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Virtualization - Dan Shearer

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Information about Virtualization - Dan Shearer
Technology

Published on November 26, 2008

Author: arnav

Source: slideshare.net

Description

Dan Shearer's talk on Virtualization
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Virtualisation Dan Shearer [email_address]

Dan Shearer

[email_address]

With limited thanks to Arnav (who changed the subject at the last minute :-)

With limited thanks to Arnav

(who changed the subject at the last minute :-)

Virtualisation All about abstractions Nice terms exist for handwaving explanations Hopeless for describing specifics

All about abstractions

Nice terms exist for handwaving explanations

Hopeless for describing specifics

The Broad Approach Some classification: kinds of v12n Where's it all headed? Marketing furore but we're buying old tech

Some classification: kinds of v12n

Where's it all headed?

Marketing furore but we're buying old tech

It Isn't a Real Computer Can you kick it? Then it's Real. But... ”Real Computer” means ”imaginary” in C.S. :-(

Can you kick it?

Then it's Real. But...

”Real Computer” means ”imaginary” in C.S. :-(

Electronics More software involved in our real electronics All built on abstractions The only option is to include more software... ... even our hardware is substantially software

More software involved in our real electronics

All built on abstractions

The only option is to include more software...

... even our hardware is substantially software

Abstractions in v12n Electronics – can implement arbitary electronic devices in software Physical interfaces – can simulate most physical interfaces, including to things like radio Time – speed up, slow down, change direction People – simulate people doing things

Electronics – can implement arbitary electronic devices in software

Physical interfaces – can simulate most physical interfaces, including to things like radio

Time – speed up, slow down, change direction

People – simulate people doing things

Classic Uses 2004 case study

2004 case study

 

 

Just for fun

Testing The 'all software is crap' hypothesis Our only current hope is testing We're pretty bad at that too Abstracted electronics, networks, time and people help

The 'all software is crap' hypothesis

Our only current hope is testing

We're pretty bad at that too

Abstracted electronics, networks, time and people help

Physical Limits Create impossible hardware: speed, size Create impossible usage scenarios Create improbable timing events

Create impossible hardware: speed, size

Create impossible usage scenarios

Create improbable timing events

Time Limits My favourite bit You can do amazing things to virtual time Eg identical systems differing by 10 real secs. Eg restore to origin once every real minute Eg running time backwards

My favourite bit

You can do amazing things to virtual time

Eg identical systems differing by 10 real secs.

Eg restore to origin once every real minute

Eg running time backwards

Thanks! [email_address]

Thanks!

[email_address]

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