Configuring the node

Each midas node provides a certain service.

The configuration of the MIDAS system is performed using text files in the INI-format. One INI-file can contain multiple sections, and the node is instructed to read one specific section at startup.

The options are given as key-value -pairs, e.g.

[section_name]
node_name = example_node
node_description = An example node
primary_sampling_rate = 500

The options in the INI-file relevant for a node are described below:

Option	Description	Example
node_name	The name of the node	example_node_A
node_type	The type of the node	test
node_id	The ID of the node	01
node_description	A short description of the node	An example node
primary_node	A boolean indicating if the node is a primary node.	True
port_frontend	Port used by the dispatcher to contact the node	5011
port_backend	Port used internally by the node for worker processes (responders).	5012
port_publisher	Port used by the node to publish messages	5013
run_publisher	Boolean indicating if the node runs a publisher	True
n_responders	Integer indicating how many responders the node runs simultaneously	3
primary_n_channels	Integer indicating the number of data channels present in the data stream received by the node	2
primary_channel_names	Channel names as strings	Ch1, Ch2
lsl_stream_name	Name of the LSL stream to connect to	MyStream
primary_sampling_rate	The sampling rate of the data stream	500
primary_buffer_size_s	Buffer size of primary data stream in seconds	10
primary_channel_descriptions	Channel names	First channel,Second channel
secondary_node	Boolean indicating if the node produces secondary data	False
secondary_n_channels	Number of secondary channels	2
secondary_buffer_size	Number of samples in the secondary data buffers	300
secondary_channel_names	Secondary channel names	S_Ch1, S_Ch2
secondary_channel_descriptions	Secondary channel descriptions	Secondary Channel 1,Secondary channel 2