Novasky : Cinematic-Quality VoD in a P2P Storage Cloud

1. Novasky: Cinematic-Quality VoD in a P2P Storage Cloud

2. Outline • Introduction • Design • Measurement and evaluation • conclusion

3. Introduction

4. Novasky

5. Introduction • Storage cloud • Peers are inter-connected over high-bandwidth network • storage space is reserved in each peer • pool storage spaces together • storage space can be accessed conveniently • design, implement, deploy, and measure a VoD system based on P2P storage cloud

6. Design

7. Objective and Challenge • Objectiv • Build a P2P storage cloud • Cinematic-quality • Challenges • Replacement • Demand and Supply • Solution • coding-aware peer storage and replacement strategy • adaptive server push strategy

8. Architectural Design Management center : 1)Maintain metadata 2)Authentication 3)Maintain current status of peers

9. Architectural Design Media servers: feed a rich repository of videos to a large number of users

10. Architectural Design P2P storage cloud: 1) pool local storage space together 2) organized into a mesh topology 3) exchange information periodically

11. Peer Storage and Replacement • Three aspects to consider • cache a number of videos • Uploading a certain part of video • Replication • Store a part of the video and promote diversity

12. 缓存饱和时 按最不常用顺序进行排序 生成编码的片断并保存 删除视频源文件

13. Reed-Solomon codes for segment

15. Measurement and Evaluation

17. Durable video availability

18. Durable video availability

19. Storage efficiency

20. Load balancing

21. Cost effectiveness of the server push-to-peer strategy

22. Cost effectiveness of the server push-to-peer strategy

23. Cost effectiveness of the server push-to-peer strategy

24. Transmission overhead

25. CPU and memory consumption

26. conclusion

27. conclusion • Design and implement Novasky • Propose two unique mechanism • Coding-aware peer storage and replacement strategy • Adaptive server push strategy • Offer insights which are helpful towards future designs of P2Pstorage cloud systems

28. Thanks