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Everyone is talking about the process of development and testing, staff training, increasing motivation, but these processes, when the minute of service downtime is too damn high. What to do when you conduct financial transactions under strict SLA? How to increase reliability and fault tolerance of your systems, factoring out development and testing? Following the HighLoad++ conference will take place on 6 and 7 April 2020 in St. Petersburg. Details and tickets via the link. 9 Nov, 18:00. HighLoad++ Moscow 2018, hall "Delhi + Calcutta". Abstracts and presentation. Read more →

Translation of the article prepared especially for students of the course "Linux Administrator". Here you will get answers to important questions about life, the universe and all that in Linux with advanced security. "the Important truth that things are not always what they seem, a well-known..." ―Douglas Adams, the Hitchhiker's guide to the Galaxy Safety. Improving the reliability. Compliance. Policy. The four horsemen of the Apocalypse for the system administrator. In addition to our daily tasks — monitoring, backup, implementation, configuration, updating, etc. — we are also responsible for the security of our systems. Even those systems where a third-party provider recommends us to disable enhanced security. It looks like Ethan hunt from “Mission...

Elon Musk is one of the most striking personalities of the XXI century. Engineer, entrepreneur, and a millionaire with incredible ideas. PayPal, Tesla, SpaceX — it's his brainchild, and businessman is not going to stop on just a few projects that have become internationally successful. He inspires millions of people through his example and proves that even one person is quite capable of changing the world for the better. Elon Musk speaks at many conferences and seminars, gives interviews, and leads the social network. Many of his fans noticed that his English is somewhat different from the classic American. In this article, we analyze in detail the English Elon musk, his accent and pronunciation of words. And analyse how over the last 20 years has changed...

Probably very few of what pros need to explain what is Memtest86+, perhaps it has become more or less standard in testing RAM memory on a PC. When one of the previous parts, I came across the battered bar of the memory that comes included with the fee, he (along with supporting DDR2 netbook) seemed the obvious solution. Another issue is that there is in principle an unstable operation of the system was visible to the naked eye. In more tricky cases, I heard that in addition to the banal "tapping" of memory cells indefinitely, this tool uses some special patterns of data, where errors in the DDR revealed more likely. In General, a wonderful thing, pity that even the title indicated: 86 — "Only for x86-compatible systems." Or not? Under the cut you will see...

Russian Railways plan to spend about 1 billion on the computers that collected in the domestic processors "Elbrus" under a Russian OS on the Linux kernel. This amount is offered as the maximum price of the contract for delivery in the tender theme. It is planned to purchase 15 thousand domestic computers. Applications will be accepted up to 23 January 2020. The auction is scheduled for February 5. To transfer the equipment ordered within the tender, it is planned to may 25, 2020. Computers will be supplied to departments of the Railways across the country. It is information-computing centre, the Directorate of railway stations, communications, traction, passenger facilities, infrastructure, railcar rolling stock, healthcare, traffic control, repair of...

Consider how the algorithms in banking scoring, which metrics are used and what parameters affect the borrower will give the loan or not. The article describes the competition with kaggle to predict probability of default and are influencing the risk of default parameters. Error first and second kind the Goal of the Bank is to make money. The first risk faced by the credit institution giving the loan to the borrower who defaulted. Default can have different reasons, from financial difficulties of the borrower, and ending fraud. For the Bank — the error of the first kind. But if the Bank will maintain a strict policy and nobody gives loans to even those who would have returned the money, the Bank does not earn interest. Denial of credit responsible borrower...

Good day, friends! I Represent to Your attention translation of the article Kent Dodds "5 JavaScript Features I couldn't Code Without". This is my first translation, so I will appreciate any comments. 5 features of JavaScript, without which I would not be able to write code Before we begin, let me explain a bit about the code I write. Almost all of my code consists of Javascript, plus some HTML and CSS. I'm writing both client and server side JavaScript. I'm testing your code. I create and distribute the library is open source, which is used by thousands of developers around the world. For the frontend I'm using React for the backend Express or peer-to-peer computing. Here are 5 features to JS, without which I would not be able to write code. In no...

Isn't it amazing that in a world mired in baseless hatred that threaten civilization itself, men and women, old and young, partly or completely separated from the evil flow of everyday life to devote themselves to the cultivation of beauty, knowledge promotion, treatment of disease, reduction of suffering, as if at the same time, there are no fanatics, multiplies the pain, ugliness and suffering? The world has always been sad and confusing, and yet, poets, artists and scientists have ignored the factors that, if they paid attention, would paralyze them. From a practical point of view, intellectual and spiritual life, at first glance, it's useless activities, and people take them because they achieve a greater degree of satisfaction than otherwise. In this...

44-year-old billionaire from Japan Yusaku of Maezawa, which became the first space tourist, who paid for a flight on the spaceship SpaceX to the moon, announced that is looking for a companion for the flight. Man tweeted a link to a Japanese streaming service Abema TV. It will broadcast the documentary "Fans of the full moon" on the search for a companion. It is also possible to apply for participation in the competition. "Maezawa old dream to go into space. He wants to visit this special place with someone special," — said on the website. Read more →

Hi! My name is Sasha, I'm an iOS developer in the team that makes the tape Vkontakte. Let me tell you how we optimize the mapping of an interface and circumvent the related problems. you can imagine what the tape VK. This is the screen where you can view a variety of content: texts, static images, animated gifs, embedded elements (video and music). All of this should be displayed smoothly, hence the high performance requirements of solutions. Now, let's see what are the standard approaches to working with the mappings and the constraints or advantages should be considered. If you'd prefer to listen than read, the video report is here. Read more →

A Few years ago, many organizations consider DevOps as a promising experiment, but not the main approach to developing software. Now DevOps is a proven and powerful set of practices and tools development and deployment, accelerating the releases of new products and to improve productivity. More importantly: the effect of DevOps focus on General business growth and increase its profitability. the Team Mail.ru Cloud Solutions has translated the most interesting from the report 2019 Accelerate State of DevOps Report, compiled by experts in the DevOps Research & Assessment (DORA). The study involved 31 000 specialists from around the world. Let's see what has changed in the industry in 2019 and how the business can improve the efficiency of software delivery...

In the last series... With a year ago, I wrote about the management of public lighting in one of our cities. It was all very simple: in the schedule on and off the power to the lamps through SUNO (wardrobe lighting control). In SUNA stood relay team which included a chain of lights. Interesting, perhaps, only that it was done through LoRaWAN. As you remember, we had originally built on the modules of SI-12 (Fig. 1) from VEGA. At the stage of the pilot we immediately had problems. figure 1. Module C-12 Read more →

Members of the Commission of Sciences to combat the falsification of scientific research, on the podium, academician Yevgeny Alexandrov. At the beginning of January 2020, the Commission of the Russian Academy of Sciences (RAS) to counter the falsification of scientific research announced that it is Recalling 263 869 articles from magazines, seventeen of which medical. But this is only the first part of this Antiplagiat campaign. From July 2019, the Commission recorded in the different logs 2528 articles, which contained all the signs of unfair borrowing, unclear authorship and samoubiitsy publications. Read more →

Imagine this situation. Cold October morning, design Institute in the regional centre of one of the regions of Russia. Someone from HR comes on one of the pages of vacancies on the Institute's website posted a couple days ago and sees there the picture of the cat. Morning quickly ceases to be boring... In this article, Paul Suprunyuk, the head of the technical Department audit and consulting Group-IB, explains the place occupied by social engineering attack in projects to assess the practical security, what an unusual shape they can purchase, as well as how to defend against such attacks. The author specifies that the article is expository, however, if some aspect will interest readers, experts Group-IB willing to answer questions in the comments. Read more...

Time reporting in Excel is fast becoming a trend for convenient submission tools and analysis of information is visible in all spheres. We have long discussed within the digitization reporting and chose a system of visualization and self-service Analytics Tableau. Alexander Bezugly, the head of Department of analytic solutions and reporting of the Group "M. Video-Eldorado", told about the experience and outcome of the military build dashboards. I have to Say, not everything that was planned has been achieved, but the experience was interesting, I hope it will be useful to you. But if someone have any ideas how we could do better, I will be very grateful for tips and ideas. Under the cut of what we encountered and what was learned. Read more →