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.

The environment variables are:

  • OWNCLOUD_CHUNK_SIZE (default: 5242880; 5 MiB) – Specifies the chunk size of uploaded files in bytes. Increasing this value may help with synchronization problems in certain configurations.

  • OWNCLOUD_TIMEOUT (default: 300 s) – The timeout for network connections in seconds.

  • OWNCLOUD_CRITICAL_FREE_SPACE_BYTES (default: 512*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 (default: 1000*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 (default: 6) - Maximum number of parallel jobs.

  • OWNCLOUD_BLACKLIST_TIME_MIN (default: 25 s) - Minimum timeout for blacklisted files.

  • OWNCLOUD_BLACKLIST_TIME_MAX (default: 24*60*60 s; one day) - Maximum timeout for blacklisted files.