Friday, December 3, 2010

application virtualization concept - Qubes OS

Invisible Things Lab - they are focused on kernel security, virtualization security and system/firmware level security who brings up certain vulnerabilities in Intel process introducing qubes which is based on virtualization concept. core concept behind the OS is based on Security by Isolation .


Architecture mentioned in the above diagram(taken from the documentation).
I couldn't test / or willing to download ;) .
!!NOTE: You can only install Qubes on a 64-bit CPU! (most recent laptops have 64-bit CPUs)
!!!NOTE: Do not try to install Qubes in a VM, e.g. VMWare.



By the way if you want to try :
http://www.qubes-os.org/trac/wiki/InstallationGuide
http://qubes-os.org/Architecture.html
http://www.invisiblethingslab.com/itl/Welcome.html

IEEE P802.3az Energy Efficient Ethernet

Energy Efficient concept move from data centers to servers CPU and finally come up to the Ethernet controller level. I didn't want to read the IEEE standard ( i don't have capability to understand the content ). but in future drivers will interact to provide the dynamic negotiation of the bandwidth over the Ethernet, when the link idle it tries to save the power.
Relevant resources:
Overall intro :
http://www.nanog.org/meetings/nanog50/abstracts.php?pt=MTY0NCZuYW5vZzUw&nm=nanog50
IEEE working group:
http://www.ieee802.org/3/az/public/
One more tutorial :
http://www.ieee802.org/802_tutorials/07-July/IEEE-tutorial-energy-efficient-ethernet.pdf
Interesting concepts :
Desktop-to-switch links
– Are mostly idle
• Lots of very low bandwidth “chatter”
– High bandwidth needed for bursts
• Bursts are often seconds to hours apart
• Server links are also often not fully utilized
– Higher speed links offer more opportunity to save energy
– This is an area where more data is needed
• Evidence of low utilization (desktop users)
– LAN link utilization is generally in range 1 to 5% [1, 2]
– Utilization for “busiest” user in USF was 4% of 100 Mb/s

Asus's calming they are the first one :)