level-rpc

This module is DEPRECATED. Just use multilevel, it's nearly as fast and supports binary data.

Super fast rpc mechanism for LevelUp

Usage

Fire up a server:

var net = require('net');
var Server = require('level-rpc').Server;

var server = new Server('/tmp/db');

net.createServer(function (con) {
  con.pipe(server.createStream()).pipe(con);
}).listen(8999);

And connect to it from a client:

var net = require('net');
var Client = require('level-rpc').Client;

var db = new Client();

var rpcStream = db.createRPCStream();
rpcStream.pipe(net.connect(8999)).pipe(rpcStream);

db.put('foo', 'bar', function (err) {
  if (err) throw err;
  
  db.get('foo', function (err, value) {
    if (err) throw err;
    console.log(value);
    // => bar
  })
});

Status

[X] stringify
[X] parse
[X] string encoding
[ ] buffer encoding
[X] rpc server
[X] rpc client
[ ] reconnection logic
[X] db#get(key, cb)
[X] db#put(key, value, cb)
[X] db#del(key, cb)
[ ] db#batch(opts, cb)
[ ] db#create*Stream()
[ ] db#approximateSize()

Motivation

multilevel is nice but slow and doesn't support binary data. Instead of going after feature parity first this module is all about speed and binary support, feature parity with levelup will come later.

Protocol

| METHOD | CB ID | FIELDCOUNT | F1LENGTH | F1 | ...

Examples

GET request:

| 1     | CB ID  | 1     | KEYLENGTH | KEY  |
| UINT8 | UINT32 | UINT8 | UINT8     | UTF8 |

GET response:

| 0     | CB ID  | 2     | ERRLENGTH | ERR  | VALUELENGTH | VALUE |
| UINT8 | UINT32 | UINT8 | UINT8     | UTF8 | UINT8       | UTF8  |

PUT request:

| 2     | CB ID  | 2     | KEYLENGTH | KEY  | VALUELENGTH | VALUE |
| UINT8 | UINT32 | UINT8 | UINT8     | UTF8 | UINT8       | UTF8  |

PUT response:

| 0     | CB ID  | 1     | ERRLENGTH | ERR  |
| UINT8 | UINT32 | UINT8 | UINT8     | UTF8 |

Benchmarks

 ∴  level-rpc (master) : node bench/
client-server-local.bench.js (1/5)
put 26502 ops/s
get 25773 ops/s

client-server-tcp.bench.js (2/5)
put 9268 ops/s
get 9497 ops/s

levelup.bench.js (3/5)
put 51282 ops/s
get 64516 ops/s

parse.bench.js (4/5)
get 1153846 ops/s
put 1153846 ops/s

stringify.bench.js (5/5)
get 681818 ops/s
put 566038 ops/s