Performance-oriented Cloud Provisioning: Taxonomy and Survey

Cloud computing is being viewed as the technology of today and the future. Through this paradigm, the customers gain access to shared computing resources located in remote data centers that are hosted by cloud providers (CP). This technology allows for provisioning of various resources such as virtual machines (VM), physical machines, processors, memory, network, storage and software as per the needs of customers. Application providers (AP), who are customers of the CP, deploy applications on the cloud infrastructure and then these applications are used by the end-users. To meet the fluctuating application workload demands, dynamic provisioning is essential and this article provides a detailed literature survey of dynamic provisioning within cloud systems with focus on application performance. The well-known types of provisioning and the associated problems are clearly and pictorially explained and the provisioning terminology is clarified. A very detailed and general cloud provisioning classification is presented, which views provisioning from different perspectives, aiding in understanding the process inside-out. Cloud dynamic provisioning is explained by considering resources, stakeholders, techniques, technologies, algorithms, problems, goals and more.Comment: 14 pages, 3 figures, 3 table

Adaptive Mechanisms for Mobile Spatio-Temporal Applications

Mobile spatio-temporal applications play a key role in many mission critical fields, including Business Intelligence, Traffic Management and Disaster Management. They are characterized by high data volume, velocity and large and variable number of mobile users. The design and implementation of these applications should not only consider this variablility, but also support other quality requirements such as performance and cost. In this thesis we propose an architecture for mobile spatio-temporal applications, which enables multiple angles of adaptivity. We also introduce a two-level adaptation mechanism that ensures system performance while facilitating scalability and context-aware adaptivity. We validate the architecture and adaptation mechanisms by implementing a road quality assessment mobile application as a use case and by performing a series of experiments on cloud environment. We show that our proposed architecture can adapt at runtime and maintain service level objectives while offering cost-efficiency and robustness

Cloud computing resource scheduling and a survey of its evolutionary approaches

A disruptive technology fundamentally transforming the way that computing services are delivered, cloud computing offers information and communication technology users a new dimension of convenience of resources, as services via the Internet. Because cloud provides a finite pool of virtualized on-demand resources, optimally scheduling them has become an essential and rewarding topic, where a trend of using Evolutionary Computation (EC) algorithms is emerging rapidly. Through analyzing the cloud computing architecture, this survey first presents taxonomy at two levels of scheduling cloud resources. It then paints a landscape of the scheduling problem and solutions. According to the taxonomy, a comprehensive survey of state-of-the-art approaches is presented systematically. Looking forward, challenges and potential future research directions are investigated and invited, including real-time scheduling, adaptive dynamic scheduling, large-scale scheduling, multiobjective scheduling, and distributed and parallel scheduling. At the dawn of Industry 4.0, cloud computing scheduling for cyber-physical integration with the presence of big data is also discussed. Research in this area is only in its infancy, but with the rapid fusion of information and data technology, more exciting and agenda-setting topics are likely to emerge on the horizon

Menilai kualiti perkhidmatan pihak berkuasa tempatan menggunakan instrumen FM-SERVQUAL

Isu kecekapan sistem penyampaian perkliidmatan Pihak Berkuasa Tempatan (PBT) menjadi perhatian utama kerajaan. Ia meliputi Pengurusan Fasiliti ke atas modal insan, premis, tekiiologi dan proses kerja di PBT. Fungsi Pihak Berkuasa Tempatan semakin mencabar selari dengan perubahan persekitaran yang begitu pantas. Ini menimbulkan keperluan Pihak Berkuasa Tempatan menyediakan perkliidmatan lebih berkualiti. Kualiti Perkliidmatan adalah suatu konsep yang abstrak dan elusif dengan cirinya 'tidak ketara,' heterogeneous dan 'tidak boleh dipisalikan' antara proses dan output. Ciri-ciri ini menjadikan Kualiti Perkliidmatan sukar diukur dan sukar dinilai. Beberapa model dikenal pasti telah dibangunkan bagi menilai Kualiti Perkliidmatan. Bagaimanapun model-model berkenaan hanya berasaskan prestasi perkliidmatan semasa dan tidak mengambilkira ekspektasi pelanggan yang merupakan kriteria penting dalam penilaian Kualiti Perkliidmatan. Dengan demikian penyelidikan ini berusaha meneliti perkara ini dengan membangunkan instrumen yang dinamakan FM-SERVQUAL. Instrumen ini dibangunkan dalam kerangka Pengurusan Fasiliti Bersepadu. Ia berasaskan persepsi dan ekspektasi pelanggan iaitu SQ = P|E, di mana; SQ adalah Kualiti Perkliidmatan; P adalah Persepsi dan E adalah Ekspektasi. Instrumen ini berupaya mengenal pasti simptom ketidakpuasan pelanggan dalam sistem penyampaian perkliidmatan PBT. Sehubungan itu Majlis Bandaraya Johor Bahru telah dipilih sebagai kajian kes. Ia melibatkan dua fasa kutipan data primer. Fasa pertama dilaksana berasaskan pendekatan kualitatif menerusi temu bual separa berstruktur ke atas penyedia perkliidmatan iaitu 20 orang pegawai kanan MBJB. Hasil kajian menunjukkan wujudnya keperluan untuk mengukur tahap Kualiti Perkliidmatan sistem penyampaian di PBT. Berikutnya, dalam Fasa kedua. pengukuran ke atas Kualiti Perkliidmatan dilaksana berasaskan pendekatan kuantitatif. Ia melibatkan dua tahap kutipan data primer ke atas penyedia perkliidmatan. Hasil analisis mendapati lima (5) elemen dalam komponen pengurusan teknologi dan ICT dan enam (6) elemen dalam komponen pengurusan premis berada di bawah tahap Perkliidmatan Berkualiti. Lain�lain elemen perkliidmatan mencapai tahap kualiti minimum. Instrumen FM�SERVQUAL yang dibina secara empirikal berupaya menilai Kualiti Perkliidmatan dalam persekitaran PBT yang begitu kompleks. Ia juga berfungsi sebagai alat penting dalam perancangan polisi organisasi pada masa hadapan

Acceptance of WoredaNet E-Government Services in Ethiopia: Applying the UTAUT Model

WoredaNet is a Wide Area Network intended to link all woreda1 administrative units in Ethiopia. The technology presentsunique opportunities to facilitate the application of e-Government packages in the country. This study is a work in progressthat utilizes the Unified Theory of Acceptance and Use of Technology (UTAUT) for the understanding of acceptance andadoption of Information Technology in Ethiopian context. The study tries to further validate the model and assess acceptanceof the e-Government services put in place in the WoredaNet infrastructure in the country. The government of Ethiopia, whileutilizing the technology, is still in the process of extending it throughout the country. The study, thus, contributes to thesuccess of Services implementation in the WoredaNet by examining acceptance and utilization issues amongst the users sinceusers’ acceptance of the technology is crucial for its ultimate success

Management model for measurement infrastructure

The evaluation of metric of performance is useful in the evaluation of protocols, in the improvement of applications, in the content choice, among others. The obtaining of these metrics, it continues being a complex task because most of the time there are not appropriate tools for such. The measurement infrastructures appear as a form of endowing the networks of computers with instruments that facilitate the acquisition of these metrics. This work evaluates a group of measurement infrastructures, where it is possible to observe that the treatment showed to the management of such infrastructures is varied. They do not possess a group of standardized management functions. Based on that, this article presents a proposal of a management model for measurement infrastructures. The proposed model maintains the administrative independence of the present points in the infrastructure, but it allows the interaction among them by means of specific management functionsII Workshop de Ingeniería de Software y Bases de Datos (WISBD)Red de Universidades con Carreras en Informática (RedUNCI

CONCEPTUAL KMS ARCHITECTURE WITHIN ENTERPRISE 2.0 AND CLOUD COMPUTING

Today, the adoption of Enterprise 2.0 is not an option, but a must for knowledge-based organizations within the changing social paradigms. The new-coming generation of employees and customers expect technological proficiency to be part of the customer-centered business models. On their turn, organizations need to apply new forms of cooperation with their employees, customers, suppliers and partners. The knowledge is recognized as crucial resource and its efficient management determines sustainability and survival of the businesses. Knowledge management is widely accepted management practice within companies, but knowledge management systems in fact are rarely used by knowledge workers (Davenport, 2005). Within the shift of emerging Web 2.0 and cloud computing, KMS have to be reconsidered from more social and user-focused perspective. An overview of the existing KMS architectures is made and main characteristics, advantages and limitations of the social software components are identified and assessed. At the end, a new model of user-centric architecture for distributed KMS is proposed, based on cloud computing and Enterprise 2.0 paradigm