Gozillion thanks, it's impossible to overestimate the luck of meeting real experts who can explain things in a simple language. God bless this forum :-)
May I ask couple more questions on this:
1.
Quote:
Originally Posted by
bakunin
If we talk about virtualisation we usually understand it the way it is done in i.e. Linux: you start with a (physical) machine, where you install some OS. In this OS you start some program, which emulates a some virtual hardware. On this hardware you install another OS and start an application on top of that.
Virtualization in p-Series systems is different from that concept, because the base OS (which would run on the physical machine above) and the emulation program are missing - their functions are done in the systems hardware directly.
Clear now. I can guess that productivity of p-Series-type virtualization is better, since there are less layers of software.
But what are the drawbacks of p-Series-type virtualization? What are there things that first type of virtualization can do, but p-Series type of virtualization cannot do?
2.
Quote:
Originally Posted by
bakunin
You may even - depending on some details in your environment i don't know - be able to "live-migrate" your LPARs from one system to another, which means as much as moving them from one big box to another big box without even shutting them down
Hmm... You're saying that I can (in principle) move my app (and its LPAR) from box to box easily. And can I (again, in principle) at all decouple my app and my boxes? I.e. have a bunch of IBM boxes and some "hyper-LPAR" that aggregates all of them into one big machine? And my app that runs on that "hyper-LPAR" and doesn't really care whether it in reality executed on box A, box B, or even both boxes A and B? Do people do that?
Thx again
---------- Post updated at 02:39 PM ---------- Previous update was at 02:38 PM ----------
Quote:
Originally Posted by
zxmaus
If you have 2 rootdisks and maybe a uat or test or dev system running your applications, do an alt_disk_install (clone the system), try to test-migrate on the existing hardware to 6.1 and see how your applications deal with this change. In our environment we have updated a huge amount of systems running all kinds of applications from AIX 5.2/5.3 to 6.1 and only one application had issues with 6.1 and required a reinstallation on the new platform to run properly.
AIX usually does a pretty good job in being downwards compatible so you might be lucky ...
Regards
zxmaus
Thanks, I'll check with IT team. That's a super hint!