Blog Section
Wireguard is a simple and secure VPN protocol, primarily developed by Jason A. Donenfeld. For a long time, the kernel module implementing this protocol was not accepted into the main branch of the Linux kernel because it used its own implementation of cryptographic primitives (Zinc) instead of the standard crypto API. Recently, this obstacle has been overcome, thanks in part to updates accepted into the crypto API. […]
The background, so to speak: Fujitsu rx300 s6 server, RAID6 made of 6 1TB disks, running XenServer 6.2, hosting several servers, including Ubuntu with multiple shares, 3.5 million files, 1.5TB of data, all gradually growing and bloating. The task: to set up data backup from the file server, partly on a daily basis, partly weekly. We have a Windows machine for backup with RAID5 […]
The next HighLoad++ conference will take place on April 6-7, 2020, in Saint Petersburg. Details and tickets can be found at the link. HighLoad++ Moscow 2018. Hall 'Moscow'. November 9, 15:00. Theses and presentation. * Monitoring — online and analytics. * Main limitations of the ZABBIX platform. * Solutions for scaling the analytics storage. * Optimization of the ZABBIX server. * UI optimization. * Operational experience […]
You don’t have to be a chip developer to program for FPGA, just as you don’t need to be a C++ programmer to write Java code. However, in both cases, it might be beneficial. The goal of commercializing both technologies, Java and FPGA, is to refute the last statement. The good news for FPGA is that with the right levels of abstraction and a set of […]
Let's take a look at the report by Alexey Lesovsky from Data Egret titled 'Fundamentals of PostgreSQL Monitoring'. In this report, Alexey Lesovsky will discuss the key aspects of PostgreSQL statistics, what they mean, and why they should be included in monitoring; which graphs should be part of monitoring, how to add them, and how to interpret them. This report will be valuable for database administrators, system […]
Every few years, the software development industry experiences a paradigm shift. One such phenomenon is the increasing interest in the microservices concept. Although microservices are not a new technology, their popularity has soared recently. Large monolithic services are now being replaced by independent, autonomous microservices. A microservice can be seen as an application that […]
At the recent FOSDEM 2020 conference, the OpenWifi project was introduced, which develops the first open implementation of the complete 802.11a/g/n Wi-Fi stack, where the signal shape and modulation are defined programmatically (SDR, Software Defined Radio). OpenWifi allows for the creation of a fully controllable implementation of all components of a wireless device, including low-level layers typically implemented in standard wireless adapters at the level of chips that are not auditable.
The upcoming Windows 10 20H1 build will bring many new features. Not long ago, it was announced that the Paint and WordPad applications would be classified as optional but still available. Now, sources indicate that a similar fate awaits the basic text editor Notepad. All three applications, which have long been essential for operating systems, may soon become non-mandatory.
Three years after its announcement at CES 2017 and two years of beta testing on PCs, NVIDIA's GeForce Now cloud gaming service has made its debut. The GeForce Now offering appears significantly more attractive compared to what Google's Stadia streaming game service has to offer its users, at least on paper. Interaction with GeForce Now is expected to provide a different experience.
There is periodically a task to search for related data by a set of keys until we accumulate the required total number of records. The most 'realistic' example is to display the 20 oldest tasks listed for employees (for instance, within a single department). This topic is often required for various management dashboards with brief overviews of work areas. In this article, we will discuss the implementation in PostgreSQL […]
Today, Linus transferred the net-next branch with WireGuard VPN interfaces to himself. This event was reported on the WireGuard mailing list. Currently, the code collection for the new Linux kernel 5.6 is ongoing. WireGuard is a fast next-generation VPN that implements modern cryptography. It was originally developed as a simpler and more user-friendly alternative to existing VPNs. The author is a Canadian expert in […]
Since WireGuard will become part of the future Linux kernel 5.6, I decided to see how to best integrate this VPN with my LTE router/access point on the Raspberry Pi. The hardware is a Raspberry Pi 3 with an LTE module and a public IP address. Here will be the VPN server (referred to in the text as edgewalker). An Android phone that will use the VPN for all communications. A Linux laptop, […]
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