Good day. I would like to share with the community practical experience in building a data storage system for KVM using md RAID + LVM. The program will include: Assembling md RAID 1 from NVMe SSD. Assembling md RAID 6 from SATA SSDs and regular disks. Features of TRIM/DISCARD operations on SSD RAID 1/6. Creating a bootable md RAID 1/6 array on […]
"What is the difference between Kubernetes and OpenShift?" – this question arises with enviable regularity. In fact, it’s akin to asking what distinguishes a car from an engine. To continue the analogy, a car is a finished product that can be used right away, literally: you just get in and drive. On the other hand, for an engine to take you somewhere, it needs to be […]
Hello, Habr! I present to you the translation of the article "Two Nodes — The Devil is in the Details" by Andrew Beekhof. Many people prefer clusters consisting of two nodes because they seem conceptually simpler, and moreover, they are also 33% cheaper than their three-node counterparts. Although it is quite possible to build a good cluster out of two nodes, […]
The release of the compact distribution for creating firewalls and network gateways pfSense 2.4.5 has taken place. The distribution is based on FreeBSD's codebase, utilizing developments from the m0n0wall project and actively employing pf and ALTQ. Several images are available for download for the amd64 architecture, ranging in size from 300 to 360 MB, including LiveCD and an image for installation on USB Flash. Management of the distribution […]
On March 26, 2020, the Apache Software Foundation, along with volunteer developers, stewards, and incubators for 350 Open Source projects, celebrates 21 years of leadership in the field of open source software! Fulfilling its mission to provide software for the public good, the Apache Software Foundation community has grown from 21 participants (who were involved in the development of the Apache HTTP server) to 765 individual contributors and 206 committees […]
On March 26, the new version of the graphic editor Krita 4.2.9 was released. Krita is a graphic editor based on Qt, which was previously part of the KOffice suite and is now one of the most notable representatives of free software, considered one of the most powerful graphic editors for artists. A comprehensive, though not exhaustive, list of fixes and improvements: Brush outlines no longer flicker when hovering over them […]
A few months ago, we announced explain.tensor.ru — a public service for parsing and visualizing query plans for PostgreSQL. Over the past time, you’ve used it over 6000 times, but one convenient feature may have gone unnoticed — structural hints that look something like this: Pay attention to them, and your queries will become 'smooth and silky.' 🙂 And […]
A classic question that a developer brings to their DBA or a business owner to a PostgreSQL consultant almost always sounds the same: 'Why do queries take so long on the database?' The traditional set of reasons: inefficient algorithm when you decided to JOIN several CTEs with a couple of tens of thousands of records; outdated statistics if the actual data distribution in the table is already significantly […]
Introducing Windows Terminal v0.10! As always, you can download it from the Microsoft Store or from the releases page on GitHub. Below, we’ll take a closer look at the details of the update! Mouse Input The Terminal now supports mouse input in Windows Subsystem for Linux (WSL) applications, as well as in Windows applications that use virtual terminal (VT) input. This […]
The release of Wi-Fi daemon IWD 1.6 (iNet Wireless Daemon) is available, developed by Intel as an alternative to wpa_supplicant for connecting Linux systems to wireless networks. IWD can be used either standalone or as a backend for network configurators such as Network Manager and ConnMan. The project is suitable for use on embedded devices and optimized for minimal power consumption […]
The developers of the Android-x86 project, which is independent community-driven development of the Android platform port for the x86 architecture, have released the second stable version based on Android 9. This release includes fixes and enhancements that improve the performance of Android on x86 architecture. Universal Live versions of Android-x86 9 for x86 32-bit (706 MB) and x86_64 (922 […] are available for download.
The Bodhi Linux 5.1 distribution has been released, featuring the Moksha desktop environment. Moksha is developed as a fork of the Enlightenment 17 (E17) codebase, created to continue the development of Enlightenment as a lightweight desktop due to disagreements over the development policy, the expansion of the Enlightenment 19 (E19) environment, and the deterioration of the codebase's stability. Three installation images are available for download: the regular (820 MB), the lightweight […]