distributedDelay.md

Distributed Delay

Delay responses given by Nocca.

This uses a normal distribution formula to randomize the exact delay used using a bell curve.

See the Normal Distribution wiki for more info.

Any time already consumed since beginning of the request will be subtracted from the delay. This includes any time taken for a proxy server to respond:
delay = calculatedDelay - (current timestamp - request start timestamp)

Usage

var noccaConfig = {

    responseDelay: ['distributedDelay', {
    
        // the targeted delay in milliseconds, before bell-curving
        expectation: 500,
        
        // optional, the minimal amount of delay, after bell-curving
        min: 400,
        
        // optional, the maximum amount of delay, after bell-curving
        max: 600,
        
        // the variance used to calculate the delay, determines the shape of the bell curve
        variance: 0.1
    }],
    
    
    // you can also specify this per endpoint
    endpoints: {
        someEndpoint: {
            responseDelay: ['distributedDelay', {
                expectation: 500,
                min: 400,
                max: 600,
                variance: 0.1
            }],
        },
        otherEndpoint: {
            // provide false as configuration to disable the delay
            responseDelay: ['distributedDelay', false]
        }
    }
}