diff --git a/lib/config.coffee b/lib/config.coffee
index f7a5be5..cddea7f 100644
--- a/lib/config.coffee
+++ b/lib/config.coffee
@@ -16,6 +16,7 @@
 ###
 
 exports.DATABASE_NAME = 'genieacs'
+exports.REDIS_DB = 0
 exports.ACS_PORT = 7547 # CWMP port as assigned by IANA
 exports.ACS_HTTPS_PORT = 7548
 exports.ACS_INTERFACE = '0.0.0.0'
diff --git a/lib/cwmp.coffee b/lib/cwmp.coffee
index df0dbac..de165c0 100644
--- a/lib/cwmp.coffee
+++ b/lib/cwmp.coffee
@@ -559,20 +559,24 @@ cluster = require 'cluster'
 numCPUs = require('os').cpus().length
 
 if cluster.isMaster
-  db.redisClient.flushdb()
-  cluster.on('listening', (worker, address) ->
-    util.log("Worker #{worker.process.pid} listening to #{address.address}:#{address.port}")
-  )
+  db.connect((err) ->
+    throw err if err
+    db.redisClient.flushdb()
+    db.disconnect()
+    cluster.on('listening', (worker, address) ->
+      util.log("Worker #{worker.process.pid} listening to #{address.address}:#{address.port}")
+    )
 
-  cluster.on('exit', (worker, code, signal) ->
-    util.log("Worker #{worker.process.pid} died (#{worker.process.exitCode})")
-    setTimeout(()->
+    cluster.on('exit', (worker, code, signal) ->
+      util.log("Worker #{worker.process.pid} died (#{worker.process.exitCode})")
+      setTimeout(()->
+        cluster.fork()
+      , config.WORKER_RESPAWN_TIME)
+    )
+
+    for [1 .. numCPUs]
       cluster.fork()
-    , config.WORKER_RESPAWN_TIME)
   )
-
-  for [1 .. numCPUs]
-    cluster.fork()
 else
   options = {
     key: fs.readFileSync('../config/httpscert.key'),
@@ -582,8 +586,8 @@ else
   httpServer = http.createServer(listener)
   httpsServer = https.createServer(options, listener)
 
-  # wait until DB connections are established
-  setTimeout(() ->
+  db.connect((err) ->
+    throw err if err
     httpServer.listen(config.ACS_PORT, config.ACS_INTERFACE)
     httpsServer.listen(config.ACS_HTTPS_PORT, config.ACS_HTTPS_INTERFACE)
-  , 1000)
+  )
diff --git a/lib/db.coffee b/lib/db.coffee
index 1b3d20a..c76835f 100644
--- a/lib/db.coffee
+++ b/lib/db.coffee
@@ -17,43 +17,71 @@
 
 config = require './config'
 mongodb = require 'mongodb'
-redisClient = require('redis').createClient(config.REDIS_SOCKET)
+redis = require('redis')
 parameters = require './parameters'
 
+redisClient = null
 tasksCollection = null
 devicesCollection = null
 presetsCollection = null
 objectsCollection = null
 
-mongodb.MongoClient.connect("mongodb://#{config.MONGODB_SOCKET}/#{config.DATABASE_NAME}", config.MONGODB_OPTIONS, (err, db) ->
-  exports.mongoDb = db
-  db.collection('tasks', (err, collection) ->
-    throw new Error(err) if err?
-    exports.tasksCollection = tasksCollection = collection
-    collection.ensureIndex({device: 1, timestamp: 1}, (err) ->
+
+connect = (callback) ->
+  callbackCounter = 6
+  mongodb.MongoClient.connect("mongodb://#{config.MONGODB_SOCKET}/#{config.DATABASE_NAME}", config.MONGODB_OPTIONS, (err, db) ->
+    return callback(err) if err
+    exports.mongoDb = db
+    db.collection('tasks', (err, collection) ->
+      exports.tasksCollection = tasksCollection = collection
+      collection?.ensureIndex({device: 1, timestamp: 1}, (err) ->
+      )
+
+      if --callbackCounter == 0 or err
+        callbackCounter = 0
+        return callback(err)
+    )
+
+    db.collection('devices', (err, collection) ->
+      exports.devicesCollection  = devicesCollection = collection
+      if --callbackCounter == 0 or err
+        callbackCounter = 0
+        return callback(err)
+    )
+
+    db.collection('presets', (err, collection) ->
+      exports.presetsCollection = presetsCollection = collection
+      if --callbackCounter == 0 or err
+        callbackCounter = 0
+        return callback(err)
+    )
+
+    db.collection('objects', (err, collection) ->
+      exports.objectsCollection = objectsCollection = collection
+      if --callbackCounter == 0 or err
+        callbackCounter = 0
+        return callback(err)
+    )
+
+    db.collection('fs.files', (err, collection) ->
+      exports.filesCollection = filesCollection = collection
+      if --callbackCounter == 0 or err
+        callbackCounter = 0
+        return callback(err)
+    )
+
+    exports.redisClient = redisClient = redis.createClient(config.REDIS_SOCKET)
+    redisClient.select(config.REDIS_DB, (err) ->
+      if --callbackCounter == 0 or err
+        callbackCounter = 0
+        return callback(err)
     )
   )
 
-  db.collection('devices', (err, collection) ->
-    throw new Error(err) if err?
-    exports.devicesCollection  = devicesCollection = collection
-  )
 
-  db.collection('presets', (err, collection) ->
-    throw new Error(err) if err?
-    exports.presetsCollection = presetsCollection = collection
-  )
-
-  db.collection('objects', (err, collection) ->
-    throw new Error(err) if err?
-    exports.objectsCollection = objectsCollection = collection
-  )
-
-  db.collection('fs.files', (err, collection) ->
-    throw new Error(err) if err?
-    exports.filesCollection = filesCollection = collection
-  )
-)
+disconnect = () ->
+  exports.mongoDb.close()
+  redisClient.quit()
 
 
 getTask = (taskId, callback) ->
@@ -166,7 +194,8 @@ getPresetsObjectsAliases = (callback) ->
   )
 
 
-exports.redisClient = redisClient
 exports.getTask = getTask
 exports.getPresetsObjectsAliases = getPresetsObjectsAliases
 exports.getAliases = getAliases
+exports.connect = connect
+exports.disconnect = disconnect
diff --git a/lib/fs.coffee b/lib/fs.coffee
index fba17fe..a377f51 100644
--- a/lib/fs.coffee
+++ b/lib/fs.coffee
@@ -28,10 +28,6 @@ mongodb = require 'mongodb'
 querystring = require 'querystring'
 
 db = null
-mongodb.MongoClient.connect("mongodb://#{config.MONGODB_SOCKET}/#{config.DATABASE_NAME}", config.MONGODB_OPTIONS, (err, _db) ->
-  db = _db
-)
-
 
 cluster = require 'cluster'
 numCPUs = require('os').cpus().length
@@ -70,4 +66,8 @@ else
       response.end('405 Method Not Allowed')
   )
 
-  server.listen config.FILES_PORT, config.FILES_INTERFACE
+  mongodb.MongoClient.connect("mongodb://#{config.MONGODB_SOCKET}/#{config.DATABASE_NAME}", config.MONGODB_OPTIONS, (err, _db) ->
+    throw err if err
+    db = _db
+    server.listen config.FILES_PORT, config.FILES_INTERFACE
+  )
diff --git a/lib/nbi.coffee b/lib/nbi.coffee
index 91451b8..3b897aa 100644
--- a/lib/nbi.coffee
+++ b/lib/nbi.coffee
@@ -398,4 +398,7 @@ else
         response.writeHead 404
         response.end('404 Not Found')
 
-  server.listen config.API_PORT, config.API_INTERFACE
+  db.connect((err) ->
+    throw err if err
+    server.listen config.API_PORT, config.API_INTERFACE
+  )