1. GreenSleep - let’s make green computing possible April 14, 2011 FYP Briefing Presentation

2. Need to be green! Machines in LabMin. PowerMax. Power Dell PC in Lab54W115W Dell 22” Monitor31.4W35.6W iMac(not mentioned)241W Not to mention the file servers, UNIX workstations, etc…

3. Initial Thought #1 GreenServer Keepalive messages? Useful application data? Periodic signals with predictable pattern? Determine if a machine is suitable to be forced to sleep by looking at its outgoing traffic. Who monitor it? The client or the GreenServer? It is up to you!

4. Initial Thought #2 Determine if a machine is suitable to wake up by looking at the incoming traffic. Who monitor it? Of course, the GreenServer! How? Using the WoL (Wake-on-LAN). WOL GreenServer

5. Techniques? Traffic analysisForging Traffic Traffic Replay (after WoL) Sequence Number Synchronization

6. Deployment? NAT –based GreenServer Proxy –based GreenServer Gratuitous ARP

7. Project Goal My Expectation: not for satisfying any graduation requirement! –You will find it worth devoting your time and energy. Build and OWN a project that –You will be proud of! –Your supervisor will be proud of! –Your classmates will be proud of! –...... Work together with passion! –Yes! I’ll work with you!

8. Thank You! Any Questions?