1,641 research outputs found
Monitoring Large-Scale Cloud Systems with Layered Gossip Protocols
Monitoring is an essential aspect of maintaining and developing computer
systems that increases in difficulty proportional to the size of the system.
The need for robust monitoring tools has become more evident with the advent of
cloud computing. Infrastructure as a Service (IaaS) clouds allow end users to
deploy vast numbers of virtual machines as part of dynamic and transient
architectures. Current monitoring solutions, including many of those in the
open-source domain rely on outdated concepts including manual deployment and
configuration, centralised data collection and adapt poorly to membership
churn.
In this paper we propose the development of a cloud monitoring suite to
provide scalable and robust lookup, data collection and analysis services for
large-scale cloud systems. In lieu of centrally managed monitoring we propose a
multi-tier architecture using a layered gossip protocol to aggregate monitoring
information and facilitate lookup, information collection and the
identification of redundant capacity. This allows for a resource aware data
collection and storage architecture that operates over the system being
monitored. This in turn enables monitoring to be done in-situ without the need
for significant additional infrastructure to facilitate monitoring services. We
evaluate this approach against alternative monitoring paradigms and demonstrate
how our solution is well adapted to usage in a cloud-computing context.Comment: Extended Abstract for the ACM International Symposium on
High-Performance Parallel and Distributed Computing (HPDC 2013) Poster Trac
Modelling & Improving Flow Establishment in RSVP
RSVP has developed as a key component for the evolving Internet, and in particular for the Integrated Services Architecture. Therefore, RSVP performance is crucially important; yet this has been little studied up till now. In this paper, we target one of the most important aspects of RSVP: its ability to establish flows. We first identify the factors influencing the performance of the protocol by modelling the establishment mechanism. Then, we propose a Fast Establishment Mechanism (FEM) aimed at speeding up the set-up procedure in RSVP. We analyse FEM by means of simulation, and show that it offers improvements to the performance of RSVP over a range of likely circumstances
Linux XIA: an interoperable meta network architecture to crowdsource the future Internet
With the growing number of proposed clean-slate redesigns of the Internet, the need for a medium that enables all stakeholders to participate in the realization, evaluation, and selection of these designs is increasing. We believe that the missing catalyst is a meta network architecture that welcomes most, if not all, clean-state designs on a level playing field, lowers deployment barriers, and leaves the final evaluation to the broader community. This paper presents Linux XIA, a native implementation of XIA [12] in the Linux kernel, as a candidate. We first describe Linux XIA in terms of its architectural realizations and algorithmic contributions. We then demonstrate how to port several distinct and unrelated network architectures onto Linux XIA. Finally, we provide a hybrid evaluation of Linux XIA at three levels of abstraction in terms of its ability to: evolve and foster interoperation of new architectures, embed disparate architectures inside the implementation’s framework, and maintain a comparable forwarding performance to that of the legacy TCP/IP implementation. Given this evaluation, we substantiate a previously unsupported claim of XIA: that it readily supports and enables network evolution, collaboration, and interoperability—traits we view as central to the success of any future Internet architecture.This research was supported by the National Science Foundation under awards CNS-1040800, CNS-1345307 and CNS-1347525
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