[so] Virtualizare

[Bogdan Sass]

    1. De ce in cursul 11 (slide 43) VMWare este trecut la 
"paravirtualizare"?
   
    De acord, ultimele versiuni aduc acel VMI care ofera performante mai 
bune prin folosirea unui sistem de tip paravirtualization, dar in 
general VMWare (fie el WS sau ESX) face full virtualization prin binary 
translation (daca nu pentru alt motiv, macar pentru ca nu stiu ca 
nucleul windows sa suporte paravirtualizare :) ).

    Detalii:
    - http://www.vmware.com/pdf/VMware_VMI_performance.pdf
    [ referitor la VMWare Tools: "While such guest-host communication 
provides improved performance, and can be classified as 
paravirtualization, none of these examples involve changes to the 
underlying guest operating system kernel." ]
    - http://wiki.openvz.org/Introduction_to_virtualization
    [ Hardware emulation approach is used by VMware 
<http://www.vmware.com/> products, QEMU 
<http://fabrice.bellard.free.fr/qemu/>, Parallels 
<http://parallels.com/> and Microsoft Virtual Server 
<http://www.microsoft.com/windowsserversystem/virtualserver/default.mspx>. 
[...] The paravirtualization approach is used by products such as Xen 
<http://www.xensource.com/xen/> and UML 
<http://user-mode-linux.sourceforge.net/>. ]

    2. Slightly off-topic, dar daca tot vorbim de VMWare... Citind 
despre el, am gasit un feature extrem de interesant:

http://blogs.vmware.com/sherrod/2007/04/the_amazing_vm_.html

    Think "nenorocirea aia de bug din cod, care apare doar o data( la 30 
de rula(ri, s,i care mi-a mâncat ficat,ii s,i nervii". S,i vet,i 
înt,elege de ce mi se pare as,a de interesant feature-ul smile


-- 
Bogdan Sass
CCAI,CCSP,JNCIA-ER,CCIE #22221 (RS)
Information Systems Security Professional
"Curiosity was framed - ignorance killed the cat"

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