Administration Section
We discussed the methodology in the first part of the article; in this one, we are testing HTTPS in more realistic scenarios. A Let’s Encrypt certificate was obtained for testing, and Brotli compression was enabled at level 11. This time, we will attempt to reproduce a scenario for deploying a server on a VDS or as a virtual machine on a host with a typical processor. To accomplish this, we set a limit of: […]
Hello, Habr! In this material, we will discuss whether it is worth organizing RAID arrays based on solid-state SATA SSD and NVMe SSD solutions, and whether there will be any significant profit from this. We decided to delve into this issue by examining the types of controllers that allow this, as well as the applications for such configurations. One way or another, each of us […]
In the previous material, we already addressed the question of whether RAID is applicable to SSDs, using Kingston drives as an example, but we did so only at a zero level. In this article, we will explore the use cases of professional and home NVMe solutions in the most popular RAID configurations and discuss the compatibility of Broadcom controllers with Kingston drives. Why is RAID needed […]
Due to numerous requests from readers, we are starting a large cycle of articles on the application of serverless computing technology for developing real applications. This cycle will cover the development of applications, testing, and delivery to end users using modern tools: microservice application architecture (in serverless mode, based on OpenFaaS), a Kubernetes cluster for application deployment, and MongoDB, designed for cloud clustering and […]
What is happening? The topic of fraudulent activities committed using electronic signature certificates has gained significant public resonance recently. Federal media have made it a practice to periodically tell alarming stories about cases of improper use of electronic signatures. The most common crime in this field is the registration of a legal entity or an individual entrepreneur in the name of an unsuspecting Russian citizen. Additionally, it is also prevalent […]
In previous articles, we briefly explored the ELK stack and the configuration file settings for Logstash log parsing. In this article, we'll focus on the most essential aspect from an analytics perspective — the visualizations and tables combined into dashboards that you want to see from the system, which is the reason it was all created. Today, we will take a closer look at the visualization system […]
Creating a gateway between Wi-Fi and LoRa for UDP My childhood dream was to give every domestic 'non-Wi-Fi' device a ticket to the network, i.e., an IP address and port. After some time, I realized it was time to stop delaying. I needed to just go ahead and do it. Technical task: Make a gateway using M5Stack with an installed LoRa module (see Figure 1). The gateway will be connected to […]
At the beginning of December, Veeam Backup for AWS was released, providing a solution for backing up and recovering Amazon Elastic Compute Cloud (Amazon EC2) cloud infrastructures. With it, you can create backups of EC2 instances and store them in Amazon Simple Storage Service (Amazon S3) cloud storage, as well as create EC2 snapshot chains in native format. For […]
Hello Habr, this is MyOffice. The year 2019 was significant for us. More and more users trust us. The number of licenses sold is measured in hundreds of thousands, and over 1 million free licenses have been provided to the education system. The rapid growth in the number of clients prevents us from resting on our laurels. We are constantly improving the product, including working on unique features that […]
VACUUM can only 'clear' from a table in PostgreSQL what nobody can see — that is, there are no active queries that started before those records were changed. But what if there's an unpleasant type (a prolonged OLAP load on an OLTP database)? How can one clean an actively changing table in an environment with long-running queries without stumbling over the rake? […]
In the previous article, we introduced the ELK stack and its components. The first task an engineer faces when working with the ELK stack is sending logs for storage in Elasticsearch for subsequent analysis. However, this is easier said than done; Elasticsearch stores logs as documents with specific fields and values, meaning […]
There is a large CHP plant. It operates as usual: burning gas, producing heat for heating homes, and electricity for the grid. The primary task is heating. The second is to sell all generated electricity on the wholesale market. Sometimes snow appears in freezing weather under clear skies, but this is a side effect of the cooling towers. An average CHP consists of several dozen turbines and boilers. […]