diff --git a/sentinel/sentinel.go b/sentinel/sentinel.go
index 28a66f2..a4df9c3 100644
--- a/sentinel/sentinel.go
+++ b/sentinel/sentinel.go
@@ -14,60 +14,16 @@ import (
 	"qoobing.com/gomod/redis/logging"
 )
 
-// Sentinel provides a way to add high availability (HA) to Redis Pool using
-// preconfigured addresses of Sentinel servers and name of master which Sentinels
-// monitor. It works with Redis >= 2.8.12 (mostly because of ROLE command that
-// was introduced in that version, it's possible though to support old versions
-// using INFO command).
-//
-// Example of the simplest usage to contact master "mymaster":
-//
-//  func newSentinelPool() *redis.Pool {
-//  	sntnl := &sentinel.Sentinel{
-//  		Addrs:      []string{":26379", ":26380", ":26381"},
-//  		MasterName: "mymaster",
-//  		Dial: func(addr string) (redis.Conn, error) {
-//  			timeout := 500 * time.Millisecond
-//  			c, err := redis.DialTimeout("tcp", addr, timeout, timeout, timeout)
-//  			if err != nil {
-//  				return nil, err
-//  			}
-//  			return c, nil
-//  		},
-//  	}
-//  	return &redis.Pool{
-//  		MaxIdle:     3,
-//  		MaxActive:   64,
-//  		Wait:        true,
-//  		IdleTimeout: 240 * time.Second,
-//  		Dial: func() (redis.Conn, error) {
-//  			masterAddr, err := sntnl.MasterAddr()
-//  			if err != nil {
-//  				return nil, err
-//  			}
-//  			c, err := redis.Dial("tcp", masterAddr)
-//  			if err != nil {
-//  				return nil, err
-//  			}
-//  			if !sentinel.TestRole(c, "master") {
-//  				c.Close()
-//  				return nil, fmt.Errorf("%s is not redis master", masterAddr)
-//  			}
-//  			return c, nil
-//  		},
-//  	}
-//  }
-
 type Config struct {
 	Debug       bool   `toml:"debug"`      //调试开关（会在日志打印REDIS语句)
 	Username    string `toml:"username"`   //REDIS连接用户名
 	Password    string `toml:"password"`   //REDIS连接用户密码
 	MasterName  string `toml:"mastername"` //REDIS主名称（一个哨兵集群可管理多个REDIS主从结构）
 	Sentinels   string `toml:"sentinels"`  //哨兵节点列表，逗号分隔，一般配置三个
-	Wait        bool   `toml:"wait"`
-	MaxIdle     int    `toml:"max_idle"`
-	MaxActive   int    `toml:"max_active"`
-	IdleTimeout int    `toml:"idle_timeout"`
+	Wait        *bool  `toml:"wait"`
+	MaxIdle     *int   `toml:"max_idle"`
+	MaxActive   *int   `toml:"max_active"`
+	IdleTimeout *int   `toml:"idle_timeout"`
 }
 
 type Sentinel struct {
@@ -111,12 +67,37 @@ func NewPool(cfg Config) *redis.Pool {
 			},
 		}
 	)
+	if cfg.Wait == nil {
+		cfg.Wait = new(bool)
+		*cfg.Wait = true
+	}
+
+	if cfg.IdleTimeout == nil {
+		cfg.IdleTimeout = new(int)
+		*cfg.IdleTimeout = 300
+	} else if *cfg.IdleTimeout <= 0 {
+		*cfg.IdleTimeout = 86400 * 365 * 10
+	}
+
+	if cfg.MaxIdle == nil {
+		cfg.MaxIdle = new(int)
+		*cfg.MaxIdle = 100
+	} else if *cfg.MaxIdle < 0 {
+		*cfg.MaxIdle = 100
+	}
+
+	if cfg.MaxActive == nil {
+		cfg.MaxActive = new(int)
+		*cfg.MaxActive = 100
+	} else if *cfg.MaxActive < 0 {
+		*cfg.MaxActive = 100
+	}
 
 	return &redis.Pool{
-		MaxIdle:     cfg.MaxIdle,
-		MaxActive:   cfg.MaxActive,
-		Wait:        cfg.Wait,
-		IdleTimeout: time.Duration(cfg.IdleTimeout) * time.Second,
+		MaxIdle:     *cfg.MaxIdle,
+		MaxActive:   *cfg.MaxActive,
+		Wait:        *cfg.Wait,
+		IdleTimeout: time.Duration(*cfg.IdleTimeout) * time.Second,
 		Dial: func() (redis.Conn, error) {
 			masterAddr, err := sntnl.MasterAddr()
 			if err != nil {