Dissertations / Theses on the topic 'Zabbix'

Detta examensarbete jämför två övervakningsverktyg för servrar i ett nätverk, Zabbix och op5 Monitor. Båda är open source och används aktivt av organisationer för att övervaka organisationsservrarnas processorlast, I/O-kö på hårddiskarna, status på tjänster och mycket mer. Dessa två övervakningsverktyg testas och jämförs med varandra ur perspektiven användarvänlighet, funktionalitet och prestanda. Resultaten visar att i de flesta fallen är Zabbix mer användarvänligt medan op5 Monitor i de flesta fallen har bättre funktionalitet. Det visar sig också att op5 Monitor har något högre prestanda än inte bara Zabbix utan även de övervakningssystem som testades av Robin Rudeklint år 2010.

This master's thesis focuses on optimizing the network tracking tool Zabbix. In the first part this thesis provides an overview of techniques used for monitoring computer networks. The thesis also describes the fundamentals of how Zabbix works, especially in large enviroments. In the second part of the thesis we compare existing optimizations of the database structure which divides large, parent tables into small partitions. The most suitable solution is chosen which is then modified for the BUT network needs. Using this optimization we achieved a decrease of the processor utilization on the Zabbix server and a significant decrease in the growth of data on its hard drive.

Ogni giorno vengono generati grandi moli di dati attraverso sorgenti diverse. Questi dati, chiamati Big Data, sono attualmente oggetto di forte interesse nel settore IT (Information Technology). I processi digitalizzati, le interazioni sui social media, i sensori ed i sistemi mobili, che utilizziamo quotidianamente, sono solo un piccolo sottoinsieme di tutte le fonti che contribuiscono alla produzione di questi dati. Per poter analizzare ed estrarre informazioni da questi grandi volumi di dati, tante sono le tecnologie che sono state sviluppate. Molte di queste sfruttano approcci distribuiti e paralleli. Una delle tecnologie che ha avuto maggior successo nel processamento dei Big Data, e Apache Hadoop. Il Cloud Computing, in particolare le soluzioni che seguono il modello IaaS (Infrastructure as a Service), forniscono un valido strumento all'approvvigionamento di risorse in maniera semplice e veloce. Per questo motivo, in questa proposta, viene utilizzato OpenStack come piattaforma IaaS. Grazie all'integrazione delle tecnologie OpenStack e Hadoop, attraverso Sahara, si riesce a sfruttare le potenzialita offerte da un ambiente cloud per migliorare le prestazioni dell'elaborazione distribuita e parallela. Lo scopo di questo lavoro e ottenere una miglior distribuzione delle risorse utilizzate nel sistema cloud con obiettivi di load balancing. Per raggiungere questi obiettivi, si sono rese necessarie modifiche sia al framework Hadoop che al progetto Sahara.

This diploma thesis deals with the monitoring of network elements of technological networks and distribution systems. There are described reasons why and what kind of values we want to monitor. Three monitoring systems are then selected, described their properties and functions. Based on their merits, one system for deploying the test environment is selected. The practical part is the configuration of the selected system and its subsequent deployment to the network.

La tesi tratta come concetto principale il monitoraggio. Vi è lo studio di due sistemi di monitoraggio: quello aziendale chiamato Skynet e uno di confronto chiamato Zabbix. Il progetto consiste nella realizzazione di un server Web che ha il compito di allineare dati monitorati con il SysAid CMDB. Il server Web crea dei CI all'interno del SysAid CMDB che contengono informazioni iniziali. Inoltre, sono stati realizzati servizi che possono essere divisi in due parti: quelli che vanno ad aggiungere dettagli alle informazioni iniziali scritte dal server Web nel SysAid CMDB e quelli a solo scopo di monitoraggio. Alla fine, l'intero progetto è stato integrato in Zabbix, in quanto all'inizio era predisposto per Skynet, per verificarne la solidità e la fattibilità di poter essere utilizzato anche con altri sistemi di monitoraggio.

The main goal of the master thesis is design and implementation of information system for monitoring purposes. The implemented monitoring system will be able to automatically monitor devices of a certain company. This goal is preceded by strategic analysis using PEST and 7S methods for examination of current state of the company. Another part is the analysis of the efficiency of service processes using the HOS method together with the selection of a suitable monitoring system. An enhancement of service processes is designed by the Lewin model. Finally, the selected information system for monitoring was designed, implemented and tested. A deployment of the system should provide simplification of devices supervision, to save costs as well as to speed-up the response-time to unexpected situations.

Master’s thesis discusses the design and implementation of network infrastructure for computer laboratory in Department of Communications. Thesis focuses on VLAN definitions and deployment of server virtualization, including network monitoring station.

À Zabbar, un village maltais du Nord-Est, la banda Maria Mater Gratiae et la banda San Mikiel, rivales depuis leur fondation, en 1883, sont intégrées dans la vie villageoise et animent la fête patronale de Santa Maria Mater Gratiae, tous les ans, le 8 septembre. La musique des bandas – des marches – est une musique populaire, festive, religieuse et écrite. Elle ne joue pas seulement un rôle décoratif ou d’utilité ni de stricte nécessité sociale, elle constitue un véritable fait social total. Elle s’inscrit dans une pratique collective du quotidien et produit des sociabilités multiples, des échanges, des univers sonores, un imaginaire musical riche en mouvement. La première partie de cette thèse, d’un caractère ethnographique, décrit le contexte musical du village, en mettant l’accent sur les bandas, leur siège – le kazin –, leur histoire, leur rôle dans le contexte musical maltais. Dans une deuxième partie, la musique des bandas se révèle être au centre d’échanges - des musiciens et des partitions – et de rivalités dans l’espace villageois et de l’île. Enfin, après une description de la musique dans la fête et une étude comparée qui montre l’origine même de ces formations dans la double histoire des orchestres de cuivre et d’harmonie, une dernière partie est consacrée à l’analyse musicale et a pour but de découvrir la logique de ces musiques paraliturgiques
In Zabbar, a village in north-east Malta, two bandas, Maria Mater Gratiae and San Mikiel, have been rivals since they were founded in 1883. They are part and parcel of village life and bring life to the Santa Maria Mater Gratiae village festival each year, on the 8th of September. The music of bandas, of marches, is a popular, festive, religious, written music. Its role is neither decorative nor utilitarian, nor is it a strict social necessity, it is an actual complete social fact. It is part of a collective pratice in daily life and produces multiple sociabilities, exchanges, musical worlds, an imaginary musical universe full of movement. The first part of this thesis, which is ethnographic, describes the musical context of the village, drawing attention to the bandas, their seats (or kazin), their history, the role they play in the Maltese musical context. In the second part, banda music is discovered to be central to exchanges (musicians and music scores) and rivalries within the village space and the island itself. Then comes a description of the music within the festival and a comparative study meant to show how the bandas found their origins in the history of brass bands and orchestras. Finally, a last part is dedicated to musical analysis and aims at discovering the logic within those paraliturgical musics

Les etudes que nous avons achevees dans cette these traitent des ecoles islamiques (colleges de droit et d'autres islamiques), fondees dans la ville de zabid a partir de 10e s. De notre ere jusqu'au 17e s. Elles sont au nombre de soixante-sept, dont vingt sont encore en activite. Cette etude est la premiere a border ce sujet. Cette these commence par une table des matieres ainsi qu'un avant propos. Elle est divisee en quatre chapitres. Le premier chapitre est precede par une introduction a l'histoire de la ville, en commencant par sa fondation au 9e s. Puis 13e s. Et 14e s. Lorsque la ville de zabid etait a l'epoque la capitale de l'etat rasulide, une des grandes puissances de l'orient, et enfin l'occupation ottomane au 16e s. Elle est suivie par un nombre des tableaux d'etats et des souverains qui ont gouverne le yemen a l'epoque. Chapitre 1 dans ce premier chapitre nous avons presente les premieres madrasas fondees au yemen ( leurs localisations, leurs fondateurs et leurs professeurs). Chapitre ii les madrasas encore existantes, comme nous l'avons signale au-dessus sont au nombre de vingt madrasas. Pour chacune d'elles, ont ete traites les points suivants: - sa localisation, l'histoire de sa fondation, description de son architecture, ses decors et ses inscriptions, ses restaurations et l'enseignement ( specialite, professeurs, assistants et etudiants).

The purpose of this study was to explore the factor difference between the Japanese version of Abbreviated Multidimensional Acculturation Scale (AMAS-ZABB-JP) (AMAS-ZABB: Zea et al., 2003) and the Multigroup Ethnic Identity Measure (MEIM-JP) (MEIM: Phinney, 1992), with Japanese sojourners and immigrants to the U.S. This is a pilot study to translate the scale into Japanese using methods recommended by Marìn and Marìn (1991). The participants for this study were 273 Japanese sojourners and immigrants to the U.S. The results indicated that the AMAS-ZABB-JP may have sufficient psychometrics regarding content, construct and concurrent validity and reliability. In order to increase its significance, further studies are necessary.

Abu Dhabi has experienced an unprecedented development during the last half century, growing rapidly from a remote desert settlement to a thriving metropolitan. Today, the Emirate ranks among the countries with the highest GDP per capita in the world, and this impressive development is anticipated to continue in the decades to come.

However, there are several challenges to the sustainability of the current economic prosperity, and the environmental degradation that was caused by the rapid development is an important factor in this context. Today, the United Arab Emirates as a country has the highest ecological footprint per capita in the world and Abu Dhabi, hosting the major part of the heavy industries and oil extraction capacity in the country, has an even larger footprint. Key drivers of this poor environmental track-record are the high greenhouse gas emissions and water consumption levels.

This deterioration of environmental conditions has growing implications for the economic welfare and physical well-being of the population. So far, the government's environmental policy is mostly symbolic, and concrete policy measures are largely lacking today. On the contrary, there are crucial elements in the governmental policy that have strong negative impacts on environmental conditions and thus on the sustainability of Abu Dhabi's growth, such as generous implicit subsidies on energy commodities and water and an ambitious strategy for economic growth, depending on a strong expansion of heavy industry.

This poses the question how environmental conditions will develop, when the population boom and economic expansion are anticipated to continue. However, the academic literature on environmental sustainability issues in Abu Dhabi as well as in the wider Gulf region is limited. Moreover, applied policy studies on the topic are absent as well.

This dissertation intends to contribute to the academic literature as well as to insights from existing policy studies, by projecting the impact of sustained economic growth on environmental conditions in Abu Dhabi. It compares a baseline scenario of economic growth with the four most relevant policy options aimed at footprint reductions available to policy makers in the Emirate: i) The introduction of a nuclear power plant; ii) An abandonment of utility price controls; iii) Shifts in the subsidization policy of water and energy markets; iv) Energy efficiency improvements in selected parts of the economy.

A recursively dynamic, multi-sectoral computable general equilibrium (CGE) model is used to generate the results in this dissertation, focusing on the two most important aspects of the ecological footprint in Abu Dhabi mentioned above. The CGE model is calibrated to a SAM for Abu Dhabi for 2009, and its specification is chosen to facilitate a focus on energy consumption and sustainability issues. Besides, it is extended by an environmental module and a fossil fuel module, and it incorporates several other modifications that are tailored to the Abu Dhabi economy.

Simulation results under a baseline scenario of economic growth show that carbon emissions will grow by 282% by 2030 compared to the base year 2009, and water consumption is anticipated to increase by 312%.

The introduction of nuclear plants, at the scale that is previewed today, will yield a reduction in emissions of 2.6% compared to the baseline scenario. The economic impact will be positive, with a 0.5% increase in GDP and small gains in employment levels.

Price liberalizations in the utility markets are a politically sensitive theme. When implemented, they can yield a 7.6% reduction in emissions and a 2.3% in water consumption by 2030 (vs. baseline). However, the economic cost involved amounts to 0.3% of GDP.

An abandonment of subsidies in the energy and water markets can lead to a 11.1% drop in carbon emissions, and a 28.8% decline in water consumption vs. baseline. The domestic economic impacts of this change are negative, but the GDP shows a modest 0.6% growth, due to improvements in the foreign trade balance.

Finally, efficiency improvements can lead to reductions in carbon emissions (13.8%) and water consumption (17.5%) compared to the baseline, and bring economic gains of 1.0% of GDP.

All four simulated policy scenarios in this dissertation bring about reductions in the ecological footprint, compared to the baseline as described above. Nonetheless, the consumption levels of energy and water as well as the related carbon emissions will be substantially higher in 2030 than they are today, under each of these scenarios. As a policy implication, the dissertation therefore finds that the previewed deterioration in environmental conditions requires active policy, if current welfare and prosperity are to be sustained. When assessed in the appropriate policy context, environmental conservation and improvements in the ecological footprint should be treated with a higher priority in the broad portfolio of development goals in Abu Dhabi.

Doctorat en Sciences économiques et de gestion
info:eu-repo/semantics/nonPublished

碩士
國立勤益科技大學
資訊工程系
104
As the rapid development of enterprises, more and more IT facilities are used for providing comprehensive information services. Network and host management have become an important issue for informational construction inside the enterprise. Therefore, it’s very important to maintain network working smoothly and supply services normally. Commonly equipped facilities include application servers, routers, switches and MIS (Management Information System), their operational status have to be monitored. Any abnormal operation has to be detected and solved to offer services. In this thesis, three kinds of monitoring software Cacti, Nagios, and Zabbix are introduced and investigated. The major functions of these software are introduced and compared. Meanwhile, the Zabbix is adopted and deployed in an enterprise environment, the provided Zabbix APIs are implemented to obtain monitoring data from IT facilities. The monitoring data are presented in a visualized information / graph, and integrated into an established web-view monitoring system. With the use of the monitoring system, the manager staff is able to grasp the status of information system or equipment quickly and thus enhance the management efficiency. Finally, the advantages of using Zabbix based monitoring system compared to other monitoring software are listed.

Network monitoring is a crucial IT process, which consists of monitoring network devices such as routers, switches, firewalls and servers for performance and fault issues. A good functioning network if vital for an organization, but unfortunately, network outages and performance issues are a part of every organization’s network. Faults, being hardware or human originated, may appear at any time and can give rise to sometimes critical situations. For this reason, network devices should be monitored continuously in a proactive way to prevent these network failures and downtimes. Identifying traffic bottlenecks, faulty components, low performance and other types of issues in an early stage minimizes or even eliminates bigger problems that can occur later on. Efficient proactive monitoring can help prevent network outage and should be implemented by every network administrator. Adopting a secure, low bandwidth consumption and compatible protocol is a good practice when implementing a monitoring solution. One such protocol is the Simple Network Management Protocol (SNMP) and provides a message format for communication between the SNMP managers and agents; it is also supported by most of the present day network devices and servers. The main goal of research described in this dissertation is the study of the various existing freeware SNMP monitoring platforms in the market today and the implementation of the one best suited for the university’s network. The solution would have to be compatible with the university’s multivendor device network and be scalable enough to permit future growth. It should also have a good alerting system to provide a pro-active approach to resolving issues. Implementation, evaluation and conclusions of the best suited monitoring solution are presented during the course of this study.

In my thesis Killed them all, of course: representation of the Robert Durst Case in documentary, movie and media I aimed to create a case study that follows the case of Robert Durst and its representation mainly in documentary series and lifemovie directed by Andrew Jarecki. It compares individual takes on the case and furthermore analyses the critics of decisions made by documentary makers based on the principles of documentary ethics. It focuses on moral dilemma that can documentary maker encounter. The thesis follows the investigation of the murders of Susan Berman, Morris Black, Durst's neighbor, and the disappearance of Kathleen Durst, whose body has never been found. Thesis also ponders over how effectively represent the truth in a documentary and what are the faults of Andrew Jarecki regarding his work both in documentary and in movie.