Pietro Marchetta

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Cloud providers employ sophisticated virtualization techniques and strategies for sharing resources among a high number of largely uncoordinated and mutually untrusted customers. The shared networking environment, in particular, dictates the need for mechanisms to partition network resources among virtual machines. At the same time, the performance of(More)
The dependence of the industry on cloud-based infrastructures has grown much faster than our understanding of the performance limits and dynamics of these environments. An aspect only marginally analyzed in the past is related to the performance of the intra-cloud network connecting the virtual machines (VMs) deployed in the same data center. The few(More)
For a long time, traceroute measurements combined with alias resolution methods have been the sole way to collect Internet router level maps. Recently, a new approach has been introduced with the use of a multicast management tool, mrinfo, and a recursive probing scheme. In this paper, after analyzing advantages and drawbacks of probing approaches based on(More)
Traceroute is probably the most famous networking tool widely adopted in both industry and research. Despite its long life, however, measurements based on Traceroute are potentially inaccurate, misleading or incomplete due to several unresolved issues. In this paper, we face the limitation represented by hidden routers - devices that do not decrement the(More)
An accurate and exhaustive knowledge of the Internet topology is essential for a deep understanding of such a complex and ever-evolving ecosystem. In this context, a well-known key challenge is represented by alias resolution, i.e. the process of grouping under a unique identifier the addresses owned by the same network layer device. While several(More)
Researchers and operators often measure Round Trip Time when monitoring, troubleshooting, or otherwise assessing network paths. However, because it combines all hops traversed along both the forward and reverse path, it can be difficult to interpret or to attribute delay to particular path segments. In this work, we present an approach using a single packet(More)
In this work, we propose a methodology based on the alias resolution process to demonstrate that the IP level view of the route provided by traceroute may be a poor representation of the real router-level route followed by the traffic. More precisely, we show how the traceroute output can lead one to (i) inaccurately reconstruct the route by overestimating(More)
In this position paper we present S-MOVE (Smart and Social Move), a social innovation project funded by MIUR (Italian Ministry of Education, Research and University). SMOVE is based on a new conception of urban community, that allows citizens to share data and decisions in a smart and innovative way. In order to implement this new vision of urban mobility,(More)