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Big Data concerns processing of large volumes of digital data with high velocity and variety. Big Data technologies allow the analysis of data in real time, which is critical for various eScience applications. In order to meet the growing demand of Big Data applications, the infrastructures must be flexible enough to adapt to the characteristics of the applications. Most of the solutions presented...
Information Visualization (InfoVis) is a powerful tool to assist network administrators in daily tasks, and several authors report investigations about visualization techniques for network management. However, we have observed a fundamental issue that has not been addressed yet: how to promote the adoption of visualizations by network administrators, focusing on improving productivity and reducing...
IoT environments are typically composed of hundreds of geographically distributed sensors. Usually, these sensors are not physically protected from unauthorized access, which makes them vulnerable to exploitation where they can be manipulated to send incorrect data. The identification of such compromised sensors can be helpful in the process of exclusion or verification by administrators. To perform...
Cloud computing is a groundbreaking solution to acquire computational resources on demand. To deliver high quality cloud services and provide features such as reduced costs and availability to customers, a cloud, like any other computational system, needs to be properly managed in accordance with its characteristics (e.g., scalability, elasticity, timeliness). In this scenario, cloud monitoring is...
The Internet of Things (IoT) is part of the Future Internet. IoT comprises a huge amount of devices (hereinafter called as constrained devices) able to interact with the environment and to communicate over the Internet. Among other challenges that prevents the growth of IoT, the IoT is challenged for security issues. In this work, we are mainly interested in secure communication concerns for constrained...
Monitoring is an important issue in cloud environments because it assures that acquired cloud slices attend the user's expectations. However, these environments are multitenant and dynamic, requiring automation techniques to offload cloud administrators. In a previous work, we proposed FlexACMS: a framework to automate monitoring configuration related to cloud slices using multiple monitoring solutions...
RFC 5345 proposed by NMRG of the IRTF, outlines a consistent methodology for SNMP traffic measurements and analysis. However, it does not address how to visualize the SNMP traffic being observed, i.e., network operators are left with no proper resources to visually recognize behaviors and patterns on SNMP traffic traces. In this sense, Information Visualization concepts have been investigated, thus...
In a cloud computing environment, multiple resources need to be properly managed to improve resource utilization and offer predictable performance to customers. One essential management function that gains a special importance in the context of clouds is monitoring. Nowadays, cloud monitoring solutions need to meet several requirements such as Scalability, Accuracy, and Adaptability. In This paper,...
The monitoring of cloud computing environments is a key point to assure the availability of the cloud slices offered to cloud users. However, there are not any monitoring systems that satisfy all the cloud administrator requirements which imposes that cloud slices need to be monitored by a set of monitoring systems. The set of monitoring system configuration necessary to monitor a cloud slice and...
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