Like most aspects of information technology, virtual computing had a relatively interesting history and it's kind of tended to waffle back and forth with technologies just like we've seen mainframes, client server systems, dumb terminal systems and so forth. So in this video, it'll be a short one and, and I don't want to spend too much time here but I do want to cover with you something kind of interesting here and that is the history of virtual computing. Now if I were to ask you when did virtual computing begin, I would venture to say that most people just like I would have, before I ever really got into this stuff and saw it. I would have told you virtual computing started, I don't know, the first time I ever saw it, kind of, very, very early 2000's when it was kind of a wow, gee whiz kind of thing. And this might shock you, we can trace virtual computing all the way back to the 1960's. Now I don't know what those guys at Bell Labs and those places were taking but whatever it was, it was working. So many things that are innovations that we're still using today, the groundwork was laid, the foundation was laid or they will discovered or even enhanced way back in the 1960's. And a lot of things came out of Bell Labs and Xerox Park and all those kinds of things. But anyway back in the 1960's, IBM had a good problem, they had some very powerful mainframes, they kind of owned the market, but they needed a way to logically partition these mainframe computers into kind of virtual separate machines. Because a mainframe was big, it was powerful, it was expensive and generally a lot of different people and processes tried to use these things at one time. And so they started to put their head to the problem and said now wait a minute, how we can logically partition our mainframe into what looks and feels like separate machines to the end users? Well they came up with a solution and it was virtual computing or, or virtual machines. However there is a twist here and this is an important twist. What they did is they went back to work on the actual CPU itself and they changed the instructions on the CPU to allow this to happen very easily. So a lot of the virtualization was kind of offloaded to the hardware itself. So as a result of that then through the 1980's and early 90's, if you remember that time if you were around, virtualization generally got abandoned as prices fell, as the low cost, you know, 286 386 486 servers and so forth. And then the, the, the 586 or you know, the Pentium 3's and 4's and all that kind of stuff came along. And so these low cost servers and desktops caused distributor computing to just explode. The Local Area Network, now instead of having one mainframe, you could put 50 or 100 servers in place, you could locate them out closer to the end user. You could design your networks with a whole lot more flexibility and everybody just thought this was great and everything was just humming a long just great. And then around about the mid 90's it began to dawn people, hey wait a minute, wait a minute, we keep adding server after server after server as new technologies and new ideas come along and they started to have a lot of operational challenges. The number of administrators, the number of information technology people on the payroll began to explode, that got expensive. The number of physical machines just kept growing and growing, that became a problem, keeping all those things updated, keeping them patched, keeping them safe, keeping them running, replacing parts, on and on and on. And just a general maintenance and backup and so by the mid 1990's, everybody clearly understood, we've got a problem here. There was very low infrastructure utilization, we had kind of a one to one at best, maybe a two to one relationship between our applications and our servers. Hardware costs were going through the roof, increase in management costs and high maintenance end user desktops, really started to put a squeeze on the budgets, the capabilities, organizational abilities of most IT departments. And so as a result in 1999, VMware introduced X86 System Virtualization. So they're talking about the, the, basically the Intel CPU functionality for a X86, 286, 386, 486, 586 and so on. Now when you read that statement, VMware introduced X86, it just sounds simple. Well they just kind of, you know, hired a programmer or two and they built this software. Well it was a whole lot more complex than that and I'm going to talk about specifically why and again it's kind of interesting, kind of trivia I guess but it's very interesting and you'll see it in a video in the course here called 17 Problems. But VMware really did a lot of really cool work and introduced true virtual computing onto the platforms we were using. Now keep in mind they did not have the advantage that IMB had in the 60's of being able to change the CPU structure and instruction set and so they had to do all this on a software base without working with the CPU. And hence, we get into the 17 problems but anyway, that's how virtual computing developed. It would be interesting if you like this kind of stuff, to go out and Google some of this and just read about how it worked out. But that's how we got virtual computing and I don't know about you, but it still kind of shocks me, depends on your age, I guess, but 1999 just doesn't seem that long ago to me. And I can still remember the first time I saw virtual computing and I realized, man this is going to change everything. Especially when they get these virtual machines running anywhere close as far as performance to the real bare metal machines and we're, we're there now. So anyway that's a little virtual history for you.
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