example/index.js
function (callback) {
          async.parallel(
            [
              // fake db 1
              function (callback) { setTimeout(callback, 2000); },

              // fake db 2
              function (callback) { setTimeout(callback, 1000); }
            ],
            callback
          );
        }
function (callback) {
          async.parallel(
            [
              // fake db 1
              function (callback) { setTimeout(callback, 2000); },

              // fake db 2
              function (callback) { setTimeout(callback, 1000); }
            ],
            callback
          );
        }
function ( callback ) { async . parallel ( [ // fake db 1 function ( callback ) { setTimeout ( callback , 2000 ) ; } , // fake db 2 function ( callback ) { setTimeout ( callback , 1000 ) ; } ] , callback ) ; }
connect to remote services
connect to remote services