VMware & Virtual PC

[Horák Daniel]

> Taky by mne to zajimalo, sef chce nasadit virtualni servery 
> pro windowsi
> stroje aby se daly rychleji uvest do provozu po pruniku ci 
> horsim padu na
> hubu.
> 
> Veskery HW, ktery chcete pouzivat to vsak musi umet emulovat, 
> tedy i tu
> sitovku:
> 
> QEMU emulates the following PC peripherials: 
> VGA (hardware level, including all non standard modes) 
> PS/2 mouse and keyboard 
> IDE disk interface (port=0x1f0, irq=14) 
> NE2000 network adapter (port=0x300, irq=9) 
> Serial port (port=0x3f8, irq=4) 
> PIC (interrupt controler) 
> PIT (timers) 
> CMOS memory 
> 
> 
> QEMU also supports user mode Linux
> (http://user-mode-linux.sourceforge.net/) Copy On Write (COW) 
> disk images.
> The COW disk images are much smaller than normal images as 
> they store only
> modified sectors. They also permit the use of the same disk 
> image template
> for many users. 
> 
> Hmmm... tak ctu dal:
> Like bochs [3], QEMU emulates an x86 CPU. But QEMU is much faster than
> bochs as it uses dynamic compilation and because it uses the 
> host MMU to
> simulate the x86 MMU. The downside is that currently the 
> emulation is not
> as accurate as bochs (for example, you cannot currently run 
> Windows inside
> QEMU).

Ale taky tam je napsano, ze existuje i plna (korektni) SW emulace MMU,
ktera je asi 2x pomalejsi.

Spis bych videl jako problem, ze ta emulace neni tak korektni, aby
chodilo neco jineho nez Linux. Takze jedina realna moznost v soucasne
dobe je VMware.


			Dan