Profit-driven resource provisioning in NFV-based environments

2018 4th IEEE Conference on Network Softwarization and Workshops (NetSoft)

2018

Self Cite

The concept of Network Function Virtualization (NFV) has been introduced as a new paradigm in the recent few years. NFV offers a number of benefits including significantly increased maintainability and reduced deployment overhead. Several works have been done to optimize deployment (also called embedding) of virtual network functions (VNFs). However, no work to date has looked into optimizing the selection of cloud instances for a given VNF and its specific requirements. In this paper, we evaluate the performance of VNFs when embedded on different Amazon EC2 cloud instances. Specifically, we evaluate three VNFs (firewall, IDS, and NAT) in terms of arrival packet rate, resources utilization, and packet loss.Our results indicate that performance varies across instance types, departing from the intuition of "you get what you pay for" with cloud instances. We also find out that CPU is the critical resource for the tested VNFs, although their peak packet processing capacities differ considerably from each other. Finally, based on the obtained results, we identify key research challenges related to VNF instance selection and service chain provisioning.

Section: Related Workmentioning

confidence: 99%

Price and Performance of Cloud-hosted Virtual Network Functions: Analysis and Future Challenges

Ghrada

Zhani

2018 4th IEEE Conference on Network Softwarization and Workshops (NetSoft)

2018

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“…These nodes have different hosting capacities ranging from 40 to 120 VNF instances. We considered 8 different embedding scenarios provided by an existing VNF placement algorithm proposed by Racheg et al [11] where the utilization of the infrastructure has been gradually increased. Figure 3 shows that we have low-utilization scenarios (i.e., S1-S4) where utilization is less than 50% and high-utilization scenarios (i.e., S5-S8) where utilization goes from 50% up to almost 80%.…”

Section: Simulation and Resultsmentioning

confidence: 99%

On Optimizing Backup Sharing Through Efficient VNF Migration

Aidi

Zhani

2019 IEEE Conference on Network Softwarization (NetSoft)

2019

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With the emergence of software defined networking and network function virtualization technologies, network services are expected to be offered as service function chains made out from virtual network functions that are connected to steer and process the incoming traffic. In this context, achieving the survivability of these chains against failures is a key challenge to ensure high availability and continuity of the services. A promising solution proposed in the literature is to provision backups for the virtual network functions that could be shared among multiple service chains. These backups are used in case of a failure to take over the failed functions and ensure service continuity. In this paper, we propose two solutions to efficiently place and provision the shared backups in order to ensure the survivability of the service chains against single node failures. The originality of these solutions is that they leverage the migration of virtual network functions to minimize the resources consumed by the backups. Simulation results show that, compared to existing solutions, the proposed schemes leveraging migration are able to reduce by up to 20% the amount of resources allocated for the shared backups while ensuring the survivability of the service chains .

“…The combination of SDN and NFV technologies makes it now possible to provision within very short timescales a fully-fledged network service chain. In this context, service chain provisioning and orchestration is one of the most challenging problem as it requires solving several optimisation problem simultaneously (e.g., [124]). Challenges include placing virtual machines, connecting them and steering the traffic through the ordered chain of the network functions.…”

Section: Ii3 Programmable Networkmentioning

confidence: 99%

Research challenges in nextgen service orchestration

Vaquero

Cuadrado

Future Generation Computer Systems

et al. 2019

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Fog/edge computing, function as a service, and programmable infrastructures, like software-defined networking or network function virtualisation, are becoming ubiquitously used in modern Information Technology infrastructures. These technologies change the characteristics and capabilities of the underlying computational substrate where services run (e.g. higher volatility, scarcer computational power, or programmability). As a consequence, the nature of the services that can be run on them changes too (smaller codebases, more fragmented state, etc.). These changes bring new requirements for service orchestrators, which need to evolve so as to support new scenarios where a close interaction between service and infrastructure becomes essential to deliver a seamless user experience. Here, we present the challenges brought forward by this new breed of technologies and where current orchestration techniques stand with regards to the new challenges. We also present a set of promising technologies that can help tame this brave new world.