Green networking: lessons learned and challenges Prof. Raffaele Bolla CNIT/University of Genoa
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1 Telecommunication s and Telematics Lab Green networking: lessons learned and challenges Prof. Raffaele Bolla raffaele.bolla@unige.it CNIT/University of Genoa Department of Naval, Electrical, Electronics and Telecommunication Engineering (DITEN) University of Genoa Amsterdam, 22 October 2014
2 Summary Previous results: the FP7 experience Lessons learned Current challenges Conclusions
3 Recent (EU-FP7 projects) approaches in network energy-efficiency Power Management Energy Consumption Max Low Near to zero Standby Idle (for long periods) Energy profile Low Power Idle Idle state Idle (for short periods) Dynamic Adaptation Active state n Active state n-1 Smart Standby Low Load.... Active state 1 Fully Loaded
4 ECONET experience and results Demonstration Activities Home Cloud INFO IXIA inject ion 1 5 x 1 L- 20 See the online demo portal at LQDE1-5 5 x VDSL + 43 x VDSL loopbacks L19 3 x 1 L- 1 Monitoring and OAM Cloud ETY1 Access Cloud ETY2 Spire nt inject ion 4 1 x 1 L x 1 L- 2 L- 16 L- 24 TEIC Metro Cloud TEIA L- 17 MLX 4 x 1 L- 13 TEIB L x 1 L- 12 MLX Server Datacenter Cloud L- 7 L3 L21a IXIA inject ion 2 IXIA inject ion 3 L21b CNIT1 L-10 Emulation 2 emulation 1 CNIT2 9 x 1 L22 L- 6 L x 10 L-4 Core Cloud ALU1 ALU2 L- 5 Transport Cloud emulation 3
5 Demonstration Activities IXIA Home Cloud injectio n 2 LQDE1-5 Metro Cloud TEIA 5 x VDSL + 43 x VDSL loopbacks L19 ETY1 INFO 1 x 10 1 x 10 L21b L21a L-10 1 x 10 1 x 1 L- 7 L- 18 L- 6 4 x 1 L- 13 L- 5 8 x 1 L- 12 Emulation 2 emulation 1 ETY2 emulation 3 1 x 10 IXIA injectio n 1 1 x 10 Access Cloud L x 1 L3 L- 1 1x 10 CNIT2 L-4 Core Cloud TEIB 1 x 10 L- 16 Monitoring and OAM Cloud L x 10 L- 2 3 x 1 1 x 10 L x 1 Spirent injectio n 4 1 x 10 L- 24 Transport Cloud 1 x 10 TEIC 5 x 1 ALU1 CNIT11 x 10 MLX MLX Server 1 x 10 L- 23 Datacenter Cloud L22 IXIA injectio n 3 ALU2 ECONET experience and results
6 Energy Saving (%) Energy Saving (%) 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 49.1% 65.1% ECONET final results Impact results 79.2% Short-Term Impact 55.0% 46.3% 38.9% 53.6% 51.5% Transport Core Metro Datacenter Access Home Total 83.0% Long-Term Impact 73.4% 53.7% 69.3% 79.7% 77.6% Transport Core Metro Datacenter Access Home Total Short term Average energy reducoon of 51.6%. Saving of more than 190 Million Average per year energy of OPEX. reducoon Carbon footprint of 77.6%. Saving emissions of more than reducoon 290 Million per equivalent year of of OPEX. removing 50,000 Carbon cars per footprint year. emissions reducoon equivalent of removing 75,000 cars per year. Long term
7 Lessons Learned (1/3) Energy-aware hardware and autonomic low level power management mechanisms are mandatory, but definitely not sufficient. Heterogeneous power-saving mechanisms often interfere among each other, and cause heavy drawbacks: Energy savings are not additive by default Trade-off between energy consumption and network performance Power management needs to be driven by upper levels: to map their functional/logical resources and configurations with the underlying hardware to find the best energy-aware hardware configuration that optimizes the trade-off between network performance and device/network energy consumption Power management needs to be suitably orchestrated at different levels: Inside single devices At the device level (logical/physical planes) At the network level Moreover, a relevant push toward standards and regulatory actions is also essential (e.g., KPIs (Key Performance Indicators)).
8 Lessons Learned (2/3) The Green Abstraction Layer One of the main achievements of the ECONET project. The GAL is a hierarchical interface to control and to orchestrate power management primitives in a network device in a scalable and flexible way. The GAL layers allows to divide and conquer the complex process of optimizing the mapping between power management primitives (acting at the HW level) and the network logical/virtual/ functional configuration. The GAL has been approved in March 2014 as ETSI Standard Working Item: Reference operational model and interface for improving energy efficiency of ICT network devices
9 Future Internet/5G Challenges - Zero loss and very low latency services - Very broadband wireless/fixed accesses - Terabit transport networks Performance M2M Today Convergence SDN Clouds NFV OS Tomorrow Programmability/Virtualization s as multi-purpose service-aware infrastructures:
10 Future Internet/5G Challenges In order to support all these objectives, we need to deeply re-think and re-design network architectures, devices, and base technologies: In the small HW programmability inside networks and devices HW offloading for high performance Extreme virtualization paradigms to make different services sharing network resources Consolidation of services System level level Tomorrow, classical network protocols like IP will be considered simply as pla7orm- independent virtualized network services
11 The Future Internet/5G Challenges The Future Internet basics Technology Evolution Strong presence of programmable/general purpose HW inside networks and devices: it is the main element for introducing the flexibility necessary for Future Internet architectures development. Technological Impact Costs & greenhouse gas emissions: sustainability is a must for the Future Internet deployment. To introduce effective but sustainable technologies enabling network programmability and realizing the complete integration with information technologies is a cornerstone of the Future Internet architecture
12 The Future Internet/5G Challenges Programmability vs Energy Efficiency Fixed the silicon technology, energy consumption largely depends on the number of gates in the network device/ chip hardware. The number of gates is generally directly proportional to the flexibility and programmability levels of HW engines. If we fix a target number of gates by using General Purpose CPUs, we obtain: Maximum flexibility, Reduced performance (in the order of 100 Mbps/W) Very specialized ASICs, we obtain: Minimum flexibility Greatly enhanced performance (in the order of 1 Gbps/W) Other technologies (e.g., network/packet processors) provide performance between these boundaries Programmability currently is energy consuming!
13 The Future Internet/5G Challenges Programmability for Energy Efficiency Costs & greenhouse gas emissions OPEX & CAPEX E-sustainability Scalability Energy Efficiency Programmability /Virtualization - Terabit transport networks - Very broadband wireless/fixed accesses Performance - Zero loss and very low latency services s as multi-purpose service-aware infrastructures: - Internet of Services - Internet of Things - integrated Cloud Services (SDN) - -as-a-service (NFV)
14 An example: a new project in H2020 In- Programmability for nextgeneration personal cloud service support INPUT will enable cloud applications to go beyond classical service models (i.e., IaaS, PaaS, and SaaS) and to replace physical Smart Devices (SD) with their virtual images, providing them to users as a Service (SD as a Service SDaaS) The virtual image will allow to reduce the carbon footprint of appliances of 50% - 75%.
15 An example: SDN, NFV and distributed/ multi- core router architectures Openflow redirection, loadbalancing & network offload SW-based & General Purpose HW for value-added and heterogeneus network processing (Software Routers) Services (e.g., IP) Our vision To extend network devices and architectures to directly integrate multiple and heterogeneous applications, functions and services. Classical or innovative network services/ functions are just software objects dynamically allocated (e.g., by OpenFlow) to general purpose or specialized hardware resources. The modularity and flexibility of this approach, among others, open the possibility of driving software object allocation by means of very effective energy efficient polices. Services Acceleration Engines Distributed SW ROuter Project Openflow/ForCES signaling Traffic This is a «cloud» «multi-purpose» «energy-efficient» network prototype/ architecture - Allocation on general purpose elements - Dynamic offloading by means of accelerators - Dynamic redirections from accelerators General purpose Cores We control the interactions with OpenFlow in the Small Control Elements Given trade-off between energyconsumption and QoS per service
16 Conclusions The energy consumption in s (and more in general in ICT) is currently still a very relevant issue Trend based on both recent technologies and especially new innovation challenges (virtualization and performance) are moving the motivations from environmental impact and cost reduction to sustainability/scalability Smart power management should be able to give affordable solutions, but Energy efficiency should be a main target of the new technologies, not a simple constraint. The energy consumption management has to be natively integrated in network control and management systems like, e.g., performance and fault recovery. The integration process acting in and IT strongly suggests to manage this issue (or may be everything) with integrated approaches (within same unified tools ) Standard and regulatory actions are essential (including KPI)
17 Thanks for Your Kind Attention Any Questions?
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