Adrián Pekár

Data preprocessing for efficient evaluation of network traffic parameters

This paper deals with recent results of a supporting mechanism for efficient evaluation of network traffic parameters. Most of the network monitoring tools store the measured data in a database for the later analysis. With the growth of the data in the database, processing of queries is becoming more and more time consuming. This fact results in an excessive response time of the database, which subsequently brings an adverse impact on the monitoring tool. While most of the monitoring tools make evaluations on the basis of outdated data from a database, the vast majority of them have to deal with this problem. In this contribution a new approach of efficient network traffic data evaluation through a database will be introduced, while the main attention will be dedicated to the implementation details.

SLAmeter - The evaluator of network traffic parameters

This paper introduces the SLAmeter network metering tool, which constitutes an alternative solution to the network traffic monitoring tools based on the IPFIX protocol. The main purpose of the SLAmeter is to offer a reliable possibility to track and fulfill the conditions specified in the Service Level Agreement subscribed between the subscriber and provider. SLAmeter was designed with the extension of the BasicMeter tool and consists of several components on different layers.

Overview and insight into the MONICA research group

This paper deals with the activities of the MONICA research group of the Computer Networks Laboratory at the Technical University of Košice in Slovakia. MONICA stands for the Monitoring and Optimization of Network Infrastructures, Communications and Applications. Our main areas of interest are related to development of the BasicMeter tool built in conformity with the IPFIX architecture. In this paper we give an overview of our solution and proposal of several enhancements over the scope of IPFIX, such as time synchronization for the One-Way Delay measurements, the protocol for direct communication with the analyzing application, the centralized management of the monitoring platform, and support for real-time monitoring.

Preparing databases for network traffic monitoring

This paper deals with the solution of database related problems which can occur during network traffic monitoring. During data evaluation through a database excessive response time can be noticed. While the time necessary to obtain the data from the database has a significant effect on the result of the monitoring, it is important to keep its value as low as possible. Practically, the vast majority of the monitoring tools have to deal with the problems related to the databases excessive response time, so their solution is really justified. In this paper an alternative method of network monitoring, the BasicMeter tool will be introduced by which the exact problems and their solution will be illustrated.

Web application of the SLAmeter tool

This paper provides an overview of recent development of a web application of the SLAmeter tool. The SLAmeter is a computer network traffic measuring and monitoring tool that provides various informations from collected data via its web application. Due to several performance and extensibility related problems with the former solution of the web application, the whole architecture of this top layer had to be redesigned. The main focus was therefore aimed at the new design and implementation of a thick client architecture. The achieved solution resulted in several advantages: (i) it helped to decrease the response time of the user interface, (ii) introduced new features, and (iii) enabled consistent development of new modules.

Reduction of IP flow information in network traffic monitoring systems

This paper deals with the design, implementation and evaluation of a method for the reduction of IP flow information. The aim of this method is to decrease the utilization of the measuring tools based on the IPFIX protocol. The designed method was implemented in the MyBeem component of the SLAmeter network traffic monitoring tool, which is used for measuring various network traffic characteristics. This method uses the values of the IP flow keys for decreasing the load of the monitoring system by reducing the number of flows sent from the Exporter(s) to the Collector(s). This technique focuses on aggregation by which the number of flows generated by the metering process is controlled. The main contribution of this paper is an IP flow information data reduction technique.

Recording distributed simulations using the HLA architecture

This paper deals with distributed simulations and the communication protocols used to reach interoperability between simulation applications. High-Level Architecture is one of the used protocols to interconnect different types of simulators. Application called RTI is responsible for manage communication between simulators. This paper describes how to connect distributed simulations using the HLA architecture and how to record data exchanged during the simulation.

Optimalizácia monitorovania sieťovej prevádzky

Tento prispevok sa zaobera otvorenými problemami vyskytujucimi sa pri pasivnom pristupe merania sieťových charakteristik. Opisuje najpouživanejsie pristupy merania sieťových parametrov ako aj charakteristiky, ktore sa pri monitorovani najcastejsie sleduju. Hlavným cieľom tohto prispevku je predstavenie konceptualneho navrhu riesenia opisaných problemov, ktorý by sa mal docieliť automatizovaným prisposobenim exportu zaznamov o tokoch prevadzky k aktualnemu stavu siete. Klicova slova: pasivne meranie, aktivne meranie, monitorovanie sieťovej prevadzky, tok, IPFIX DOI: https://doi.org/10.18267/j.aip.17