Is There Time to Live for Certaintyto Structure?

It goes back to the initial danof redis, as simple as possible. What does that mean? That mean it doesn't do any ifor you beside expe ex exploration. So what i pon is i put, if we go back to this example, wherehave to call the leater bas of web service. After one hour, if you try to get it, and owill you will not three tims the value, you will say, it's nill, or the key does not exist.