On 03/25/2016 06:02 AM, Carlos E. R. wrote:
Nah, I'll take a snapshot and wait a week thanks. Me too.
I have seen software updates rollback in very expensive unix systems (in the million dollar range). With software updates very thorughly tested, because they were fined if the update failed and caused even a minor downtime or some loss of functionality. Even so, they had rollbacks. And that started around 1990 or earlier.
Indeed. Rollback was there on mainframes - aka REAL COMPUTERS - a long, long time ago. When the Big Iron companies moved to their versions of UNIX their users, moving from room-filling mainframes to something that would fit in a closet and needed no raised floor and HVAC they expected the basic principles of operations and system management to continue, the same degree of reliability, even if it was implemented differently and the OS had a different name. So yes, those big, expensive UNIX systems were a Carlos said, and they did have rollback. I rather freaked out when I went to work as manager at a data centre for a high-street chain of stores; they didn't have a test replicated machine-database. Development was done on the live machine and live data. The VPIT was new and he too freaked when I pointed this out to him. (IT also covered the call centre and HR which weren't in my purview but were in his.) The developers were all using root login but n RCS system and every week a service tech came by with a CD of 'patches' that were applied. Actually no-one even knew he was doing that. I freaked when I found him at the console one day. No activity was being logged. Nothing was being documented. So many changes were implemented to bring operations into accord with good practices. It upset the developers, it upset the company with the service contract, but as this thread is making clear, it avoided issues of downtime, facilitated planning of hardware maintenance (such as microcode updates), disk balancing and preventive maintenance. We, the VPIT and myself, had to wave the CMM principles - out of chaos comes order - and show that this contributed to planning and budgeting. Yes, downtime would be a million dollar issue. -- A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting frowned upon? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org