Tag:programme

  • Multi es cluster data migration scheme

    Time:2021-10-27

    preface On Tuesday, the second week after joining the new company, I met another project that needs technical support: I need to participate in the verification of ES multi cluster data backup scheme. In this project, I need to pay attention to the interoperability of the two clusters. Es clusters are deployed in different k8s […]

  • STM32 network circuit design

    Time:2021-10-25

    In previous tweets《SMI interface of STM32 network》《MII and RMII interfaces of STM32 network》, all interfaces of STM32 Ethernet and external PHY are introduced. If some students are not familiar with SMI, MII and RMII interfaces, it is recommended to read the two articles mentioned above, otherwise they may not understand the following. ​ Zone 1:We […]

  • Flutter journey from scratch: Provider

    Time:2021-10-23

    Previous review Flying from scratch: statelesswidget Flying from scratch: statefulwidget Flyter journey from scratch: inheritedwidget In the last article, we introducedInheritedWidgetAnd at the end, it raises a problem. Although the inheritedwidget can provide shared data and release the call of didchangedependencies through getelementforinheritedwidgetofexacttype, the rebuild of countwidget is not avoided and the build is not […]

  • Production practice | short video production and consumption monitoring based on Flink

    Time:2021-10-21

    This paper introduces the data flow link and technical scheme of real-time monitoring indicators in detail. Most real-time monitoring indicators can be realized according to several schemes in this paper. Short video production and consumption monitoring Short video has brought a new communication field and program form. While small screen and fast rhythm have become […]

  • Practice of Apache Hudi in building real-time data lake at station B

    Time:2021-10-21

    Introduction: station B selects Flink + Hudi’s data Lake technology scheme and its optimization.Yu Zhaojing, the author of this paper, introduced why station B chose Flink + Hudi data Lake technology scheme and its optimization. The main contents are as follows: Traditional offline warehouse pain pointsTechnical scheme of data LakeHudi mission stability assuranceData entry practiceIncremental […]

  • Go mod graph visualization — gmchart

    Time:2021-10-20

    background Previous buildgolangA problem was that the dependent package version was clearly specified, and the version number was automatically raised during construction. I didn’t know why at that time. I know there’s one in the backgo mod graphThe command can list all dependencies. After trying, it is not intuitive at all. It has to be […]

  • Data scheme of Internet of things

    Time:2021-10-19

    1、 Foreword It can often be seen in science fiction movies / CG that a commander points out the country to a large data screen in front of him. The big data screen has various indicators and summary data, which are displayed through various graphics.From the perspective of products, the determination of indicators and summary […]

  • Algorithm (leetode, with mind map + all solutions) sum of (1) two numbers of 300 problems

    Time:2021-10-7

    Title: algorithm (leetode, with mind map + all solutions) 300 questions (1) sum of two numbers Reading Guide: Project & author 1 GitHub – leetcode project warehouse 0) address of the project: https://github.com/CYBYOB/algorithm-leetcode 。 Objectives and vision: Let everyone have a certain algorithm ability to deal with the algorithm in the interview (students who can […]

  • Algorithm (leetode, with mind map + all solutions) add two numbers of (2) 300 questions

    Time:2021-10-6

    Title: algorithm (leetode, with mind map + all solutions) 300 questions (2) adding two numbers Reading Guide: Project & author 1 GitHub – leetcode project warehouse 0) address of the project: https://github.com/CYBYOB/algorithm-leetcode 。 Objectives and vision: Let everyone have a certain algorithm ability to deal with the algorithm in the interview (students who can draw […]

  • The second timing asynchronous request callback scheme implemented by PHP + crontab + shell

    Time:2021-10-1

    Scheme introduction The scenario of this scheme: one day, there is a business demand that needs to synchronize some asynchronous requests such as our information or order status to a third party. Here, the processing of timing time and delay time messages will occur. Many message queuing schemes have been considered (such as rabbitmq, cloud […]

  • Database | query optimization (1)

    Time:2021-10-1

    overview Since SQL is a declarative language, users only tell the DBMS what they want to get, but do not indicate how to calculate. Therefore, DBMS needs to convert SQL statements into executable query plans. However, there can be multiple query schemes for the same data, and the performance gap is very large. The task […]

  • Global acceleration scheme for OSS object storage

    Time:2021-9-26

    Business scenario OSS object storage, as a mass, secure, low-cost and high lasting cloud storage service, is deeply loved by the majority of developers. However, in the global business scenario, whether OSS is located overseas or in mainland China, it will lead to poor upload and access quality of other users. This paper aims to […]