Environment Variables

The behavior of the client can also be controlled using environment variables. The value of the environment variables overrides the values in the configuration file.

Note that most environment variables only exist for debugging or testing. They are not officially supported and may change from version to version. If you end up relying on a setting only available through an environment variable, please create a bug report.

The environment variables are:

Setting Default Description

OWNCLOUD_CHUNK_SIZE

10000000 (or 10 MB)

Specifies the initial chunk size of uploaded files in bytes. The client will dynamically adjust this size within the maximum and minimum bounds (see below).

OWNCLOUD_MAX_CHUNK_SIZE

100000000 (or 100 MB)

Specifies the maximum chunk size of uploaded files in bytes.

OWNCLOUD_MIN_CHUNK_SIZE

1000000 (or 1 MB)

Specifies the minimum chunk size of uploaded files in bytes.

OWNCLOUD_TARGET_CHUNK_UPLOAD_DURATION

60000

Target duration in milliseconds for chunk uploads. The client adjusts the chunk size until each chunk upload takes approximately this long. Set to 0 to disable dynamic chunk sizing.

OWNCLOUD_CHUNKING_NG

depend on server capability

Force-enable ("1") or force-disable ("0") the NG chunking algorithm.

OWNCLOUD_TIMEOUT

300

The timeout for network connections in seconds.

OWNCLOUD_CRITICAL_FREE_SPACE_BYTES

50*1000*1000 bytes

The minimum disk space needed for operation. A fatal error is raised if less free space is available.

OWNCLOUD_FREE_SPACE_BYTES

250*1000*1000 bytes

Downloads that would reduce the free space below this value are skipped. More information available under the "Low Disk Space" section.

OWNCLOUD_MAX_PARALLEL

6

Maximum number of parallel jobs.

OWNCLOUD_BLACKLIST_TIME_MIN

25

Minimum timeout, in seconds, for blacklisted files.

OWNCLOUD_BLACKLIST_TIME_MAX

24*60*60 (or one day)

Maximum timeout, in seconds, for blacklisted files.

OWNCLOUD_HTTP2_ENABLED

depend on Qt version

Force-enable ("1") or force-disable ("0") HTTP2 support. Note that HTTP2 use also depends on whether the server supports it.

OWNCLOUD_MINIMAL_TRAY_MENU

unset

If set a minimal tray menu is used. Helpful if a platform’s tray has problematic behavior.

OWNCLOUD_TRAY_UPDATE_WHILE_VISIBLE

0

Set to "1" to allow the tray menu to be updated while it’s visible to the user.

OWNCLOUD_FORCE_TRAY_SHOW_HIDE

unset

Set to "1" to reestablish the tray icon every time the menu changes.

OWNCLOUD_FORCE_TRAY_FAKE_DOUBLE_CLICK

unset

Set to "1" if single tray clicks sometimes get recognized as double clicks.

OWNCLOUD_FORCE_TRAY_MANUAL_VISIBILITY

unset

Set to "1" if the tray menu is flickering while opened.

OWNCLOUD_FORCE_TRAY_NO_ABOUT_TO_SHOW

unset

Set to "1" if the tray menu sometimes contains stale entries.

OWNCLOUD_FULL_LOCAL_DISCOVERY_INTERVAL

3600000 (1 hour)

Maximum time in milliseconds that fast local discovery is allowed for after a full local discovery. Set to 0 to always require full local discovery. Set to -1 to never require full local discovery.

OWNCLOUD_SQLITE_JOURNAL_MODE

depends on filesystem

Set a specific sqlite journal mode.

OWNCLOUD_SQLITE_LOCKING_MODE

EXCLUSIVE

Set a specific sqlite locking mode.

OWNCLOUD_SQLITE_TEMP_STORE

unset

Set the given temp_store on the sqlite database.

OWNCLOUD_DISABLE_CHECKSUM_COMPUTATIONS

unset

Set to disable all file checksum computations.

OWNCLOUD_DISABLE_CHECKSUM_UPLOAD

unset

Set to disable computing checksums for uploaded files.

OWNCLOUD_CONTENT_CHECKSUM_TYPE

SHA1

Select the file checksumming algorithm. "Adler32", "MD5", "SHA1", "SHA256", "SHA3-256" are valid, but not all have server support.

OWNCLOUD_UPLOAD_CONFLICT_FILES

unset

Set to "1" to enable uploading conflict files to the server.