Category: Administration

Building a server for graphic and CAD/CAM applications for remote work via RDP based on used CISCO UCS-C220 M3 v2

Almost every company now has a department or a group working with CAD/CAM or heavy design programs. This user group shares serious hardware requirements: a lot of memory—64GB or more, a professional graphics card, a fast SSD, and reliability. Often, companies buy a few powerful PCs (or graphic stations) for some users in these departments while others get less […]

Hosting the website on a home router

I have long wanted to 'touch' internet services by setting up a web server from scratch and launching it online. In this article, I want to share the experience of transforming a home router from a narrow-function device into a practically full-fledged server. It all started when my trusty TP-Link TL-WR1043ND router stopped meeting the needs of my home network; I craved the 5GHz band and faster access […]

From a 'startup' to thousands of servers across a dozen data centers. How we pursued growth in our Linux infrastructure.

If your IT infrastructure is growing too quickly, you will sooner or later face the choice of either incrementally increasing human resources to support it or starting automation. For a while, we lived in the former paradigm, and then the long journey towards Infrastructure-as-Code began. Of course, NSPK is not a startup, but such an atmosphere prevailed in the company during its early years, […]

Data Center Air Corridor Isolation Systems. Part 2. Cold and Hot Corridors. Which one do we isolate?

There are two installation options for a containerization system in an already operational machine hall (I will discuss the installation of isolation systems in construction machine halls in the next part). In the first case, we isolate the cold corridor, and in the second – the hot corridor. Each option has its own characteristics, advantages, and disadvantages. Cold Corridor Isolation Principle of Operation: a perforated […] is used to supply cold air flow into the corridor.

Saving on cloud costs with Kubernetes on AWS

The translation of this article has been prepared ahead of the launch of the "Infrastructure Platform Based on Kubernetes" course. How can you save on cloud costs when working with Kubernetes? There is no one correct solution, but this article outlines several tools that can help you manage resources more efficiently and reduce cloud computing expenses. I wrote this article with Kubernetes for AWS in mind, […]

NewNode — a decentralized CDN from the FireChat developer

Recently, I came across a mention of something called NewNode: NewNode is an SDK for mobile development that makes any application immune to any censorship and DDoS, dramatically reducing server load. P2P network. It can theoretically work without the internet. It looked quite chaotic, but interesting, so I started digging deeper. There was no project description in the repository, so […]

"Open Sesame": access to the data center without paper logs.

We detail how we implemented an electronic visitor registration system with biometric technologies in our data center: why it was needed, why we developed our own solution again, and what benefits we gained. Visitor access to a commercial data center is a critical aspect of the facility's operations. The data center's security policy requires precise tracking of visits and monitoring of dynamics. A few years ago, we […]

Sentry remote bug monitoring in React frontend applications

We are exploring the use of Sentry with React. This article is part of a series starting with the error reporting in Sentry example: Part 1. Implementing React. First, we need to add a new Sentry project for this application from the Sentry website. In this case, we select React. We will re-implement our two buttons, Hello and Error, in a React application. We […]

MLOps — Cook book, chapter 1

Hello everyone! I am a CV developer at KROK. For 3 years, we have been implementing projects in the field of CV. During this time, we have done various things, such as monitoring drivers to ensure they do not drink, smoke, talk on the phone, or look away from the road while driving; capturing those who drive in bus lanes and […]

The History of the Internet, The Era of Fragmentation, Part 4: Anarchists

<< Previous: Statisticians From approximately 1975 to 1995, computers became available much faster than computer networks. Initially in the USA, and later in other wealthy countries, computers became commonplace for affluent households and appeared in nearly all educational institutions. However, if users of these computers wanted to connect their machines for sharing […]

The History of the Internet, Era of Fragmentation, Part 3: Statisticians

<< Previous: Sowing the Wasteland In spring 1981, after several minor trials, the French telecommunications administration (Direction générale des Télécommunications, DGT) began a large-scale experiment to implement videotex technology in Brittany, in a locality called Île et Vilaine, named after the two rivers flowing nearby. This was a prelude to the full-scale launch of the system throughout the French metropolis, planned for […]

Computer system simulators: the well-known full-platform simulator and the lesser-known cycle and trace models.

In the second part of the article about computer system simulators, I will continue to explain in simple terms about computer simulators, specifically full-platform simulation, which the average user most often encounters, as well as about the clock cycle model and tracks that are more widespread among developers. In the first part, I explained what simulators are in general and about the levels […]

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