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Enhancing Energy Efficiency with Wake-on-LAN Technology at Oxford's e-Research Centre

This document explores the implementation of Wake-on-LAN (WoL) technology to optimize energy usage by allowing remote access and management of computers. Key benefits include facilitating system updates, providing remote access for distributed computing projects, and serving as a reliable service provider. With a centralized approach, the WoL service integrates seamlessly with Security Single Sign-On, ensuring secure communications and scalability. This initiative at the Oxford e-Research Centre aims to improve monitoring and control, maximizing the use of existing infrastructure while addressing privacy concerns.

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Enhancing Energy Efficiency with Wake-on-LAN Technology at Oxford's e-Research Centre

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  1. Low Carbon ICT Services Kang Tang Kang.tang@oerc.ox.ac.uk Oxford e-Research Centre

  2. Why computers are left switched ON? • So they can be accessed remotely • For system update or backup • For use in distributed computing experiments(Campus Grid) • For use as service provider • Careless or bad memory

  3. Wake on LAN (WOL) • A technology that allow you to switch on a computer remotely • Originally from Intel & IBM in 1997 • Supported by most modern hardware • Magic Packet: 6 bytes of ones +16xMAC • WOL over internet • Simple but useful

  4. Institutional WOL service overview • Central server as single user front end • Gateway servers in local subnets • Identify node by physical address (MAC) • Integration with institutional SSO • Mandatory registration • Secured inter-server communication (HTTPS) • Integration with 3rd party services (WS) • Scalability and extensibility

  5. WOL Central Server Interface WS-SECURITY 3rd PARTY SERVICES SOAP MACHINE CENTRAL SERVER HUMAN HTTP REQ BROWSER KEBEROS

  6. WOL Gateway • Department only need to install gateway server • Required for each subnet • Broadcast magic packets locally • Secured communications with central server • Available as VMware appliance for both Linux and windows • Low hardware requirement

  7. WOL Service in Oxford OUCS Central WOL Server Gateway WebAuth SSO Registration Server Gateway Gateway Gateway HFS Service

  8. WOL user interface

  9. Monitoring Service • Motivation • Evaluate adoption of WoL • Better monitoring, better control • Make better use of existing infrastructure • Share exactly same gateway as WoL • Can be turned on easily on gateway • Integration with SSO • Attributes based authorization • Privacy concern

  10. Monitoring service at Oxford WebAuth SSO Monitoring Server Gateway Gateway Gateway Gateway Oak LDAP

  11. Real-time subnet status chart

  12. More Information http://www.oucs.ox.ac.uk/wol/ http://projects.oucs.ox.ac.uk/lowcarbonict/ Kang.tang@oerc.ox.ac.uk

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