Depending on your configuration, some features can slow down the application if they are executed in the same process as the HTTP request. Kanboard can delegate these tasks to a background worker that listens for incoming events.

Examples of features that may slow down Kanboard:

• Sending emails via an external SMTP server can take several seconds.
• Sending notifications to external services.

This feature is optional and requires the installation of a queue daemon on your server.

Beanstalk

Beanstalk is a simple, fast work queue.

• Install Beanstalk using the package manager of your Linux distribution.
• Install the Kanboard plugin for Beanstalk.
• Start the worker with the Kanboard command-line tool: ./cli worker.

RabbitMQ

RabbitMQ is a robust messaging system suitable for high-availability infrastructure.

• Follow the official RabbitMQ documentation for installation and configuration.
• Install the Kanboard plugin for RabbitMQ.
• Start the worker with the Kanboard command-line tool: ./cli worker.

Notes

• Start the Kanboard worker with a process supervisor (e.g., systemd, upstart, or supervisord).
• Ensure the process has access to the data folder if you store files on the local filesystem or use SQLite.