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visigoth

A multipurpose load balancer with circuit breaker capabilities

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Visigoth

Visgoth is a multipurpose load balancer with circuit breaking capabilities. By default, it provides a round-robin strategy that will work in the majority of the situations.

Visigoth allows you to customize the strategy for choosing the healthiest target by evaluating the statistics recorded by previous calls to the same target:

function rater(upstream) {
    var responseTime = upstream.meta$.stats.responseTime;
    if(typeof responseTime !== 'undefined') {
        return 3000 - upstream.meta$.stats.responseTime;
    } else {
        return 1;
    }
}

var visigoth = require('../../visigoth')({customRater: rater});

visigoth.choose(function(target, errored, stats) {
    console.log(target);
    if (target === "slow-upstream") {
        stats.responseTime = 3001;
    } else {
        stats.responseTime = 100;
    }
    callback();
});

For more info on how to use it give a look to the folder examples that contains few use cases explained step by step.

The Team

Acknowledgements

This project was sponsored by nearForm

License

Licensed under MIT

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Package last updated on 19 Mar 2017

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