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Habrahabr / Interesting / topical publications

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If the search string habré enter “Jira Badoo”, the results will take more than one page: we referred to it almost everywhere, because it plays an important role in our processes. Each of us wants from it a little bit different. the Developer who came up with the task to review, expects that the task specified thread, there are links to diff and log changes. The developer who wrote the code expects to see in the Jira comments on the review. The tester that receives the task after them, wants to see test results and to be able to run the required assemblies, without navigating to other interfaces. Product managers generally want to create ten development tasks at a time by pressing one button. And all this is available today and automatically. A big part of...

We love PHP for its simplicity: you write code, refresh the browser and immediately see the changes. But if it comes to console commands, which can be long-lived processes — for example, if we are writing an asynchronous HTTP server to download file — development can be very painful. In the ecosystem of PHP was not a suitable solution to automatically restart the app when changes in the source code. So I decided to make my own tool in PHP, and accessed through Composer. It's like Nodemon, but in PHP Read more →

Founder Tazeros Global Systems Arthur Hechuan told about the collection of data in social networks and how to design a questionnaire in the profile to meet them billionaires? The Studio, which recorded the interview, is at a height of 332 meters. Generally, in the "Federation Tower" are the highest apartments in Europe. The tower height of 374 meters, 97 floors. Disclaimer. This article is a transcript of an interview with Arthur Chacoana channel Forbes. There are people that save time and I love the text, there are those who cannot work or on the road watch the video, but would like to read Habr, is hard of hearing, for which sound track is not available or difficult to comprehend. We decided for all of them and you can decipher excellent content. Who...

A Former coal mine, in which razmeschatsya store Arctic World Archive. Photo: Guy Martin / Bloomberg Businessweek Free software is a cornerstone of modern civilization and the common heritage of all mankind. The mission of the program Archive GitHub to keep this code for future generations to history of the library of Alexandria will never happen again. To do this, GitHub will make a lot of backups on different media, including long-term storage Code Arctic Vault in Svalbard. It is located in the former coal mine at a depth of 250 meters in the permafrost and designed for a shelf life of at least 1000 years. the program code of humanity will make on 2 February 2020. Read more →

Recently Redash started to change one system of tasks to another. Namely, they began the transition from Celery to RQ. In the first stage to the new platform moved only those jobs that do not perform queries directly. Among these tasks — sending emails, figuring out what queries needs to be updated, the entry of custom events and other supporting tasks. After the deployment of all this, it was observed that RQ is workeri require much more computing resources for the solution of the same volume of tasks that were previously done by means of Celery. the Material, the translation of which we are releasing today on the story about how Redash found the cause of the problem and deal with it. Read more →

The IT Industry is developing rapidly. Creating new technologies and knowledge, ideas and startups, industry giants are the leaders in terms of capitalization among the largest companies in the world, and more traditional human activities are increasingly using IT solutions in their development. But what is noticeable is happening right now? Not to be missed to find a decent place in the future? to understand this, we decided to ask the opinions of speakers at our conference YaTalks, which will be held in Moscow on November 30. Among our speakers — Alexander krainov Krainov, yafinder Andrey Plakhov, Andrey styskin Stiskin, Evgeny Rossinsky eross, Roman romas1982 Ivliev. And here's the questions they answer today: — What events in the world of IT for the...

Yesterday with Docker Inc., the same name behind the popular solution for containers has been a series of transformations. We can safely say that they have a certain time of waiting. After all, with the massive spread of Docker, the development of other technologies, containerization and the rapid rise in popularity Kubernetes issues to products and business Docker Inc as a whole became more and more. What was the answer? How was the headline on one of the informational resources, "the Unicorn [company valued at 1 billion USD] fell: Docker refuses enterprise". And that's what gave rise to this statement... Read more →

For the First time at this facility I visited over 10 years ago as a Junior researcher at the Institute of industrial ecology UB RAS. Few people beyond the Ural knows, but for more than 60 years in 200 km from Yekaterinburg stored thousands of tons of radioactive monazite reserves of the Soviet Union, collected to start the thorium component of the nuclear project. For a long time hidden by a veil of secrecy, this object has spawned a lot of rumors and myths. Over the past 25 years it changed owners, and discussed various options for the use of monazite around public seething with serious passion. And now, it seems, the database storage of monazite is entering the final stage of its existence. November 6, held a public hearing on the project for the export...

Recently I went back to the error analysis of floating-point numbers to improve some details in the next edition of the book Physically Based Rendering. The floating-point number is an interesting area of computing is full of surprises (good and bad), as well as clever tricks to get rid of unpleasant surprises. In the process, I came across this post on StackOverflow which informed us about an elegant algorithm for precise calculations . But before proceeding to the algorithm, you need to understand what is so cunning in the expression ? Take , , and . (This is the real meaning, which happened to me during the launch of pbrt .) When 32-bit float values we get: and . Perform the subtraction and get . But if you do the calculations in double precision, and in...

Map of the flight, the marked points with a methane concentration of over 3 000 ppm*m. And that's a lot! Imagine that you have a garbage landfill, which from time to time smokes and stinks. This is due to the fact that the decay of organic matter produces various types of gases. This produces not only methane, but also very poisonous gases, so the landfills sometimes you need to examine. this is Usually done on foot bypass with hand-held methane detector, but in practice it is very difficult, time consuming and does not particularly need the owners of the landfill. But it is necessary for the city government, municipal authorities, region, etc., where is a polygon or a sanctioned dump, environmentalists and simple people who want to breathe clean air. the...

Theme blockchain does not cease to be a source of not only all hype, but very valuable from a technological point of view ideas. Therefore I do not pass it a party and residents of the Sunny city. Look people, exploring, trying to shift its expertise in traditional infobase on the blockchain system. Until that point: one of the developments of "Rostelecom-solar" is able to check the security software on the basis of the blockchain. And along the way there are some thoughts on applications of the blockchain community. One of such hacking – how to determine the address of the smart contract to deploy using CREATE2 – today I want to share with you below. Read more →

Hello! My name is Dmitry Samsonov, I work as lead system administrator in the "Classmates". We have over 7 thousand physical servers 11 thousand containers in our cloud and 200 applications, which in different configurations form 700 different clusters. The vast majority of servers are running CentOS 7. on 14 August 2018 published information about the vulnerability FragmentSmack (CVE-2018-5391), and SegmentSmack (CVE-2018-5390). These are vulnerabilities with a network attack vector and a fairly high rating (7.5), which threatens to cause a denial of service (DoS) due to resource exhaustion (CPU). The fix in the kernel for FragmentSmack at that time proposed was not, in fact, it came much later than the publication of information about the vulnerability...

A year and a half ago, on 5 March 2018, Google released the first alpha version of its Open Source project for CI/CD called Skaffold, whose goal was the creation of "simple and reproducible development under Kubernetes", so that developers can focus on development and not on administration. What may be interesting Skaffold? As it turned out, he has a few tricks up my sleeve, thanks to which it can become a powerful tool for the developer, but can — and maintenance engineer. Get acquainted with the project and its possibilities. Read more →

Broadcast the main event for developers of high load systems. In good tradition, on 7 and 8 November we are going to share experience in building web services, allowing both to help tens, hundreds of thousands of users to solve their problems. If this time we don't meet again in SKOLKOVO, connect to the open broadcast of the Main hall of the conference. the Open stream first day of the conference HighLoad++ 7 Nov stream of reports starts at 9:45, 18:00 they will end and will start the Awards ceremony HighLoad++. the Open broadcast of the second day of the conference HighLoad++ on 8 November the first report in the Main hall and the stream starts at 11:00. Under the cut schedule and information on the reports. Read more →

Description of the algorithm logic, and the analysis of the working example in the form of a techno-demo-game WebGL2 version of this demo https://danilw.itch.io/flat-maze-web other links, see the article. this Article is in two parts, first about the logic, and the second part about the use in the game, the first part: the Key features. Links and a brief description. the Algorithm logic. Limitations of logic. Bugs/features, and bugs Angle. data Access by index. On the description of game-demo, second part: Used features of this logic. And fast rendering a million particles-pixels. the Implementation, some code comments, description of the work of the conflicts in the two sides. And interaction with the player. links to the used graphics from...