Python miscellaneous

... 1, asynchronous IO CPU (memory) processing speed is much faster than IO (disk) When the "King CPU" needs to wait for the "Bronze Chicken IO" to complete the task, it can continue to work. This is called synchronous IO 老张爱喝茶, nonsense, boiled water. Appearance figures: Lao Zhang, two...


What is the difference between Hadoop and Spark, what technology is used in the industry?

... Talk about big data, I believe everyone is no stranger to the two names hadoop and Apache Spark. However, some people in the industry have recently announced that Hadoop will die and Spark will stand. Talk about big data, I believe everyone is no stranger to the two names hadoop and...


Apollo 1.0 Quick Start Guide

... About this guide 阿波罗1.0 Quick Start Guide Provides all the basic instructions to understand, install and build Apollo. 文件约定 The following table lists the conventions used in this document: icon 描述 胆大 焦点 Mono-space font 码, type The data Italic file, part and title of the title used in...


POJ 2689 Prime Distance

... The branch of mathematics called number theory is about properties of numbers. One of the areas that has captured the interest of number theoreticians for thousands of years is the question of primality. A prime number is a number that is has no proper factors (it is only evenly...


Based on OAS design, expandable OpenAPI

... Article source: Huawei Cloud API product team Huang Zeyi, please reprint the copyright. 前言 With the rise of the Internet industry, the development model has gradually been transformed into microservice autonomy: small teams develop microservices, and then call each other through the...


HBase entry detailed (3).md

... 环境: centos7+hadoop3.0.3+hbase2.0.1+jdk8 HBase MapReduce operation Note: * Map inherits TableMapper * Reduce inherits TableReducer * The type of value of the final Reduce output is Mutation * Set the relevant information through TableMapReduceUtil Instance: Statistics row key and add to...


Want to enter Google? Let's take a look at these interview questions.

... 谷歌, the US multinational technology company, is committed to Internet search, cloud computing, advertising technology and other fields, develop and provide a large number of Internet-based products and services. On June 8, 2016, "BrandZ Global Top 100 Most Valuable Brands 2016"...


Golang basics--gopkg.in/olivere/elastic.v5 learning one (environment configuration, link)

... 环境Configuration 环境dependence: Operating system: Mac Go:go1.11 ElasticSearch: 5.6.9 Java: 1.8 Elasticdump Elasticsearch-analysis-ik 6.3.2 Install elasticsearch @brew install [email protected] Install Configure elasticsearch environment variable admindeMBP:lab admin$ echo 'export PATH="...


How to play the micro-service

... 作者简介 黄朝兵, currently working for a multinational software company, as an expert development engineer. He has worked in Internet finance companies, large state-owned enterprises, Japanese companies, etc., and has served as technical manager, senior software development engineer, and...


Idea to play the tool class Jar package

... reproduced in: https://blog.csdn.net/hotdust/article/details/56277138?utm_source=copy (with map) 一, generated Jar without Manifest file (cannot directly execute Jar) 1, first open Project Structure (Command+;) and then select Artifacts on the left, then click the "+" sign above to...