Abstract-Network failure in cloud datacenter could result from inefficient resource allocation; scheduling and logical segmentation of physical machines (network constraints). This is highly undesirable in Distributed Cloud Computing Networks (DCCNs) running mission critical services. Such failure has been identified in the University of Nigeria datacenter network situated in the south eastern part of Nigeria. In this paper, the architectural decomposition of a proposed DCCN was carried out while exploring its functionalities for grid performance. Virtualization services such as resource allocation and task scheduling were employed in heterogeneous server clusters. The validation of the DCCN performance was carried out using trace files from Riverbed Modeller 17.5 in order to ascertain the influence of virtualization on server resource pool. The QoS metrics considered in the analysis are: the service delay time, resource availability, throughput and utilization. From the validation analysis of the DCCN, the following results were obtained: average throughput (bytes/Sec) for DCCN = 40.00%, DCell = 33.33% and BCube = 26.67%. Average resource availability response for DCCN = 38.46%, DCell = 33.33%, and BCube = 28.21%. DCCN density on resource utilization = 40% (when logically isolated) and 60% (when not logically isolated). From the results, it was concluded that using virtualization in a cloud DataCenter servers will result in enhanced server performance offering lower average wait time even with a higher request rate and longer duration of resource use (service availability). By evaluating these recursive architectural designs for network operations, enterprises ready for Spine and leaf model could further develop their network resource management schemes for optimal performance.
Cloud based libraries connect individuals to on-demand information needed to solve problems, expand frontiers and re-shape the future. In the era of disruptive computing, a digital library model using cloud computing Infrastructure as a Service (IaaS) is proposed. The proof of concept is used to demonstrate the viability of deploying and running virtualized digital library in Nigerian higher institutions. Lean design phases are used in developing the library application program interface (API) as well as the network design. Programming languages such as CSS, JavaScript, PHP and MYSQL are used for the API integration while demonstrating a hypervisor based server infrastructure on a Wi-Fi hotspot. For access control on the network, a network IP address configuration based on classless inter-domain routing (CIDR-192.168.0.0/24) is applied while using TP-Link 3G/4G Wireless N-Router (TL-MR3420) access point for 300Mbps wireless connectivity. Front-end vulnerability threats are addressed during the coding phase while demonstrating improvement on the level of services provided for resource accessibility and management. A faculty wide scenario in Federal University of Technology is used as a validation case study. The proposed system is flexible, offers robust security support with 64/128bit wired equivalent privacy (WEP), WPA/WPA2 and WPA-PSK/WAP2-PSK encryption standards. Cloud-DLT eradicates the challenges and inconveniences associated with accessing and managing the library resources. The work highlighted its usefulness and implications to academics and students in the next few years.
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