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#16
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Virtual machine -- how does it work
On Tue, 18 Jul 2017 20:08:53 +0100, "J. P. Gilliver (John)"
wrote: In message , Char Jackson writes: [] I'm not sure how that works, so I hope someone with experience of such things might tell me. Does it mean you have to boot twice, to run one OS on top of another? If so, what effect does it have on boot time? 1. You would boot the laptop as you always do. 2. You would launch the host, or hypervisor, program. 3. Within that program, you would boot the VM. So yes, there are two boots in that sequence. Once you've done the first boot, can a VM system be saved in current condition, rather like hybernating, or do you have to boot it every time you want to use it? [] I use VMware Workstation and it allows me to 'pause' and "resume" any of my VMs, with each of those operations taking about 3-5 seconds. The time probably depends on a few things, such as amount of allocated RAM. Mine are generally small, just big enough to meet a specific purpose, so about 2GB to 4GB of allocated memory for each. Of course, I can also shut them down and boot them up, but as expected that takes a lot longer. I only shut a VM down when I need to adjust one or more of its parameters, such as the amount of RAM allocated. I frequently go into a meeting in a conference room where I'll need to demonstrate something using 4 VMs, so I click 4 times to resume the 4 VMs, and in the time it takes me to reach over and grab the video cable that I'm going to be using, the 4 VMs are up and stable. At the end of the meeting, frequently the next group of people are piling into the room and there wouldn't be time for an orderly shutdown of 4 VMs, so the pause feature works really well. I click pause 4 times, and as I reach down to grab my laptop case, the VMs go to sleep and I can close the lid of my laptop. It's very fast and very slick. -- Char Jackson |
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#17
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Virtual machine -- how does it work
On 07/18/2017 09:02 AM, Brian Gregory wrote:
[snip] For 16 bit Windows programs a virtual machine running 32 bit Windows is the only way I know. Unless you have an actual older machine running older Windows (or, of course, DOS). I have such a machine. The CPU is a Pentium II class Celeron. The motherboard is marked "Y2K compliant" (once I never thought "Y2K compliant" would mean really old). -- Mark Lloyd http://notstupid.us/ "COFFEE.EXE Missing - Insert Cup and Press Any Key to continue." |
#18
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Virtual machine -- how does it work
On Tue, 18 Jul 2017 15:02:04 +0100, Brian Gregory
wrote: For DOS programs when using 64 bit Windows DOSBOX is likely to be the best solution. Exceptions are possibly a few DOS games that need a lot of CPU power. It's an emulation rather than a virtual machine. https://www.dosbox.com/ Yes, I use that for programs written in TurboPascal, which can't cope with high-speed processors. But it seems that getting a 32-bit version of Windows would be preferable for the other programs I use. -- Steve Hayes http://www.khanya.org.za/stevesig.htm http://khanya.wordpress.com |
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