Percorrer por autor "Pousa, Duarte"
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- Benchmarking of bare metal virtualization platforms on commodity hardwarePublication . Pousa, Duarte; Rufino, JoséIn recent years, System Virtualization became a fundamental IT tool, whether it is type-2/hosted virtualization, mostly exploited by end-users in their personal computers, or type-1/bare metal, well established in IT departments and thoroughly used in modern datacenters as the very foundation of cloud computing. Though bare metal virtualization is meant to be deployed on server-grade hardware (for performance, stability and reliability reasons), properly configured desktop-class systems are often used as virtualization “servers”, due to their attractive performance/cost ratio. This paper presents the results of a study conducted on such systems, about the performance of Windows 10 and Ubuntu Server 16.04 guests, when deployed in what we believe are the type-1 platforms most in use today: VMware ESXi, Citrix XenServer, Microsoft Hyper-V, and KVM-based (represented by oVirt and Proxmox). Performance is measured using three synthetic benchmarks: PassMark for Windows, UnixBench for Ubuntu Server, and the cross-platform Flexible I/O Tester. The benchmarks results may be used to choose the most adequate type-1 platform (performance-wise), depending on guest OS, its performance requisites (CPU-bound, IO-bound, or balanced) and its storage type (local/remote) used.
- e-SmallFarmer - a solution for small farmingPublication . Pinto, Diogo; Alves, Rui; Matos, Paulo; Pousa, DuarteThe emergence of concepts such as Internet of Things, Cloud Computing has been adding improvements in different sectors of human life activity. The agricultural sector is no exception, and it begins to appear the first systems that use these new concepts, as is the case of, use of drones and associated technology applied to fighting pests or the use of sensor networks to monitor productions. However, the technological gap between urban and rural areas is becoming ever wider, and the arrival of these new concepts in rural areas is taking place very slowly. In order to accelerate this technological transformation, it’s necessary to find tools that reduce these differences, leveraging these rural regions in terms of technology and, at the same time, providing access to new markets. In this article is proposed, a solution to the problem of the lack of production flow, allowing producers in low-density regions to access markets that until now would be impossible to reach, while providing an solution to the problem of shortage of labour and the increase in abandoned land in Portugal.
- Evaluation of type-1 hypervisors on desktop-class virtualization hostsPublication . Pousa, Duarte; Rufino, JoséSystem Virtualization has become a fundamental IT tool, whether it is type-2/hosted virtualization, mostly exploited by end-users in their personal computers, or type-1/bare metal, well established in IT departments and thoroughly used in modern datacenters as the very foundation of cloud computing. Though bare metal virtualization is meant to be deployed on server-grade hardware (for performance, stability and reliability reasons), properly configured desktop-class systems or workstations are often used as virtualization servers, due to their attractive performance/cost ratio. This paper presents the results of a study conducted on commodity virtualization servers, aiming to assess the performance of a representative set of the type-1 platforms mostly in use today: VMware ESXi, Citrix XenServer, Microsoft Hyper-V, oVirt and Proxmox. Hypervisor performance is indirectly measured through synthetic benchmarks performed on Windows 10 LTSB and Linux Ubuntu Server 16.04 guests: PassMark for Windows, UnixBench for Linux, and the cross-platform Flexible I/O Tester and iPerf3 benchmarks. The evaluation results may be used to guide the choice of the best type-1 platform (performance-wise), depending on the predominant guest OS, the performance patterns (CPUbound, IO-bound, or balanced) of that OS, its storage type (local/remote) and the required network-level performance.
- A evolução da pequena agriculturaPublication . Alves, Rui; Pousa, Duarte; Pereira, João Paulo; Oliveira, Pedro Miguel CarneiroWith the rapid evolution of industry 4.0, many of the areas are envolving at an accellerated pace, as they begin to integrate concepts such as Internet of Things, Cloud Computing and others into their projects.
- Practical study of bare metal virtualization platformsPublication . Pousa, Duarte; Rufino, JoséWith the hardware breakthroughs accomplished through the years, the idea of “software defined hardware” has become a reality. Hypervisors such as KVM, Xen, Hyper-V and ESXi enable the cloud of today, with hardware consolidation bringing a reduction in operating costs. In this scope, it is imperative to address the performance of all the different virtualization implementations, in order to discover any potential bottlenecks or bugs. In this work, the performance of all the prominent Type-1 virtualization platforms was analyzed, using guests representative of the Windows NT and Linux kernels, in the form of Windows 10 LTSB and Ubuntu Server 16.04 LTS. The effectiveness of the CPU scheduler of each hypervisor is put to the test, as well as the storage backend performance under multiple scenarios (iSCSI, NFS and local). To achieve this end goal, the tests were all performed under the same conditions. As such, an effort was made in terms of automation. Additionally, the benchmarks were performed using platforms representative of each hypervisor: KVM is represented by oVirt and Proxmox, Xen by XenServer and ESXi by VMware Vsphere. These platforms cover most of the bare metal virtualization market. The outcome of this study revealed that all the current implementations provide near native performance, at least when there is no resource overcommitment. That being said, there are some outliers, namely Hyper-V, which seems to have significant CPU/memory access overhead, while displaying a clear lead in terms of disk I/O performance.
- Practical study of bare metal virtualization solutionsPublication . Pousa, Duarte; Rufino, JoséWith the hardware breakthroughs accomplished through the years, the idea of software defined hardware has become a reality. Hypervisors such as KVM, Xen, Hyper-V and ESXi enable the cloud of today, with hardware consolidation bringing a reduction in operating costs. In this scope, it is imperative to address the performance of all the different virtualization implementations, in order to discover any potential bottlenecks and bugs. In this work, the performance of all the prominent Type-1 virtualization platforms is analyzed, using guests representative of the Windows NT and Linux kernels, in the form of Windows 10 LTSB and Ubuntu Server 16.04 LTS. The effectiveness of the CPU scheduler of each hypervisor is put to the test, as well as the storage backend performance under multiple scenarios (iSCSI, NFS and local). In short, this project provides a snapshot of the current state of the virtualization market, covering CPU, Memory, 2D & 3D Graphics performance of oVirt, Proxmox, XenServer, Hyper-V and VMware Vsphere. All the benchmarks were executed using their own default settings, with some automation scripts, in order to accelerate the process and exclude variability as much as possible. Among the selected benchmarks were: Passmark Performance Test 9 to benchmark Windows performance; Unixbench, providing a way to extrapolate the performance of Linux guests; (ez)FIO allowed in-depth analysis of filesystem performance across platforms. Concluding, there are a few generalizations that can be made from the information gathered: XenServer, oVirt and Proxmox require the presence of xentools/virtio in order to provide good I/O throughput; GPU passthrough provides native performance as long as there is no resource overcommitment; VMware's Vsphere provides impressive CPU performance, edging out the competition, with 98% of the native performance; Hyper-V offers mediocre 2D Desktop performance (28% of the native performance), as such, it should not be used in VMs that provide interactive desktops; Similarly, Hyper-V's performance plunges in memory related workloads, when compared to the remaining platforms and bare metal, with a mere 83%; The remote I/O results crown iSCSI as best performer, with double the performance of NFS; All the open source platforms (Proxmox, oVirt and XenServer) display impressive remote I/O performance, in both iSCSI and NFS.