A Performance Analysis of Virtual Mail Server on Type-2 Hypervisors

Virtualization is now the most efficient and successful procedure to use server resources. Virtualization is a technology that will efficiently allow the instructions or programs based on the available hardware. With the help of virtualization, we can achieve benefits like reduced capital and operating costs, minimized downtime, increased productivity, and good disaster recovery, etc. This work compares the virtual mail server performance on 3 different Hypervisor software. The 3 different type-2 hypervisor software we chose to compare were Kernel-based Virtual Machine (KVM), Oracle VirtualBox, and VMware. A computer system that sends and also receives an email over a network either on LAN or the internet is called a Mail Server. Although large ISPs and public email services have their dedicated hardware, in most cases, the web servers and mail servers are hosted on a single machine by virtualization. When a Mail server is implemented on the hypervisor, it is then considered as a virtual mail server. A virtual mail server is good at load balancing and has many more benefits. This paper presents how to implement a virtual mail server and shows the comparative results of the virtual mail server on different type-2 hypervisor software. HIGHLIGHTS Virtualization will efficiently run the instructions or programs based on the available hardware The virtual mail server has more significant advantages than the standard mail server. It helps in achieving faster deployment of mail servers with fewer hardware requirements Comparison of the performance of the virtual mail server on three different Type-2 Hypervisor software: Kernel-based Virtual Machine (KVM), Oracle VirtualBox, and VMware The web servers and mail servers can be hosted on a single machine by virtualization A virtual mail server is best for load balancing and disaster recovery as well

Computer Simulation of Ideological and Political Teaching under Big Data of Complexity

This study is to discuss the application of computer simulation technology (CST) in ideological and political teaching (I&P teaching) and promote the reform of ideological and political teaching in the era of big data. In this study, a set of computer simulation system for I&P teaching is constructed, and targeted research is launched from this. The main research results are as follows: Firstly, a computer simulation system for ideological and political teaching is designed based on the Apriori algorithm and other theoretical foundations. The system includes a user layer, a business layer, and a data layer. The main modules of the system include the website (WEB) server, Mail server, and user terminal. Secondly, the system is tested accordingly. The performance test and function test results reveal that when the maximum number of concurrent users is 500, the system can run normally with the maximum response time of 6.6 s and the good condition of various functions, so it can meet the actual needs of universities. Finally, in comparison with the conventional I&P courses, the proposed system can effectively improve the attitudes towards I&P courses of students, increase their satisfaction and acceptance of I&P teaching, and contribute to the mastery of knowledge. Therefore, the designed system can realize a good actual teaching effect and show reliable application value. In addition, the results of this study can provide scientific and effective reference materials for subsequent research on I&P teaching.

Identification and Ranking of Cloud-Based Applications in E-Learning of Afghanistan: A Case of Public Universities

Cloud-based Applications are suitable tools in the E-learning system, and they bring the most facilities in E-learning due to availability and on-demand self-services. During Covid-19 lockdown, while presential learning stopped and E-learning started. The Ministry of Higher Education has begun E-learning in public and private universities. Therefore, Afghanistan’s universities used Cloud-based Apps in E-learning, but these Apps are not identifying and ranking in the E-learning of Afghanistan. This study aims to identify and rank the Cloud-based Apps in terms of usefulness and effectiveness in E-learning using state-of-the-art, and its usage in public universities of Afghanistan. To get an accurate answer to the defined questions, mixed research was used. Therefore, an online questionnaire was distributed randomly to six public universities in six different parts of Afghanistan. The respondents were divided into two categories (lecturers and students) and asked to respond to Cloud-based Apps usage and effectiveness in E-learning. The responses were analySed using Chi-Square Tests. The result showed the most, low, and lowest useful Cloud-based Apps in E-learning. In conclusion, the research finding showed that Google Classroom was the most LMS, WhatsApp was the most mobile instant messaging, Gmail was the most E-mail server and Skype was the most video conferencing Cloud-based Apps in E-learning in most public universities of Afghanistan.

Strongmen Don’t Pivot

Chapter 5 focuses on the 2016 general election. Having conquered the GOP’s best and brightest in the primary, Donald Trump had no interest in compromises; his version of unity was allowing Republican politicians and party officials a chance to accept his terms. Why compromise with the elites he had vilified before his roaring crowds? No matter what mainstream media thought of his racism, sexism, and bluster, there was a whole online system of nativists and nationalists occupying the ideological space to the right of Fox News who were more than happy to promote Trump, unfiltered. He won support from major evangelical leaders when, without hedging or caution, he became the first presidential candidate to flat-out promise “pro-life” judges. The GOP establishment—horrified by Trump’s campaign but scared of his rabid following—stayed largely silent. When Hillary Clinton let loose about the “deplorables” who liked Trump’s intolerance, it became a defiant note of pride among the whites she attacked, and proof she did not care about their economic woes. Trump doubled down on his nativist populism, aided by timely releases of hacked DNC e-mails by WikiLeaks and the reopening of an FBI investigation into Clinton’s use of a private e-mail server. On Election Day, the unimaginable occurred.

A Secure Methodology for Filtering Spam & Malware in E-mail System and Secure E-mail Testbed Setup

E-mail system is one of the critical infrastructures of any organization. It is necessary to ensure that the mail servers in use should be secured in such a way that no security properties like confidentiality, integrity, and authenticity are compromised. To achieve these security properties we have setup a secure e-mail server testbed that provides security against malware and spam, and guaranties secure e-mail delivery. This paper proposes a secure methodology for filtering spam and malware in the e-mail system, comprising standard layers of protocols and policies. An experimental testbed is established to evaluate the effectiveness of our methodology and was tested with spam and malware e-mails. Our results showed an accuracy of 95 percent, against a typical configuration of an e-mail system.

A Dockers Storage Performance Evaluation: Impact of Backing File Systems

This paper reports on an in-depth examination of the impact of the backing filesystems to Docker performance in the context of Linux container-based virtualization. The experimental design was a 3x3x4 arrangement, i.e., we considered three different numbers of Docker containers, three filesystems (Ext4, XFS and Btrfs), and four application workloads related to Web server I/O activity, e-mail server I/O activity, file server I/O activity and random file access I/O activity, respectively. The experimental results indicate that Ext4 is the most optimal filesystem, among the considered filesystems, for the considered experimental settings. In addition, the XFS filesystem is not suitable for workloads that are dominated by synchronous random write components (e.g., characteristical for mail workload), while the Btrfs filesystem is not suitable for workloads dominated by random write and sequential write components (e.g., file server workload).

MENINGKATKAN KETERAMPILAN SISWA DALAM PEMBELAJARAN DATABASE, MAIL SERVER DI SEKOLAH SMKN 9 SURAKARTA

In improving the quality of student skills in the process of learning databases, mailserver at SMKN 9 SURAKARTA, schools not only depend on the quality of managers but also improvement of management systems and the development of students' ability to apply database concepts. Mastery of database concepts is very important in order to improve student skills and improve student creativity in developing websites and improving the quality or ability of students so they can compete in the world of work. The database is one of the important components in information systems, with the information system it will provide accurate, timely and relevant information for its users so that it can be used for decision making. Teacher strategies in improving Database skills at SMKN 9 SURAKARTA, in delivering the teacher's material, first explain and explain clearly and hatefully then give examples of outputs from the database program, so students will try to be more competitive and efficient and try to improve skills in learning databases the.