud performs several verification checks. There are two options,
``true`` and ``false``.


::

	'appcodechecker' => true,

Checks an app before install whether it uses private APIs instead of the
proper public APIs. If this is set to true it will only allow to install or
enable apps that pass this check.

::

	'updatechecker' => true,

Check if ownCloud is up-to-date and shows a notification if a new version is
available.

::

	'has_internet_connection' => true,

Is ownCloud connected to the Internet or running in a closed network?

::

	'check_for_working_webdav' => true,

Allows ownCloud to verify a working WebDAV connection. This is done by
attempting to make a WebDAV request from PHP.

::

	'check_for_working_htaccess' => true,

This is a crucial security check on Apache servers that should always be set
to ``true``. This verifies that the ``.htaccess`` file is writable and works.

If it is not, then any options controlled by ``.htaccess``, such as large
file uploads, will not work. It also runs checks on the ``data/`` directory,
which verifies that it can't be accessed directly through the web server.

::

	'config_is_read_only' => false,

In certain environments it is desired to have a read-only config file.

When this switch is set to ``true`` ownCloud will not verify whether the
configuration is writable. However, it will not be possible to configure
all options via the web-interface. Furthermore, when updating ownCloud
it is required to make the config file writable again for the update
process.

Logging
-------


::

	'log_type' => 'owncloud',

By default the ownCloud logs are sent to the ``owncloud.log`` file in the
default ownCloud data directory.

If syslogging is desired, set this parameter to ``syslog``.
Setting this parameter to ``errorlog`` will use the PHP error_log function
for logging.

::

	'logfile' => '/var/log/owncloud.log',

Log file path for the ownCloud logging type.

Defaults to ``[datadirectory]/owncloud.log``

::

	'loglevel' => 2,

Loglevel to start logging at. Valid values are: 0 = Debug, 1 = Info, 2 =
Warning, 3 = Error, and 4 = Fatal. The default value is Warning.

::

	'syslog_tag' => 'ownCloud',

If you maintain different instances and aggregate the logs, you may want
to distinguish between them. ``syslog_tag`` can be set per instance
with a unique id. Only available if ``log_type`` is set to ``syslog``.

The default value is ``ownCloud``.

::

	'log.condition' => [
		'shared_secret' => '57b58edb6637fe3059b3595cf9c41b9',
		'users' => ['sample-user'],
		'apps' => ['files'],
	],

Log condition for log level increase based on conditions. Once one of these
conditions is met, the required log level is set to debug. This allows to
debug specific requests, users or apps

Supported conditions:
 - ``shared_secret``: if a request parameter with the name `log_secret` is set to
               this value the condition is met
 - ``users``:  if the current request is done by one of the specified users,
               this condition is met
 - ``apps``:   if the log message is invoked by one of the specified apps,
               this condition is met

Defaults to an empty array.

::

	'logdateformat' => 'F d, Y H:i:s',

This uses PHP.date formatting; see http://php.net/manual/en/function.date.php

::

	'logtimezone' => 'Europe/Berlin',

The default timezone for logfiles is UTC. You may change this; see
http://php.net/manual/en/timezones.php

::

	'log_query' => false,

Append all database queries and parameters to the log file. Use this only for
debugging, as your logfile will become huge.

::

	'cron_log' => true,

Log successful cron runs.

::

	'cron.lockfile.location' => '',

Location of the lock file for cron executions can be specified here.

Default is within the tmp directory. The file is named in the following way:
owncloud-server-$INSTANCEID-cron.lock
where $INSTANCEID is the string specified in the ``instanceid`` field.
Because the cron lock file is accessed at regular intervals, it may prevent
enabled disk drives from spinning down. A different location for this file
can solve such issues.

::

	'log_rotate_size' => false,

Enables log rotation and limits the total size of logfiles. The default is 0,
or no rotation. Specify a size in bytes, for example 104857600 (100 megabytes
= 100 * 1024 * 1024 bytes). A new logfile is created with a new name when the
old logfile reaches your limit. If a rotated log file is already present, it
will be overwritten.

Alternate Code Locations
------------------------

Some of the ownCloud code may be stored in alternate locations.


::

	'3rdpartyroot' => '',

ownCloud uses some 3rd party PHP components to provide certain functionality.

These components are shipped as part of the software package and reside in
``owncloud/3rdparty``. Use this option to configure a different location.
For example, if your location is /var/www/owncloud/foo/3rdparty, then the
correct configuration is '3rdpartyroot' => '/var/www/owncloud/foo/',

::

	'3rdpartyurl' => '',

If you have an alternate ``3rdpartyroot``, you must also configure the URL as
seen by a Web browser.

::

	'customclient_desktop' =>
		'http://owncloud.org/sync-clients/',
	'customclient_android' =>
		'https://play.google.com/store/apps/details?id=com.owncloud.android',
	'customclient_ios' =>
		'https://itunes.apple.com/us/app/owncloud/id543672169?mt=8',

This section is for configuring the download links for ownCloud clients, as
seen in the first-run wizard and on Personal pages.

Apps
----

Options for the Apps folder, Apps store, and App code checker.


::

	'appstoreenabled' => true,

When enabled, admins may install apps from the ownCloud app store.

::

	'appstoreurl' => 'https://api.owncloud.com/v1',

The URL of the appstore to use.

::

	'appstore.experimental.enabled' => false,

Whether to show experimental apps in the appstore interface

Experimental apps are not checked for security issues and are new or known
to be unstable and under heavy development. Installing these can cause data
loss or security breaches.

::

	'apps_paths' => array(
		array(
			'path'=> '/var/www/owncloud/apps',
			'url' => '/apps',
			'writable' => true,
		),
	),

Use the ``apps_paths`` parameter to set the location of the Apps directory,
which should be scanned for available apps, and where user-specific apps
should be installed from the Apps store. The ``path`` defines the absolute
file system path to the app folder. The key ``url`` defines the HTTP web path
to that folder, starting from the ownCloud web root. The key ``writable``
indicates if a web server can write files to that folder.

::

	'appcodechecker' => true,

Checks an app before install whether it uses private APIs instead of the
proper public APIs. If this is set to true it will only allow to install or
enable apps that pass this check.





Previews
--------

ownCloud supports previews of image files, the covers of MP3 files, and text
files. These options control enabling and disabling previews, and thumbnail
size.


::

	'enable_previews' => true,

By default, ownCloud can generate previews for the following filetypes:

- Image files
- Covers of MP3 files
- Text documents

Valid values are ``true``, to enable previews, or
``false``, to disable previews

::

	'preview_max_x' => 2048,

The maximum width, in pixels, of a preview. A value of ``null`` means there
is no limit.

::

	'preview_max_y' => 2048,

The maximum height, in pixels, of a preview. A value of ``null`` means there
is no limit.

::

	'preview_max_scale_factor' => 10,

If a lot of small pictures are stored on the ownCloud instance and the
preview system generates blurry previews, you might want to consider setting
a maximum scale factor. By default, pictures are upscaled to 10 times the
original size. A value of ``1`` or ``null`` disables scaling.

::

	'preview_max_filesize_image' => 50,

max file size for generating image previews with imagegd (default behaviour)
If the image is bigger, it'll try other preview generators,
but will most likely show the default mimetype icon

Value represents the maximum filesize in megabytes
Default is 50
Set to -1 for no limit

::

	'preview_libreoffice_path' => '/usr/bin/libreoffice',

custom path for LibreOffice/OpenOffice binary

::

	'preview_office_cl_parameters' =>
		' --headless --nologo --nofirststartwizard --invisible --norestore '.
		'-convert-to pdf -outdir ',

Use this if LibreOffice/OpenOffice requires additional arguments.

::

	'enabledPreviewProviders' => array(
		'OC\Preview\PNG',
		'OC\Preview\JPEG',
		'OC\Preview\GIF',
		'OC\Preview\BMP',
		'OC\Preview\XBitmap',
		'OC\Preview\MP3',
		'OC\Preview\TXT',
		'OC\Preview\MarkDown'
	),

Only register providers that have been explicitly enabled

The following providers are enabled by default:

 - OC\\Preview\\PNG
 - OC\\Preview\\JPEG
 - OC\\Preview\\GIF
 - OC\\Preview\\BMP
 - OC\\Preview\\XBitmap
 - OC\\Preview\\MarkDown
 - OC\\Preview\\MP3
 - OC\\Preview\\TXT

The following providers are disabled by default due to performance or privacy
concerns:

 - OC\\Preview\\Illustrator
 - OC\\Preview\\Movie
 - OC\\Preview\\MSOffice2003
 - OC\\Preview\\MSOffice2007
 - OC\\Preview\\MSOfficeDoc
 - OC\\Preview\\OpenDocument
 - OC\\Preview\\PDF
 - OC\\Preview\\Photoshop
 - OC\\Preview\\Postscript
 - OC\\Preview\\StarOffice
 - OC\\Preview\\SVG
 - OC\\Preview\\TIFF
 - OC\\Preview\\Font

.. note:: Troubleshooting steps for the MS Word previews are available
   at the :doc:`../configuration_files/collaborative_documents_configuration`
   section of the Administrators Manual.

The following providers are not available in Microsoft Windows:

 - OC\\Preview\\Movie
 - OC\\Preview\\MSOfficeDoc
 - OC\\Preview\\MSOffice2003
 - OC\\Preview\\MSOffice2007
 - OC\\Preview\\OpenDocument
 - OC\\Preview\\StarOffice

LDAP
----

Global settings used by LDAP User and Group Backend


::

	'ldapUserCleanupInterval' => 51,

defines the interval in minutes for the background job that checks user
existence and marks them as ready to be cleaned up. The number is always
minutes. Setting it to 0 disables the feature.

See command line (occ) methods ldap:show-remnants and user:delete

::

	'enforce_home_folder_naming_rule' => true,

Enforce the existence of the home folder naming rule for all users

Following scenario:
 * a home folder naming rule is set in LDAP advanced settings
 * a user doesn't have the home folder naming rule attribute set

If this is set to **true** (default) it will NOT fallback to the core's
default naming rule of using the internal user ID as home folder name.

If this is set to **false** it will fallback for the users without the
attribute set to naming the home folder like the internal user ID.

Maintenance
-----------

These options are for halting user activity when you are performing server
maintenance.


::

	'maintenance' => false,

Enable maintenance mode to disable ownCloud

If you want to prevent users from logging in to ownCloud before you start
doing some maintenance work, you need to set the value of the maintenance
parameter to true. Please keep in mind that users who are already logged-in
are kicked out of ownCloud instantly.

::

	'singleuser' => false,

When set to ``true``, the ownCloud instance will be unavailable for all users
who are not in the ``admin`` group.

SSL
---


::

	'openssl' => array(
		'config' => '/absolute/location/of/openssl.cnf',
	),

Extra SSL options to be used for configuration.

Memory caching backend configuration
------------------------------------

Available cache backends:

* ``\OC\Memcache\APC``        Alternative PHP Cache backend
* ``\OC\Memcache\APCu``       APC user backend
* ``\OC\Memcache\ArrayCache`` In-memory array-based backend (not recommended)
* ``\OC\Memcache\Memcached``  Memcached backend
* ``\OC\Memcache\Redis``      Redis backend
* ``\OC\Memcache\XCache``     XCache backend

Advice on choosing between the various backends:

* APCu should be easiest to install. Almost all distributions have packages.
  Use this for single user environment for all caches.
* Use Redis or Memcached for distributed environments.
  For the local cache (you can configure two) take APCu.


::

	'memcache.local' => '\OC\Memcache\APCu',

Memory caching backend for locally stored data

* Used for host-specific data, e.g. file paths

::

	'memcache.distributed' => '\OC\Memcache\Memcached',

Memory caching backend for distributed data

* Used for installation-specific data, e.g. database caching
* If unset, defaults to the value of memcache.local

::

	'redis' => array(
		'host' => 'localhost', // can also be a unix domain socket: '/tmp/redis.sock'
		'port' => 6379,
		'timeout' => 0.0,
		'password' => '', // Optional, if not defined no password will be used.
		'dbindex' => 0, // Optional, if undefined SELECT will not run and will use Redis Server's default DB Index.
	),

Connection details for redis to use for memory caching.

For enhanced security it is recommended to configure Redis
to require a password. See http://redis.io/topics/security
for more information.

::

	'memcached_servers' => array(
		// hostname, port and optional weight. Also see:
		// http://www.php.net/manual/en/memcached.addservers.php
		// http://www.php.net/manual/en/memcached.addserver.php
		array('localhost', 11211),
		//array('other.host.local', 11211),
	),

Server details for one or more memcached servers to use for memory caching.

::

	'cache_path' => '',

Location of the cache folder, defaults to ``data/$user/cache`` where
``$user`` is the current user. When specified, the format will change to
``$cache_path/$user`` where ``$cache_path`` is the configured cache directory
and ``$user`` is the user.

Using Object Store with ownCloud
--------------------------------


::

	'objectstore' => array(
		'class' => 'OC\\Files\\ObjectStore\\Swift',
		'arguments' => array(
			// trystack will user your facebook id as the user name
			'username' => 'facebook100000123456789',
			// in the trystack dashboard go to user -> settings -> API Password to
			// generate a password
			'password' => 'Secr3tPaSSWoRdt7',
			// must already exist in the objectstore, name can be different
			'container' => 'owncloud',
			// create the container if it does not exist. default is false
			'autocreate' => true,
			// required, dev-/trystack defaults to 'RegionOne'
			'region' => 'RegionOne',
			// The Identity / Keystone endpoint
			'url' => 'http://8.21.28.222:5000/v2.0',
			// required on dev-/trystack
			'tenantName' => 'facebook100000123456789',
			// dev-/trystack uses swift by default, the lib defaults to 'cloudFiles'
			// if omitted
			'serviceName' => 'swift',
		),
	),

This example shows how to configure ownCloud to store all files in a
swift object storage.

It is important to note that ownCloud in object store mode will expect
exclusive access to the object store container because it only stores the
binary data for each file. The metadata is currently kept in the local
database for performance reasons.

WARNING: The current implementation is incompatible with any app that uses
direct file IO and circumvents our virtual filesystem. That includes
Encryption and Gallery. Gallery will store thumbnails directly in the
filesystem and encryption will cause severe overhead because key files need
to be fetched in addition to any requested file.

One way to test is applying for a trystack account at http://trystack.org/

All other config options
------------------------


::

	'dbdriveroptions' => array(
		PDO::MYSQL_ATTR_SSL_CA => '/file/path/to/ca_cert.pem',
	),

Additional driver options for the database connection, eg. to enable SSL
encryption in MySQL.

::

	'sqlite.journal_mode' => 'DELETE',

sqlite3 journal mode can be specified using this config parameter - can be
'WAL' or 'DELETE' see for more details https://www.sqlite.org/wal.html

::

	'supportedDatabases' => array(
		'sqlite',
		'mysql',
		'pgsql',
		'oci',
	),

Database types that are supported for installation.

Available:
	- sqlite (SQLite3 - Not in Enterprise Edition)
	- mysql (MySQL)
	- pgsql (PostgreSQL)
	- oci (Oracle - Enterprise Edition Only)

::

	'tempdirectory' => '/tmp/owncloudtemp',

Override where ownCloud stores temporary files. Useful in situations where
the system temporary directory is on a limited space ramdisk or is otherwise
restricted, or if external storages which do not support streaming are in
use.

The web server user must have write access to this directory.

::

	'hashingCost' => 10,

The hashing cost used by hashes generated by ownCloud
Using a higher value requires more time and CPU power to calculate the hashes

::

	'blacklisted_files' => array('.htaccess'),

Blacklist a specific file or files and disallow the upload of files
with this name. ``.htaccess`` is blocked by default.

WARNING: USE THIS ONLY IF YOU KNOW WHAT YOU ARE DOING.

::

	'share_folder' => '/',

Define a default folder for shared files and folders other than root.

::

	'theme' => '',

If you are applying a theme to ownCloud, enter the name of the theme here.

The default location for themes is ``owncloud/themes/``.

::

	'cipher' => 'AES-256-CFB',

The default cipher for encrypting files. Currently AES-128-CFB and
AES-256-CFB are supported.

::

	'minimum.supported.desktop.version' => '1.7.0',

The minimum ownCloud desktop client version that will be allowed to sync with
this server instance. All connections made from earlier clients will be denied
by the server. Defaults to the minimum officially supported ownCloud version at
the time of release of this server version.

When changing this, note that older unsupported versions of the ownCloud desktop
client may not function as expected, and could lead to permanent data loss for
clients or other unexpected results.

::

	'quota_include_external_storage' => false,

EXPERIMENTAL: option whether to include external storage in quota
calculation, defaults to false.

::

	'filesystem_check_changes' => 0,

Specifies how often the filesystem is checked for changes made outside
ownCloud.

0 -> Never check the filesystem for outside changes, provides a performance
increase when it's certain that no changes are made directly to the
filesystem

1 -> Check each file or folder at most once per request, recommended for
general use if outside changes might happen.

2 -> Check every time the filesystem is used, causes a performance hit when
using external storages, not recommended for regular use.

::

	'asset-pipeline.enabled' => false,

All css and js files will be served by the web server statically in one js
file and one css file if this is set to ``true``. This improves performance.

::

	'assetdirectory' => '/var/www/owncloud',

The parent of the directory where css and js assets will be stored if
pipelining is enabled; this defaults to the ownCloud directory. The assets
will be stored in a subdirectory of this directory named 'assets'. The
server *must* be configured to serve that directory as $WEBROOT/assets.

You will only likely need to change this if the main ownCloud directory
is not writeable by the web server in your configuration.

::

	'mount_file' => '/var/www/owncloud/data/mount.json',

Where ``mount.json`` file should be stored, defaults to ``data/mount.json``
in the ownCloud directory.

::

	'filesystem_cache_readonly' => false,

When ``true``, prevent ownCloud from changing the cache due to changes in the
filesystem for all storage.

::

	'secret' => '',

Secret used by ownCloud for various purposes, e.g. to encrypt data. If you
lose this string there will be data corruption.

::

	'trusted_proxies' => array('203.0.113.45', '198.51.100.128'),

List of trusted proxy servers

If you configure these also consider setting `forwarded_for_headers` which
otherwise defaults to `HTTP_X_FORWARDED_FOR` (the `X-Forwarded-For` header).

::

	'forwarded_for_headers' => array('HTTP_X_FORWARDED', 'HTTP_FORWARDED_FOR'),

Headers that should be trusted as client IP address in combination with
`trusted_proxies`. If the HTTP header looks like 'X-Forwarded-For', then use
'HTTP_X_FORWARDED_FOR' here.

If set incorrectly, a client can spoof their IP address as visible to
ownCloud, bypassing access controls and making logs useless!

Defaults to 'HTTP_X_FORWARED_FOR' if unset

::

	'max_filesize_animated_gifs_public_sharing' => 10,

max file size for animating gifs on public-sharing-site.

If the gif is bigger, it'll show a static preview

Value represents the maximum filesize in megabytes. Default is ``10``. Set to
``-1`` for no limit.

::

	'filelocking.enabled' => true,

Enables transactional file locking.

This is enabled by default.

Prevents concurrent processes from accessing the same files
at the same time. Can help prevent side effects that would
be caused by concurrent operations. Mainly relevant for
very large installations with many users working with
shared files.

::

	'memcache.locking' => '\\OC\\Memcache\\Redis',

Memory caching backend for file locking

Because most memcache backends can clean values without warning using redis
is highly recommended to *avoid data loss*.

::

	'debug' => false,

Set this ownCloud instance to debugging mode

Only enable this for local development and not in production environments
This will disable the minifier and outputs some additional debug information

::

	'copied_sample_config' => true,

This entry is just here to show a warning in case somebody copied the sample
configuration. DO NOT ADD THIS SWITCH TO YOUR CONFIGURATION!

If you, brave person, have read until here be aware that you should not
modify *ANY* settings in this file without reading the documentation.

.. ALL_OTHER_SECTIONS_END
.. Generated content above. Don't change this.

App config options
------------------

Retention for activities of the activity app:


::

	'activity_expire_days' => 365,

Every day a cron job is ran, which deletes all activities for all users
which are older then the number of days that is set for ``activity_expire_days``