wdavidw/node-hash-ring

A Consistent Hashing C++ add-on for node.js

node-hash-ring - Consistent Hashing C++ Add-on for node.js

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See this blog post for more information.

Installation

Via npm: npm install hash_ring Via git: git clone http://github.com/bnoguchi/node-hash-ring.git cd node-hash-ring/src node-waf configure build

Example

var HashRing = require("./lib/hash_ring");

// Create a cluster of 3 servers weighted so that 127.0.0.2:8080 stores twice as many 
// keys as 127.0.0.1:8080, and 127.0.0.3:8080 stores 4x as many keys as 127.0.0.1:8080
// and 2x as many keys as 127.0.0.2:8080
var ring = new HashRing({"127.0.0.1:8080": 1, "127.0.0.2:8080": 2, "127.0.0.3:8080":4});
console.log(ring.getNode("users:102") ); // Should be 127.0.0.3:8080

See ./test/test_distribution.js for another example: node test/test_distribution.js

Tests

To run the tests:

$ make test

License

MIT License

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Author

Brian Noguchi