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1. De ce in cursul 11 (slide 43) VMWare este trecut la
"paravirtualizare"? <br>
<br>
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 :) ).<br>
<br>
Detalii:<br>
- <a class="moz-txt-link-freetext" href="http://www.vmware.com/pdf/VMware_VMI_performance.pdf">http://www.vmware.com/pdf/VMware_VMI_performance.pdf</a> <br>
[ 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." ]<br>
- <a class="moz-txt-link-freetext" href="http://wiki.openvz.org/Introduction_to_virtualization">http://wiki.openvz.org/Introduction_to_virtualization</a> <br>
[ Hardware emulation approach is used by <a
href="http://www.vmware.com/" class="external text"
title="http://www.vmware.com/" rel="nofollow">VMware</a> products, <a
href="http://fabrice.bellard.free.fr/qemu/" class="external text"
title="http://fabrice.bellard.free.fr/qemu/" rel="nofollow">QEMU</a>, <a
href="http://parallels.com/" class="external text"
title="http://parallels.com/" rel="nofollow">Parallels</a> and <a
href="http://www.microsoft.com/windowsserversystem/virtualserver/default.mspx"
class="external text"
title="http://www.microsoft.com/windowsserversystem/virtualserver/default.mspx"
rel="nofollow">Microsoft Virtual Server</a>. [...] The
paravirtualization approach is used by products such as <a
href="http://www.xensource.com/xen/" class="external text"
title="http://www.xensource.com/xen/" rel="nofollow">Xen</a> and <a
href="http://user-mode-linux.sourceforge.net/" class="external text"
title="http://user-mode-linux.sourceforge.net/" rel="nofollow">UML</a>.
]<br>
<br>
2. Slightly off-topic, dar daca tot vorbim de VMWare... Citind
despre el, am gasit un feature extrem de interesant:<br>
<br>
<a target="_blank"
href="http://blogs.vmware.com/sherrod/2007/04/the_amazing_vm_.html">http://blogs.vmware.com/sherrod/2007/04/the_amazing_vm_.html</a><br>
<br>
Think
„nenorocirea aia de bug din cod, care apare doar o dată la 30 de
rulări, și care mi-a mâncat ficații și nervii”. Și veți înțelege de ce
mi se pare așa de interesant feature-ul <img alt="smile"
src="cid:part1.05020500.02010503@catc.ro" height="15" width="15"><br>
<br>
<br>
<pre class="moz-signature" cols="72">--
Bogdan Sass
CCAI,CCSP,JNCIA-ER,CCIE #22221 (RS)
Information Systems Security Professional
"Curiosity was framed - ignorance killed the cat"</pre>
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