Publications de Nedeljko Vasic

Accelerating resource allocation in virtualized environments using workload classes and/or workload signatures

Ricardo Bianchini, Dejan Kostic, Nedeljko Vasic, Dejan Novakovic

Systems, methods, and apparatus for managing resources assigned to an application or service. A resource manager maintains a set of workload classes and classifies workloads using workload signatures. In specific embodiments, the resource manager minimizes ...

2013

Automatic Failure Recovery for Software-Defined Networks

Dejan Kostic, Nedeljko Vasic, Marco Canini, Maciej Leszek Kuzniar, Peter Peresini

2013

DeepDive: Transparently Identifying and Managing Performance Interference in Virtualized Environments

Ricardo Bianchini, Dejan Kostic, Nedeljko Vasic, Dejan Novakovic, Stanko Novakovic

2013

OF.CPP: Consistent Packet Processing for OpenFlow

Dejan Kostic, Nedeljko Vasic, Marco Canini, Maciej Leszek Kuzniar, Peter Peresini

This paper demonstrates a new class of bugs that is likely to occur in enterprise OpenFlow deployments. In particular, step-by-step, reactive establishment of paths can cause network-wide inconsistencies or performance- and space-related inefficiencies. Th ...

2013

DejaVu: Accelerating Resource Allocation in Virtualized Environments

Ricardo Bianchini, Dejan Kostic, Nedeljko Vasic, Dejan Novakovic

Effective resource management of virtualized environments is a challenging task. State-of-the-art management systems either rely on analytical models or evaluate resource allocations by running actual experiments. However, both approaches incur a significa ...

Acm Order Department, P O Box 64145, Baltimore, Md 21264 Usa2012

Energy-Proportional and Scalable Networks

Nedeljko Vasic

The power consumption of the Internet and datacenter networks is already significant due to a large degree of redundancy and high idle power consumption of the network elements. Therefore, dynamically matching network resources to the actual load is highly ...

EPFL2011

Identifying and Using Energy-Critical Paths

Dejan Kostic, Nedeljko Vasic, Dejan Novakovic, Marco Canini

2011

Bandwidth Adaptation in Streaming Overlays

Dejan Kostic, Simon Schubert, Nedeljko Vasic

A major challenge for real-time streaming overlays is to distribute high bit-rate streams with uninterrupted playback. Hosts usually have sufficient inbound bandwidth to support streaming, but due to the prevalence of asymmetric links in broadband networks ...

2010

Energy-Aware Traffic Engineering

Dejan Kostic, Nedeljko Vasic

Energy consumption of the Internet is already substantial and it is likely to increase as operators deploy faster equipment to handle popular bandwidth-intensive services, such as streaming and video-on-demand. Existing work on energy saving considers loca ...

2010

Simplifying Distributed System Development

Dejan Kostic, Viktor Kuncak, Maysam Yabandeh, Nedeljko Vasic

Distributed systems are difficult to design and develop. The difficulties arise both in basic safety correctness properties, and in achieving high performance. As a result of this complexity, the implementation of a distributed system often contains the ba ...

2009

Making Cluster Applications Energy-Aware

Vincent Salzgeber, Dejan Kostic, Nedeljko Vasic, Martin Barisits

Power consumption has become a critical issue in large scale clusters. Existing solutions for addressing the servers' energy consumption suggest ``shrinking'' the set of active machines, at least until the more power-proport-ional hardware devices become a ...

2009

Simplifying Distributed System Development

Dejan Kostic, Viktor Kuncak, Maysam Yabandeh, Nedeljko Vasic

2009

One Bit Is Enough: a Framework for Deploying Explicit Feedback Congestion Control Protocols

Dejan Kostic, Nedeljko Vasic

Since the bandwidth-delay products of Internet links keep increasing, issues with TCP's convergence time, throughput, and amount of queuing in these environments are becoming more pressing. As we move toward the next-generation Internet, it is important to ...

2009