基于LevelDB的數據庫：multi-master-merge

一個支持多主復制和合并的數據庫，基于 leveldb, fwdb 和 scuttleup實現。

var mmm = require('multi-master-merge')
var level = require('level')

var mdb = mmm(level('data.db'), {encoding:'utf-8'})

mdb.put('hello', 'world', function(err, doc) {
  console.log('Inserted:', doc)
  mdb.get('hello', function(err, docs) {
    console.log('"hello" contains the following:', docs)
  })
})

復制

復制數據庫只需打開同步流和管道到另一個數據庫

// a and b are two database instances
var s1 = a.sync() // open a sync stream for db a
var s2 = b.sync() // open a sync stream for db b

s1.pipe(s2).pipe(s1) // pipe them together to start replicating

Updates will now be replicated between the two instances. If two databases inserts a document on the same key both of them will be present if you do a mdb.get(key)

a.put('hello', 'a')
b.put('hello', 'b')

setTimeout(function() {
  a.get('hello', function(err, docs) {
    console.log(docs) // will print [{peer:..., value:'a'}, {peer:..., value:'b'}]
  })
}, 1000) // wait a bit for the inserts to replicate

項目主頁：http://www.baiduhome.net/lib/view/home/1413507869809