WEBVTT 00:01.060 --> 00:06.100 Virtualization been around for over a decade now but it's only been in the last few years that we really 00:06.100 --> 00:10.080 began to see people using virtualization for all kinds of stuff. 00:10.480 --> 00:14.000 If you haven't seen virtualization yet well let me show you one right here. 00:15.420 --> 00:16.640 So if you take a look. 00:16.740 --> 00:20.280 I am running a copy of Windows Server 2012. 00:20.490 --> 00:21.870 Well actually that's not true. 00:21.870 --> 00:25.290 Let me show you what's really taking place here. 00:26.170 --> 00:28.830 Is I have a copy of Windows Server. 00:28.860 --> 00:33.670 It's big screen so it's hard to see the whole thing but you can see I'm really running Windows 8. 00:33.730 --> 00:39.820 And what's happening is I have a copy of Windows Server running underneath Windows 8. 00:39.820 --> 00:47.290 This is virtualization virtualization simply means to virtualize everything that there is about a computer 00:47.530 --> 00:49.150 into a virtual system. 00:49.150 --> 00:55.210 So when we virtualize a computer what we're doing is we're taking all of the hardware the CPQ the ram 00:55.240 --> 01:01.380 everything that is this computer and then virtualizing it within its own little system. 01:01.390 --> 01:06.220 Virtualization is important but it's a little bit confusing for people who haven't seen it the first 01:06.220 --> 01:07.070 time. 01:07.090 --> 01:12.580 The idea behind virtualization is that I'm going to have some kind of host system that has real hardware 01:13.060 --> 01:20.050 and I'm going to take that real hardware and I'm going to virtualize all that hardware so that another 01:20.050 --> 01:23.950 virtual system within the computer can actually take advantage of it. 01:23.950 --> 01:27.340 Virtualization is a lot different than what we call emulation. 01:27.340 --> 01:30.670 For example I love to play old Atari 2600 games. 01:30.670 --> 01:31.390 I'm sorry. 01:31.390 --> 01:37.870 I love these old crazy games and I could get emulators for the PC that will emulate an Atari 2600 but 01:37.870 --> 01:42.940 trust me there's nothing on my real high end laptop here that has any of the same hardware as that old 01:42.940 --> 01:44.640 Atari 2600 does. 01:44.770 --> 01:50.470 So the software pretends to be that hardware virtualization doesn't pretend to be anything that it's 01:50.470 --> 01:51.100 not. 01:51.280 --> 01:55.990 If you have a certain amount of RAM in this computer your virtual machine can only take that much RAM 01:56.290 --> 01:58.810 in whatever C-p you physically have in your computer. 01:58.810 --> 02:01.670 The virtual ICP has to be that type of CPQ. 02:01.720 --> 02:05.700 So that's a big difference between emulation versus virtualization. 02:05.820 --> 02:09.660 Now virtualization gives us some really big benefits. 02:09.670 --> 02:15.640 For example we have power saving one of the big problems we run into particularly with servers is that 02:15.880 --> 02:20.050 back in the old days you'd have to have individual machines that did all the different type of server 02:20.050 --> 02:27.400 jobs so if you add a domain controller and then you had a web server Those were always separate machines 02:27.610 --> 02:29.100 but they don't have to be anymore. 02:29.110 --> 02:30.420 I can take one machine. 02:30.420 --> 02:31.930 Now this is going to be a beefy machine. 02:31.930 --> 02:36.670 Don't get me wrong we have a lot of Ramadan's stuff and I can put multiple virtual machines on that 02:36.670 --> 02:37.460 one box. 02:37.480 --> 02:39.930 And that saves us lots and lots of power. 02:40.240 --> 02:43.180 It also gives us as part of that hardware consolidation. 02:43.180 --> 02:47.980 We simply don't have that many machines that we have to physically take care of if we can consolidate 02:47.980 --> 02:52.120 all these guys onto one or two or three or whatever it is number of boxes. 02:52.210 --> 02:59.610 We get the benefit of just not having to maintain and by and just fix so many individual computers. 02:59.620 --> 03:03.200 The other big thing is system recovery now with System Recovery. 03:03.280 --> 03:08.500 The cool part about virtualization is that when I'm running a virtual machine when I turn that virtual 03:08.500 --> 03:12.470 machine off it's simply saved as a file on my host computer. 03:12.490 --> 03:17.530 So let's say I'm running my computer along and I've got a web server that's in a virtualise machine 03:17.560 --> 03:18.700 and it gets hacked. 03:18.700 --> 03:23.420 Well it's really not that big of a deal with virtualization in a virtualise world. 03:23.420 --> 03:30.010 I just simply shut down that system take a backup copy of the file and fire that up and we're up and 03:30.010 --> 03:31.300 running again. 03:31.360 --> 03:34.920 So that also helps us in terms of duplication. 03:35.110 --> 03:38.280 If let's say you have four or five web servers I need to build. 03:38.400 --> 03:42.460 Well back in the old days that would be going through the installation process and setting up four or 03:42.450 --> 03:44.970 five physical boxes with virtualization. 03:44.980 --> 03:51.550 I could do one build which is simply a file and then drag that file over to other virtual machines and 03:51.550 --> 03:54.830 boot those up so I can just make copies of virtual machines. 03:54.850 --> 04:00.220 Now of course things like software licensing and stuff like that still comes into play but you do have 04:00.220 --> 04:01.680 that duplication option. 04:01.960 --> 04:06.560 And the last one and the reason I love virtualization more than anything else is research. 04:06.790 --> 04:10.960 You can only imagine how many times I get people give me a phone call saying Mike you know I'm running 04:10.980 --> 04:20.470 a Windows XP Service Pack for and you know back in the old days did we have a telnet in Windows enty 04:20.590 --> 04:23.800 version 3.5 when all these crazy questions I get. 04:23.980 --> 04:24.740 And back. 04:24.760 --> 04:29.470 Not that many years ago I used to keep all these computers around running all these different versions 04:29.470 --> 04:33.780 of operating systems just to be able to do R&D today. 04:33.820 --> 04:39.910 I've got one very very big box but it has a couple of hundred different setups for different operating 04:39.910 --> 04:40.890 systems in it. 04:40.990 --> 04:48.240 And if you need me to bring up a copy of this home without any service packs I can do it very very quickly. 04:48.240 --> 04:52.990 So from a research standpoint to be able to have a virtual machine that you could experiment and play 04:52.990 --> 04:55.430 with makes it absolutely fantastic. 04:55.440 --> 05:00.430 Anyway what I'm going to do now is I want to play with a couple of virtual machines to give you some 05:00.430 --> 05:03.380 ideas of some of the power of virtualization. 05:04.290 --> 05:07.920 So here is my windows 2012 virtual machine. 05:07.950 --> 05:09.690 Now this is just the console. 05:09.690 --> 05:12.760 This is just the connection to the virtual machine. 05:12.810 --> 05:16.860 We can actually just close this and the virtual machine will still be running up but I'll just close 05:16.860 --> 05:17.790 it like this. 05:17.790 --> 05:22.220 The real power to all this is what we call the hypervisor. 05:22.310 --> 05:28.710 Now the hypervisor is the thing that manages and runs the virtual machines for us. 05:28.710 --> 05:31.300 There are two kinds of hypervisor out here. 05:31.530 --> 05:34.410 This hypervisor in fact this is what's called Hyper-V. 05:34.410 --> 05:36.860 It comes with Windows. 05:36.900 --> 05:39.120 It's really very very powerful. 05:39.150 --> 05:43.510 And this particular tool runs on top of a host operating system. 05:43.510 --> 05:44.900 You see I'm running Windows 8. 05:45.090 --> 05:48.920 And so this hypervisor actually runs on top of it. 05:49.200 --> 05:51.980 Now there's another type of hypervisor. 05:52.140 --> 06:00.590 This type of hypervisor actually boots up a system so the type of hypervisor that boots up his system. 06:00.810 --> 06:03.440 You've seem a lot of times he leads a little pizza box systems. 06:03.440 --> 06:08.560 I have a little US be inside the computer just boots off a little thumb drive. 06:08.790 --> 06:09.790 And they look something. 06:09.810 --> 06:12.600 Well I've got a picture of one something like this. 06:13.880 --> 06:22.770 What you're looking at here is just a console screen from the anywhere's Yes X I hypervisor and you 06:22.790 --> 06:28.300 literally boot from this and it just comes up and this is just one of a few basic screens that you see. 06:28.430 --> 06:28.760 OK. 06:28.790 --> 06:30.110 Anyway back to me. 06:30.140 --> 06:37.770 So you've got two types of hyper visors so you've got hyper visors that run off a host operating system 06:37.920 --> 06:41.340 or you have hypervisor that actually boot computers up themselves. 06:41.340 --> 06:43.530 So you've got two different choices there. 06:43.590 --> 06:48.470 Now there's a lot more to virtualization but these are the basic pieces. 06:48.480 --> 06:51.720 Make sure you understand that there are two different types of hypervisor. 06:51.870 --> 06:55.480 And also make sure you understand the benefits of virtualization.