Post on 04-Dec-2014
description
Mark ( Chatchai )Wangwiwattana
Computer Science
Lyle School of EngineerSouthern Methodist University
Chrome OSThe Stateless Operating System
http://hothardware.com
Released 2007
The beginning of netbooks era
Asus EEEPC 700
Chrome devices blur the line between laptops and mobile devices
Acer C720 Chromebook
Stateless OS
1. If you throw a computer out the window, you should be able to recreate its software, configuration, and user data bit-for-bit identically on a new piece of hardware.
2. In any managed deployment from school workstation lab to enterprise server room, single computers should never be modified. Instead, all computers that need the modification should be modified in a single step.
The idea is proposed in 2004 by Red Hat.
http://citethisbook.net/Red_Hat_Introduction_to_Stateless_Linux.html
Chromium OS Overview
Simplicity Security
Speed
Chrome OS was Designed with These Three Principles
Simplicity
Chrome OS in 2009
Chrome OS in 2010
Chrome OS in 2014with Aura Windows Manager
● OpenGL/ES● XComposite extension● ICCCM( Inter-Client Communication
Conventions Manual)● EWHM( Extened Window Manager).
Speed
CPU & Memory Init
Hardware Init
Load & Start Bootloader
Load & Start Kernel
Splash Screen
Hardware Init
Splash Screen
Random Stuff
Login
Startup Application
Antivirus
Browser
Login
CPU & Memory Init
Hardware Init
Load & Start Bootloader
Load & Start Kernel
Splash Screen
Hardware Init
Splash Screen
Random Stuff
Login
Startup Application
Antivirus
Browser
Login
Traditional Desktop OS Chrome OS
Fast Boot
SpeedMemory Management
Swap
LinuxMain Memory Swap Partition
Swap
Chrome OSMain Memory Swap
Discard
Chrome OSMain Memory Swap
& Reload
Memory Management
10 MB
Softwall Hardwall
Discard
Chrome OSMain Memory Swap
& Reload
- Extend SSD Life- Fast
The Downside of This Technique
It’s hard to decide what tabs to be killed.
Ex. Music PlayerNote Taking App
Chrome OS
Tab Priority 1. Internal pages like new tab page, bookmarks, etc.
2. Tabs selected a long time ago3. Tabs selected recently4. Tabs playing audio5. Apps running in a window6. Pinned tabs7. The selected tab
Main Memory Swap
Compressed Memory Pull
ZSwap
ZSwap
Chrome OS
Security
● Verified Boot● Auto Update and System Partitions● Sandbox● Encrypted User Data● Read-only Root
SecurityVerified Boot
Malware
Traditional OSSystem Access
SecuritySandbox
Read Only
SecurityAuto Update & System Partitions
Root B
State PartitionStore User Data
*Root A
* Bootable Partition
Same SizeRead Only
Encrypted
Future of Chrome OS
Future of Chrome OS
Support Native Android App
http://www.omgchrome.com/android-apps-notifications-call-alerts-chromebook/
Future of Chrome OS
East Unlock
http://www.omgchrome.com/android-apps-notifications-call-alerts-chromebook/
Simplicity
Security
Speed
Summary of Chrome OSStateless LinuxNothing But Web
Discarding TabsFast Boot
Zswap
Auto-UpdateVerified Boot
SandboxEncrypted User’s DataRead-Only Root
Same Experience Everywhere
Chrome OS is a totally rethought computer that lets you stop worrying about your computer, so you can focus on the internet, which is what most of us use our computers for nowadays, anyways. -- Google
Questions