Report from our JRA7/JRA8 Workshop USRR 2014 (April 03, 2014 in Ghent)
JRA7 and JRA8 have organized a workshop on understanding the interplay between sustainability, robustness and resilience (USRR 2014). It was held on April 03 2014 in Ghent in Belgium. There were 7 talks and about 20 People attended the workshop. A wide variety of topics were addressed. The keynote was given by Paolo Monti. It is important to avoid green at all cost solutions. Measures like sleep modes may interfere with resilience messures and may reduce time to failure and component lifetime. It is, thus, important to include cost of failures into sustainability considerations.
In the first presentation Dimitri Papadimitriou introduced the concept of natural sustainability and discussed predictability. Natural sustainability from ecology, which includes resilience aspects, operates differently from the current technical solutions. While current safe-to-fail solutions try to maintain a pre-planned steady-state with high performance at all cost (already a state of high energy), natural sustainability adapts to new safe states that maintain functionality. The latter can be compared to best effort forwarding of the Internet while the first may be compared to optimized networks with quality of service guarantees of Internet providers. Certainly, this comparison does not cover all aspects. This discussion was continued in the panel session. It seems that we tend to preserve systems of today while we are actually living in a rapidly changing world. Other interesting aspects from the discussions were discrete vs continuous world, origins of uncertainty and randomness, ....
Other talks made us aware of user requirements, about complexity, and about the problem that resilience measures may lead to unnormal behaviour in networks and data centers, which may cause security measures like intrusion detection systems to raise false alarms. Rebound effects of energy savings solutions need to be taken care of. Heuristics can be good enough for optimizing distributed event processing. Actually an interesting example for sustainability trade-offs as optimization consumes energy, simpler heuristics consume less, yet the consumption afterwards may be higher.
The workshop proceedings are available for download. Here is an overview of the workshop program:
14:00 – 15:40: USRR workshop session 1
Towards modelling unpredictable disturbance in networks – how interdisciplinary science
Dimitri Papadimitriou (Alcatel-Lucent Bell, Belgium), Bart Lannoo (iMinds – Ghent University,
Belgium) and Heiko Niedermayer (Technische Universität München, Germany)
Perspectives on Multicast Complexity
Nora Berg (HAW Hamburg, Germany), Sebastian Meiling (HAW Hamburg, Germany) and
Thomas Schmidt (HAW Hamburg, Germany)
Towards Cloud Resilience: The Challenges of Virtual Machine Migration
Noor-Ul-Hassan Shirazi (Lancaster University, UK), Steven Simpson (Lancaster University, UK)
and David Hutchison (Lancaster University, UK)
Press the Big Red Button: Understanding Users’ Security Concerns
Jerry Busby (Lancaster University, UK), Nicholas Race (Lancaster University, UK), Paul Smith
(Austrian Institute of Technology, Austria) and Mark Rouncefield (Lancaster University, UK)
16:10 – 17:25: USRR workshop session 2
Keynote: Green and survivable optical transport networks: a network performance
Paolo Monti (KTH, Sweden)
On the Interplay Between Sleep Modes and Device Lifetime in Telecommunication
Luca Chiaraviglio (University of Roma “Sapienza”, Italy) and Marco Listanti (University of
Roma “Sapienza”, Italy)
Investigation of contradicting optimization goals for event processing overlays in MANETs
Fabrice Bigirimana (University of Oslo, Norway), Thomas Plagemann (University of Oslo,
Norway) and Vera Hermine Goebel (University of Oslo, Norway)
17:25 – 18:20: Panel session & Conclusion of the workshop
To conclude, the USRR 2014 workshop at DRCN in Ghent raised interesting issues for the Internet Science community, not only for JRA7 and JRA8, but e.g. also for JRA1. We will continue the discussions in Bologna at the EINS workshop with plenary.