We haven't IPLd for a time change in 3 years. In fact, if it wasn't for a CP upgrade and the occasional power problem, we wouldn't re-IPL VM at all. If there is an app that doesn't like it, that gets recycled individually. We have a wide variety of z/OS, Linux and CMS based apps and only a couple of ancient ones have an issue (PROP gets cranky). Springing forward isn't too bad. Going back is harder, as they think they are repeating themselves.
Martha
