# How to start the server

## Web service

You can start the default web server bundled in Tryton with this command line:

    trytond -c <config file>

The server will wait for client connections on the interface defined in the `web` section of the configuration.

Note

When using multiple config files the order is importart as last entered files will override the items of first files

### WSGI server

If you prefer to run Tryton inside your own WSGI server instead of the simple server of Werkzeug, you can use the application `trytond.application.app`. Following environment variables can be set:

> - `TRYTOND_CONFIG`: Point to configuration file.

> - `TRYTOND_LOGGING_CONFIG`: Point to logging file.

> - `TRYTOND_LOGGING_LEVEL`: An integer to set the default logging level (default: `ERROR`).

> - `TRYTOND_COROUTINE`: Use coroutine for concurrency.

> - `TRYTOND_DATABASE_NAMES`: A list of database names in CSV format, using python default dialect.

Warning

You must manage to serve the static files from the web root.

### Coroutine server

The Werkzeug server uses thread for concurrency. This is not optimal for the long-polling request on the bus as each client consumes permanently one thread. You can start the server with coroutine using the option `--coroutine`.

## Cron service

If you want to run some scheduled actions, you must also run the cron server with this command line:

    trytond-cron -c <config file> -d <database>

The server will wake up every minutes and preform the scheduled actions defined in the `database`. You can also launch the command every few minutes from a scheduler with the option `--once`.

## Worker service

If you want to use a pool of workers to run asynchronously some tasks, you must activate the worker in the `queue` section of the configuration and run the worker manager with this command line:

    trytond-worker -c <config file> -d <database>

The manager will dispatch tasks from the queue to a pool of worker processes.

## Services options

You will find more options for those services by using `--help` arguments.