On Wed, 15 Jan 2014 07:43:04 -0500, Peter Relson <[email protected]> wrote:
>Regarding frequent updates: > >I suppose I was wondering why you would be changing code in a production >library even as frequently as several times a day. I would have guessed >that your application would reach stability and not require updates aside >from functional enhancements (which most would not roll out several times >a day, I think) and bug fixes. > >And wouldn't most try out their code in a test environment and not choose >to inject potential instability several times a day, thus grouping their >updates to production? > >So I'm curious.... > >Updating data upon which the code operates is a different matter, but >that's perhaps not frequently within production code libraries. > >Peter Relson >z/OS Core Technology Design > Real world vs. IBM lab. :-) My larger clients have dozens if not hundreds of applications on z/OS. The schedules for updates / production moves are not the same for all application portfolios. Of course everything is tested and promoted via change control from dev / QA / prod etc. (as an example). Many of those applications have their own set of loadlibs, but some share common libraries. So when it comes to moving programs to production, that can happen multiple times in a day as the packages are created / executed for the production moves. The bigger shops seem to have more of a set schedule for doing things like this. Maybe on a specific night of the week like a Friday evening, or over a weekend. It has actually been the smaller shops (or business units within a shop) I have been at where the application teams seem to move things to production "whenever they are ready" without as strict of a schedule / day / time for application changes. Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:[email protected] Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://search390.techtarget.com/ateExperts/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
