Administration Section
We often discuss energy-saving opportunities in data centers through thoughtful equipment placement, optimal cooling, and centralized power management. Today, we will talk about how to save energy in the office. Unlike data centers, electricity in offices is needed not only for equipment but also for people. Therefore, achieving a PUE ratio here around […]
The Webalizer utility and Google Analytics tool helped me for many years to get an idea of what happens on websites. Now I understand that they provide very little useful information. With access to my access.log file, figuring out statistics is very simple and requires only basic tools such as sqlite, html, SQL, and any scripting […]
Welcome, Habr! Once upon a time, we were the first to introduce the Kafka topic to the Russian market, and we continue to monitor its development. In particular, we found the interaction between Kafka and Kubernetes interesting. An overview (and quite cautious) article on this topic was published in the Confluent company blog last October, authored by Gwen Shapiro. Today, we […]
The biggest transport problem in St. Petersburg is the bridges. At night, you have to rush out of the pub before finishing your beer because of them. Or pay twice the usual taxi fare. In the morning, you need to carefully calculate your time so that as soon as the bridge opens, you can quickly make it to the station like a nimble mongoose. The option of ‘staying somewhere in the center near the station’ is not […]
Who is this article for? This article may be of interest to system administrators facing the task of creating a service for 'one-time' workstations. Prologue A request was made to the IT support department of a young, rapidly developing company with a small regional network to establish 'self-service stations' for their external clients. These stations were intended for registration on the company's external portals, uploading […]
Good afternoon, colleagues. The time has finally come to fulfill my promise and share how everything continued and concluded. I apologize for the delay. There will be 2 parts: RMX1500 CMA4000 The text below will contain a lot of letters and may provoke a misjudgment of my attitude towards this decision. In conclusion, I will reveal that I have a neutral but positive view of Polycom, […]
There is a limit on LinkedIn — a limit on commercial use. It is highly likely that you, like I did until recently, have never encountered or heard of it. The essence of the limit is that if you use the people search feature outside your contacts too frequently (there are no exact metrics; it's determined by the algorithm based on your actions — how often […]
Do you love repeating routine operations over and over? Well, I certainly don't. But every time I worked with the Rostelecom storage in an SQL client, I had to manually write out all the joins between the tables. In fact, in 90% of cases, the fields and conditions for joining the tables matched from query to query! It would seem that any SQL client has auto-completion features, but […]
Why do you need special software for technical support, especially if you already have a bug tracker, CRM, and email? Hardly anyone thinks about this, because companies with strong technical support have likely had a helpdesk system for a long time, while others handle client inquiries and requests 'on the fly,' often just via email. This can lead to […]
We all love Ansible, but Ansible is YAML. There are many formats for configuration files: lists of values, key-value pairs, INI files, YAML, JSON, XML, and many others. However, for several reasons, YAML is often considered particularly difficult among them. Specifically, despite its refreshing minimalism and impressive capabilities for handling hierarchical values, the syntax of YAML...
Hello, Habr! In this article, I want to tell you about a wonderful tool for developing batch data processing workflows, for example in corporate DWH infrastructure or your DataLake. We'll talk about Apache Airflow (hereafter Airflow). It has been unjustly neglected on Habr, and in the main part, I will try to convince you that Airflow is at least worth considering...
Preface: By fate, I transitioned from the world of academic science (medicine) to the world of information technology, where I have to use my knowledge of experimental design methodology and data analysis strategies, while applying a new technology stack. During the process of mastering these technologies, I face a number of challenges that, fortunately, I am currently managing to overcome. Perhaps this post...