//从主 redis中获取连接,写只有这么快
 public IRedisClient GetClient()
          {
              lock (writeClients)
              {
                 AssertValidReadWritePool();
 
                 RedisClient inActiveClient;
                 while ((inActiveClient = GetInActiveWriteClient()) == null)
                 {
                     if (PoolTimeout.HasValue)
                     {
                         // wait for a connection, cry out if made to wait too long
                         if (!Monitor.Wait(writeClients, PoolTimeout.Value))
                             throw new TimeoutException(PoolTimeoutError);
                     }
                     else
                         Monitor.Wait(writeClients, RecheckPoolAfterMs);
                 }
 
                 WritePoolIndex++;
                 inActiveClient.Active = true;
 
                if (this.ConnectTimeout != null)
                 {
                     inActiveClient.ConnectTimeout = this.ConnectTimeout.Value;
                 }
 
                 if (this.SocketSendTimeout.HasValue)
                {
                     inActiveClient.SendTimeout = this.SocketSendTimeout.Value;
                }
                 if (this.SocketReceiveTimeout.HasValue)
                {
                     inActiveClient.ReceiveTimeout = this.SocketReceiveTimeout.Value;
                 }
                 if (this.IdleTimeOutSecs.HasValue)
                 {
                    inActiveClient.IdleTimeOutSecs = this.IdleTimeOutSecs.Value;
                 }
 
                inActiveClient.NamespacePrefix = NamespacePrefix;
 
                //Reset database to default if changed
                 if (inActiveClient.Db != Db)                 {
                     inActiveClient.ChangeDb(Db);
                 }
 
                 return inActiveClient;
             }
         }