Administration Section
Hello everyone! My name is Nikolai Golov. I previously worked at Avito, where for six years I led the Data Platform, managing all databases: analytical (Vertica, ClickHouse), streaming, and OLTP (Redis, Tarantool, VoltDB, MongoDB, PostgreSQL). During this time, I dealt with a wide variety of databasesāmost diverse and unusual onesāand explored non-standard use cases. Now […]
The Telegram audience is growing daily at an exponential rate, thanks to the convenience of the messenger, the presence of channels, chats, and of course, the ability to create bots. Bots can be used for various purposes, from automating communication with your clients to managing your own tasks. In essence, through a bot, you can execute any operations using Telegram: sending or requesting data, launching tasks on the server, […]
Recently, a well-known company announced that it is transitioning its line of laptops to ARM architecture. Hearing this news reminded me: while browsing EC2 prices in AWS again, I noticed the Graviton processors with a very attractive price. The catch, of course, was that this is ARM. At the time, it never crossed my mind that ARM is […]
We regularly write about how hackers often rely on code-free hacking methods to avoid detection. They literally 'survive on scraps', using standard Windows tools to bypass antivirus software and other malicious activity detection utilities. We, as defenders, are now forced to deal with the sad consequences of such cunning hacking techniques: a well-placed […]
We have already mastered the setup of VNC and RDP on a virtual server, and now we need to explore another option for connecting to the Linux virtual desktop. The NX protocol developed by NoMachine offers quite interesting capabilities, especially since it works well over slow connections. While their server solutions are expensive (client versions are free), there is also a free implementation, which we will discuss in […]
Some users rent relatively inexpensive VPS with Windows to run remote desktop services. The same can be done on Linux without having to host your own hardware in a data center or rent a dedicated server. Some may need a familiar graphical environment for testing and development, or a remote desktop with a wide bandwidth for working from mobile devices. There are plenty of options available […]
In the previous article, we discussed launching a VNC server on any type of virtual machine. This option has many drawbacks, the main one being high bandwidth requirements for data transmission. Today, we will attempt to connect to a graphical desktop on Linux via RDP (Remote Desktop Protocol). The VNC system is based on sending pixel arrays over the RFB protocol […]
It all started when the team lead of one of our developer teams asked to temporarily expose their new application, which had recently been containerized. I did that. About 20 minutes later, a request came to update the application because they had added a very necessary feature. I updated it. A couple more hours laterā¦ well, you can guess what happened next […]
Microsoft has announced the world's first large-scale experiment using hydrogen fuel cells to power servers in a data center. The 250 kW installation was made by Power Innovations. In the future, a similar 3-megawatt installation will replace traditional diesel generators, which are currently used as a backup power source in data centers. Hydrogen is being considered as a clean fuel because its combustion results in […]
Since ClickHouse is a specialized system, it is important to consider the features of its architecture during its use. In this presentation, Alexey will discuss examples of typical mistakes made when using ClickHouse that can lead to ineffective performance. Practical examples will illustrate how selecting a particular data processing scheme can significantly impact performance. Hello everyone! My name is […]
Given: VPS server with a perpetual ISPmanager Lite 5 license, 10-20 users on the server, Google Calendar with regular reminders about expiring hosting. Tired of paying for anything else, especially on subscription. Goal: to eliminate Google Calendar and manual reminders to clients about renewing hosting. To free myself from 'let them work a little longer' […]
In the beginning, there was a technology called BPF. We looked at it in the previous, Old Testament, article in this series. In 2013, thanks to the efforts of Alexei Starovoitov and Daniel Borkman, an enhanced version was developed and included in the Linux kernel, optimized for modern 64-bit machines. This new technology briefly had the name Internal BPF, […]