Marcus Brunner Bernhard, Rolf Stadler
networking has demonstrated strong potential for this new technology. From the service point of view, active networking allows customized packet processing inside the network on a per-packet,...
From Concept to Implementation – Peter Cabena, Pablo (2008)
Karim K. Hirji, Rolf Stadler, Jaap Verhees, Ro Zanasi
This paper is a review of the book Discovering Data Mining:
Abstract A Service Middleware that Scales in System Size and Applications (2008)
Constantin Adam, Rolf Stadler, Chunqiang Tang, Malgorzata Steinder, Michael Spreitzer
We present a peer-to-peer service management middleware that dynamically allocates system resources to a large set of applications. The system achieves scalability in number of nodes (1000s or more)...
Abstract A Service Middleware that Scales in System Size and Applications (2008)
Constantin Adam, Rolf Stadler, Chunqiang Tang, Malgorzata Steinder, Michael Spreitzer
We present a peer-to-peer service management middleware that dynamically allocates system resources to a large set of applications. The system achieves scalability in number of nodes (1000s or more)...
Examiner Prof, Rolf Stadler, Advisors Dr, Marcus Brunner, Dr. Stefan Schmid
I would like to thank my advisors Dr. Marcus Brunner and Dr. Stefan Schmid for their incessant guidance throughout the thesis work and their valuable comments on the thesis paper. I would also like...
Distributed Resource Allocation Strategies for Achieving Quality of Service (2008)
Björn Johansson, Constantin Adam, Mikael Johansson, Rolf Stadler
Abstract — We investigate the resource allocation problem for large-scale server clusters with quality-of-service objectives, where key functions are decentralized. Specifically, the optimal...
Submitted to IEEE electronic Transactions on Network and Service Management (eTNSM) (2008)
Koon-seng Lim, Constantin Adam, Student Members, Rolf Stadler
Abstract — We argue that effective management of future large and dynamic networks must be based on adaptive, decentralized control, in order to overcome the drawbacks of today’s management...
Threshold Crossing Alerts (2008)
Fetahi Wuhib, Mads Dam, Rolf Stadler, Er Clemm
Abstract. Threshold crossing alerts (TCAs) indicate to a management system that a management variable, associated with the state, performance or health of the network, has crossed a certain...
Design and Implementation of Performance Policies for SMS Systems (2008)
Alberto Gonzalez Prieto, Rolf Stadler
Abstract. We present a design for policy-based performance management of SMS Systems. The design takes as input the operator’s performance goals, which are expressed as policies that can be...
A Service Middleware that Scales (2008)
Constantin Adam, Erik Häggbrink, Rolf Stadler
We have implemented our middleware in Java, as an application filter in the Tomcat environment [1] (see Fig. 1). The filter instantiates when the Tomcat server starts the application(s) associated...
Monitoring Flow Aggregates with Controllable Accuracy (2008)
Alberto Gonzalez Prieto, Rolf Stadler
Abstract. In this paper, we show the feasibility of real-time flow monitoring with controllable accuracy in today’s IP networks. Our approach is based on Netflow and A-GAP. A-GAP is a protocol for...
Real-time Network Monitoring Supporting Percentile Error Objectives (2008)
Alberto Gonzalez Prieto, Rolf Stadler
Abstract. We report on the versatility of A-GAP for supporting different types of accuracy objectives. Previously, we considered accuracy objectives expressed in terms of the average error. In this...
Constantin Adam, Student Member, Rolf Stadler
Abstract — We present a decentralized design that dynamically allocates resources to multiple services inside a global server cluster. The design supports QoS objectives (maximum response time and...
An Architecture for Externally Controllable Virtual Networks and its Evaluation on NYNET (2007)
Mun Choon Chan, Aurel A. Lazar, Rolf Stadler
ion with Cell-Level QOS Guarantees 24 Review of VP Control Algorithms 29 Realization of the Control System 30 Evaluation of the Control System 41 The High Performance Platform for Experimentation 45...
A research agenda for distributed policy-based management (2007)
Mads Dam, Gunnar Karlsson, Babak Sadighi Firozabadi, Rolf Stadler
Policy-based management is based on defining a set of global rules, according to which a network or distributed system must operate. In the last few years, policy-based management has begun to emerge...
Supporting Service Creation and Isolation in High-performance Active Networks (2007)
Lukas Ruf, Lukas Ruf, Matthias Bossardt, Matthias Bossardt, Bernhard Plattner, Bernhard Plattner, ...
Abstract Active Networks provide mechanisms to dynamically inject program code into the network nodes. Our goal is to develop an architecture for service creation of active networks which exploits...
Supporting Service Creation and Isolation in High-performance Active Networks (2007)
Lukas Ruf, Lukas Ruf, Matthias Bossardt, Matthias Bossardt, Bernhard Plattner, Bernhard Plattner, ...
Abstract Active Networks provide mechanisms to dynamically inject program code into the network nodes. Our goal is to develop an architecture for service creation of active networks which exploits...
Virtualizing Active Networks for Telecom Environments (2007)
The paper addresses the question on how the benefits of active networking, such as customized packet processing inside the network and flexible service management, can be realized in a telecom...
Management in Telecom Environments that are based on Active Networks (2007)
The paper addresses the question how the benefits of active networking, such as customized packet processing in the data path and flexible service management, can be achieved in a telecom...
From Concept to Implementation-- Peter Cabena, Pablo (2007)
Karim K. Hirji, Rolf Stadler, Jaap Verhees, Ro Zanasi
This paper is a review of the book Discovering Data Mining:
A Linux-based Node OS for Network Processors (2007)
Lukas Ruf, Matthias Bossardt, Bernhard Plattner, Rolf Stadler
Abstract. Network processors are ideally suited as implementation platforms for active and programmable networks. Thus, an active network node OS needs to support network processors as well as...
Robust monitoring of network-wide aggregates through gossiping (2007)
Fetahi Wuhib, Mads Dam, Rolf Stadler
Abstract — We examine the use of gossip protocols for continuous monitoring of network-wide aggregates. Aggregates are computed from local management variables using functions such as AVERAGE, MIN,...
A-GAP: An Adaptive Protocol for Continuous Network Monitoring with Accuracy Objectives (2007)
Alberto Gonzalez Prieto, Rolf Stadler
We present A-GAP, a novel protocol for continuous monitoring of network state variables, which aims at achieving a given monitoring accuracy with minimal overhead. Network state variables are...
Robust monitoring of network-wide aggregates through gossiping (2007)
Fetahi Wuhib, Mads Dam, Rolf Stadler
Abstract — We examine the use of gossip protocols for continuous monitoring of network-wide aggregates. Aggregates are computed from local management variables using functions such as AVERAGE, MIN,...
M-GAP--A New Pattern for cfengine and other distributed software (2007)
Aggregation had been identified as an important component in the management of distributed systems, and as such, a number of distributed aggregation protocols are proposed by others[1][2][3] and also...
Adaptive Distributed Monitoring with Accuracy Objectives (2006)
Alberto Gonzalez Prieto, Rolf Stadler
We present A-GAP, a novel protocol for continuous monitoring of network state variables, which aims at achieving a given monitoring accuracy with minimal overhead. Network state variables are...
A Decentralized Application Placement Controller for Web Applications”, IBM (2006)
Constantin Adam, Giovanni Pacifici, Michael Spreitzer, Rolf Stadler, Chunqiang Tang
Abstract. This paper addresses the problem of dynamic system reconfiguration and resource sharing for a set of applications in large-scale services environments. It presents a decentralized...
Decentralized Service Level Monitoring using Network Threshold Crossing Alerts (2006)
Fetahi Wuhib, Rolf Stadler, Alexander Clemm
Service level agreements (SLAs) are at the core of the business relationship between service providers and their customers. Service level monitoring is necessary to validate and ensure that service...
Abstract — Threshold crossing alerts (TCAs) indicate to a management system that a management variable, associated with the state, performance or health of the network, has crossed a certain...
A Middleware for Self-Managing Large-Scale Systems (2006)
Constantin Adam, Student Member, Rolf Stadler
Abstract — Resource management poses particular challenges in large-scale systems, such as server clusters that simultaneously process requests from a large number of clients. A resource management...
Implementation and Evaluation of a Middleware for Self-Organizing Server Clusters (2006)
Prashant Varghese, Rolf Stadler
The nature of web service is becoming dynamic. Quality of service which until recently was limited to network layer is being extended to application layer. Varying loads at web sites make resource...
Distributed Real-time Monitoring with Accuracy Objectives”, KTH (2006)
Alberto Gonzalez Prieto, Rolf Stadler
Abstract. We introduce A-GAP, a protocol for continuous monitoring of network state variables with configurable accuracy. Network state variables are computed from device counters using aggregation...
Adaptive Distributed Monitoring with Accuracy Objectives (2006)
Alberto Gonzalez Prieto, Rolf Stadler
We present A-GAP, a novel protocol for continuous monitoring of network state variables, which aims at achieving a given monitoring accuracy with minimal overhead. Network state variables are...
Björn Johansson, Constantin Adam, Mikael Johansson, Rolf Stadler, Björn Johansson, Constantin Adam, ...
Abstract — We investigate the resource allocation problem for large-scale server clusters with quality-of-service objectives, in which key functions, including topology construction, request...
Distributed Real-time Monitoring with Accuracy Objectives”, KTH (2006)
Alberto Gonzalez Prieto, Rolf Stadler
Abstract. We introduce A-GAP, a protocol for continuous monitoring of network-wide state variables that achieves a given accuracy with minimal overhead. Network-wide state variables are computed from...
A generic protocol for network state aggregation (2005)
Aggregation functions, which compute global parameters, such as the sum, minimum or average of local device variables, are needed for many network monitoring and management tasks. As networks grow...
Decentralized computation of threshold crossing alerts (2005)
Fetahi Wuhib, Mads Dam, Rolf Stadler, Er Clemm
Abstract. Threshold crossing alerts (TCAs) indicate to a management system that a management variable, associated with the state, performance or health of the network, has crossed a certain...
Decentralized computation of threshold crossing alerts (2005)
Fetahi Wuhib, Mads Dam, Rolf Stadler, Er Clemm
Abstract. Threshold crossing alerts (TCAs) indicate to a management system that a management variable, associated with the state, performance or health of the network, has crossed a certain...
ARE LARGE-SCALE AUTONOMOUS NETWORKS UNMANAGEABLE? Motivation, Approach, and Research Agenda (2002)
Future large-scale networks need the capability of autonomous self- and re-configuration, because of their sheer size and the (probably) frequent changes in state and topology. Our interest is...
Service Management in Multi-Party Active Networks (2000)
Active networking is an expanding field of research. It includes the ability to easily install and modify customized network services and to process packets within the network in a customized way....
Virtual Active Networks - Safe and Flexible Environments for Customer-Managed Services (1999)
Abstract. Recent research has demonstrated the benefits of active networks: customized network services can easily be built and modified, packet streams can be processed inside the network, etc. This...
The Impact of Active Networking Technology on Service Management in a Telecom Environment (1999)
Active networking, where network nodes perform customized processing of packets, is a rapidly expanding field of research. This paper is based on the assumption that active networking technology will...
Virtual Active Networks - Safe and Flexible Environments for Customer-managed Services (1999)
. Recent research has demonstrated the benefits of active networks: customized network services can easily be built and modified, packet streams can be processed inside the network, etc. This paper...
Building Open Programmable Multimedia Networks (1998)
Andrew T. Campbell, Aurel A. Lazar, Henning Schulzrinne, Rolf Stadler
comet.columbia.edu Recent advances in distributed systems and transportable software and increasing demand for better quality-of-service (QOS) control in multiservice networks are driving a...
Building Open Programmable Multimedia Networks (1998)
Andrew T. Campbell, Aurel A. Lazar, Henning Schulzrinne, Rolf Stadler
was established in response to the need for a comprehensive understanding of the software architecture of the networks of the 90s and beyond. It is led by Professor Aurel A. Lazar and comprises more...
Building Open Programmable Multimedia Networks (1998)
Andrew T. Campbell, Aurel A. Lazar, Henning Schulzrinne, Rolf Stadler
Recent advances in distributed systems and transportable software and increasing demand for better quality-of-service (QOS) control in multiservice networks are driving a re-examination of network...
An Architecture for Performance Management of Multimedia Networks (1995)
Giovanni Pacifici, Giovanni Pacifici, Rolf Stadler, Rolf Stadler
A principal requirement for multimedia networks is the ability to allocate resources to network services with different quality--of--service demands. The objectives of achieving efficient resource...
Mun Choon Chan, Giovanni Pacifici, Rolf Stadler
In this paper, we present a novel approach to managing real--time traffic in multimedia networks. We first clarify the respective roles of the real--time control system, the management system, and...
Real-Time Emulation and Visualization of Large Multimedia Networks (1995)
Mun Choon Chan, Giovanni Pacifici, Rolf Stadler
ion Mechanism Network Abstracted Abstraction Control Parameter Emulation Monitoring Parameters Emulation Network Abstraction Network Emulation Control Parameters Emulation Monitoring Parameters...
A new paradigm for resource management in broadband networks (1994)
Giovanni Pacifici, Rolf Stadler
In this work, we propose a new paradigm to separate resource management, which determines a resource allocation policy, from connection management, which implements this policy. We describe the...
Integrating Resource Control and Performance Management in Multimedia Networks (1994)
Giovanni Pacifici And, Giovanni Pacifici, Rolf Stadler
A principal requirement for multimedia networks is the ability to allocate resources to network services with different quality--of-- service demands. The objectives of achieving efficient resource...
Integrating Resource Control and Performance Management in Multimedia Networks (1994)
Giovanni Pacifici, Rolf Stadler
A multimedia network is part of a multi--service environment, in which the task of allocating resources under quality--of--service constraints is crucial for service delivery. The high operational...
On Reducing the Complexity of Management and Control of Future Broadband Networks (1993)
In order to reduce the architectural complexity of broadband networks, the sharing of information among network management and control mechanisms is investigated. We introduce a concept for sharing...
Thesis (doctoral)--Universität Zürich, 1942.
Diss. Med. Univ. Zürich.