1. Energy Conservation in Content Distribution Networks
Saif ul Islam
IRIT, University of Toulouse, France

2. Energy Conservation Techniques Origin
Modeling
Energy Conservation Techniques
Origin
CDN server’s Utilization
Utilization-aware Energy Consumption Model
Switching-off/sleep Servers
Frequency Scaling?
CDN 1
CDN 2
CDN n
Closest Surrogate
Closest Origin Server
Random
Load-balance
Load-unbalance
Client Requests Redirection Policies
Response Time
Request Loss
Hit Ratio
Byte Hit Ratio
User Experience
User 1
User 2
User n

3. Some Results

4. Potential Issues
Frequency Scaling in CDN servers according to the load?
Any other energy conservation technique?
Does it matter to consider network energy cost or content transport energy cost in CDNs?
Other QoE metrics to consider?