Blog Section
Introduction I wanted to study a mail server for a long time, but I only managed to find the time now, and there wasn't much accurate information available, so I decided to write as detailed a publication as possible. This publication will cover not only postfix, dovecot, mysql, and postfixadmin, but also spamassassin, clamav-milter (a special version of clamav for mail servers), postgrey, and […]
We have designed a data center network that allows deploying compute clusters larger than 100,000 servers with a peak bisection bandwidth of over one petabyte per second. From Dmitry Afanasyev's report, you will learn about the fundamental principles of the new design, the scaling of topologies, the issues that arise, possible solutions, the peculiarities of routing, and the scaling of the forwarding plane features of modern […]
Today, educational software is a collection of applications aimed at developing specific skills in students. However, the first such systems appeared more than a hundred years ago — engineers and inventors have traveled a long path from imperfect mechanical 'educational machines' to the first computers and algorithms. Let’s dive into this in more detail. Photo: crabchick / CC BY The first experiments — both successful and unsuccessful […]
Tencent has released a new version of F-Stack 1.13, a framework based on DPDK and FreeBSD TCP/IP stack. Linux is the primary platform for the framework. The code is distributed under the BSD license. The framework allows applications to bypass the operating system's stack and instead use a user-space stack that communicates directly with network hardware. Among the stated features of the framework are: Full loading […]
After a year and a half of development, the release of F-Stack 1.13 has occurred, advancing a high-performance networking stack that operates in user space, based on the DPDK framework and FreeBSD TCP/IP stack (F-Stack is not tied to FreeBSD and considers Linux as its primary application platform). The project is utilized in various products and services by Tencent, China's largest telecommunications company. The code is distributed under […]
Disclaimer: I am a developer. I write code and interact with the database only as a user. I do not claim to be a system administrator or DBA in any way. However... It turned out that I needed to organize a backup of a PostgreSQL database. No clouds — just use SSH and make sure everything works without asking […]
Hello, friends! Today, I will continue the series dedicated to Extreme switches with an article on Enterprise network design. In this article, I will try to be as brief as possible: describe the modular approach to designing an Enterprise network, examine the types of building one of the most important modules of the enterprise network — the backbone network (IP campus), describe the advantages and disadvantages of options for redundantly protecting critical network nodes using an abstract example, design/update […]
I had the opportunity to visit Stanford University, one of the most prestigious and highly ranked educational institutions in the world, as well as one of the most advanced in the IT field. The campus and academic buildings are impressive! While I was exploring the buildings, I felt inspired and became interested in the opportunities for international students (why not?). I decided to share information and prepared an overview. The history of Stanford's establishment […]
At the current stage of software development, we can observe a variety of production roles. Their number is increasing, and the classification is becoming more complex each year, which naturally complicates the processes of selecting specialists and working with the personnel potential. Information technology (IT) is a field of highly qualified labor resources and labor shortages. Here, the process of nurturing talent and the need for systematic work with the personnel potential can be […]
Keith Packard, an active Debian developer, leader of the X.Org project, and creator of numerous X extensions including XRender, XComposite, and XRandR, has announced the release of the new standard C library PicoLibc 1.1, which is being developed for use on embedded devices with limited persistent storage and memory. During development, some code has been borrowed from the newlib library of the Cygwin project and AVR Libc, which has been developed […]
The second correction update for the Debian 10 distribution has been released, which includes accumulated package updates and fixes for issues in the installer. The release includes 67 updates to address stability issues and 49 security updates. Notable changes in Debian 10.1 include updates to the latest stable versions of the flatpak, gnome-shell, mariadb-10.3, mutter, postfix, spf-engine, ublock-origin, and vanguards packages. […]
Google aims to simplify the process of learning word pronunciation. To this end, a new feature has been integrated into the Google search engine, which will allow users to practice the pronunciation of difficult words. Users will be able to listen to the correct pronunciation of a given word. They can also speak the word into their smartphone's microphone, and the system will analyze the pronunciation and suggest what needs to be changed for optimal results. […]