Lyft open-sourced their rate-limiting component [12]. We will peek inside of the component and look at some examples of rate limiting rules:

domain: messaging

descriptors:

- key: message_type

value: marketing

rate_limit:

unit: day

requests_per_unit: 5

In the above example, the system is configured to allow a maximum of 5 marketing messages per day. Here is another example:

domain: auth

descriptors:

- key: auth_type

value: login

rate_limit:

unit: minute

requests_per_unit: 5

This rule shows that clients are not allowed to login more than 5 times in 1 minute. Rules are generally written in configuration files and saved on disk.