hash-ring

Hash ring implemented in JavaScript. Inspired by http://www.tom-e-white.com//2007/11/consistent-hashing.html

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Install

npm install hash-ring

APIs

HashRing

Initialize hash ring instance.

• nodes {Array}: Nodes
• options {Object}: Config
  • hashMethod {String}: Specific hash method, crc32 or md5, default is crc32
  • replicas {Int}: Virtual nodes number,. default is 128

Usage

const HashRing = require('HashRing');
let ring = new HashRing([
    '1',
    '2'
], {
    hashMethod: 'crc32',
    replicas: 1
});

addNode

Add a node to hash ring, node should a string.

• node {String}: Node

Usage

const node = '3';
ring.addNode(node);

removeNode

Remove a node from hash ring, node should a string

• node {String}: Node

Usage

const node = '1';
ring.removeNode(node);

getNode

Get a node by specific key.

• key {String}: Query key

Usage

const key = '5';
console.log(ring.getNode(key));

Test

make test