1. GREEN DATA CENTERS : LOAD BALANCING AND ENERGY MANAGEMENT OZLEM BILGIR

2. OUTLINE Part I : Load Balancing – Motivation – System Design – Optimization Problem – Results Part II : Energy Management – Energy Conscious Data Centers

3. WHY IS IT IMPORTANT?

4. SYSTEM DESIGN Internet

5. OPTIMIZATION PROBLEM

7. SYSTEM DESIGN Internet

8. WHAT DID WE USE IN SIMULATIONS? For Energy and Delay Models – Keep a Look-up Table For solving optimization – Simulated Annealing From Materials Science : When metal is cooled slowly, atoms move randomly, finally obtain minimal energy solution

9. t=0t=1 t=2t=3

10. t=0t=1 t=2t=3 WORSE!!

11. t=0t=1 t=2t=3 BETTER!!KEEP IT

12. TOTAL COST CHANGES Run # Cost

13. COMPARISION Cost Load

14. RESULTS

15. PART II : ENERGY-CONSCIOUS DATA CENTERS “Empty” servers  Low Power State – Automated : Sleep state – Manually

16. ENERGY-CONSCIOUS DATA CENTERS How about different types of requests? – Multi-Tier Servers – Probabilistic Analysis Web TierApplication TierData Tier

17. CONCLUSION Data centers at different locations can decrea se overall cost Load Balancing using SA gives good results Energy Models of Data Centers should be examined