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The backo2 npm package is a simple utility for managing exponential backoff with randomized jitter. It is useful for implementing retry mechanisms in applications where you need to handle transient errors gracefully by retrying operations with increasing delays.
Exponential Backoff
This feature allows you to implement exponential backoff for retrying operations. The `Backoff` class is instantiated with minimum and maximum delay values. The `duration` method calculates the next delay based on the backoff algorithm.
const Backoff = require('backo2');
const backoff = new Backoff({ min: 100, max: 10000 });
function retryOperation() {
const delay = backoff.duration();
console.log(`Retrying in ${delay}ms`);
setTimeout(() => {
// Your retry logic here
}, delay);
}
retryOperation();
Randomized Jitter
This feature adds randomized jitter to the backoff delay to prevent thundering herd problems. The `jitter` option specifies the amount of randomness to add to the delay.
const Backoff = require('backo2');
const backoff = new Backoff({ min: 100, max: 10000, jitter: 0.5 });
function retryOperation() {
const delay = backoff.duration();
console.log(`Retrying in ${delay}ms with jitter`);
setTimeout(() => {
// Your retry logic here
}, delay);
}
retryOperation();
The `retry` package provides a more comprehensive solution for retrying operations with configurable strategies, including exponential backoff. It offers more flexibility and options compared to backo2.
The `promise-retry` package is designed for retrying promise-based operations. It supports various retry strategies, including exponential backoff, and integrates well with modern JavaScript async/await syntax.
The `exponential-backoff` package is a lightweight utility for implementing exponential backoff with promises. It is similar to backo2 but focuses on promise-based workflows.
Simple exponential backoff because the others seem to have weird abstractions.
$ npm install backo
min
initial timeout in milliseconds [100]max
max timeout [10000]jitter
[0]factor
[2]var Backoff = require('backo');
var backoff = new Backoff({ min: 100, max: 20000 });
setTimeout(function(){
something.reconnect();
}, backoff.duration());
// later when something works
backoff.reset()
MIT
FAQs
simple backoff based on segmentio/backo
We found that backo2 demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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