Summary of Spring Boot actual combat project

Summary of Spring Boot actual combat project (1) Project design ideas (steps) Development environment construction and log git common commands Learning methods List of projects available for reference 1, Project design ideas (steps) 1. Analysis function: what are the functions and application scena ...

Posted by Paingiver on Tue, 25 Feb 2020 19:01:18 -0800

CentOS 7 deployment million pv projects (high availability Architecture)

PV introduction PV (Page View) is the number of clicks. Generally speaking, PV is the main indicator to measure a network news channel or website or even a network news. PV's explanation is as follows: a visitor looks at several pages of the website in 24 hours (0:00-23:00). It should be noted that the same person browsing the same page of th ...

Posted by mars16 on Tue, 25 Feb 2020 02:44:51 -0800

[architect] cache breakdown - recurrence, principle, analysis, solution

Table of contents structure of this article Scenario description Using code replication to solve the problem step by step Repetition problem Thinking about expanding problems Scenario description A product line is too laggy around January (end users 5W or so). When a customer manager feedback to ...

Posted by kaen on Tue, 25 Feb 2020 00:10:34 -0800

Resolve page refresh redux data loss issue.

concept For the current common "one-page application", the advantage is that the front-end can handle more complex data models in a more comfortable way, while transforming based on the data model for better interaction. Behind good interaction is a model that corresponds to the state of a page component, which is arbitrarily called ...

Posted by joad on Mon, 24 Feb 2020 19:03:00 -0800

Zero basic entry deep learning: LeNet and AlexNet of image classification task

Course name | zero basic entry-level in-depth learning Lecturer: Sun Gaofeng, senior R & D Engineer of Baidu deep learning technology platform Department Teaching time: 20:00-21:00 on Tuesday and Thursday 01 reading guidance This course is Baidu's official zero basic in-depth learning course. It is mainly for students who have no in-dept ...

Posted by Supplement on Mon, 24 Feb 2020 07:09:05 -0800

MySQL master slave -- data verification

Article directory 4. PT table checksum to verify master-slave data 4.0 references and installation 4.1. Pt table checksum verification principle 4.2 notes and common parameters 4.2.1 precautions 4.2.2 description of common parameters 4.3 best practices 4.4 troubleshooting of common problems 4.4.1, ...

Posted by paran0id Dan on Sun, 23 Feb 2020 02:12:25 -0800

A global unique id algorithm of 1 million generated per second by self-study

background The System tps is 3000, distributed deployment is adopted, and the business order number needs to be globally unique, such as order number. There are many common distributed global id schemes on the Internet, including the following: UUID redis atomic self increasing zookeeper node directo ...

Posted by Bleej on Sun, 23 Feb 2020 02:06:09 -0800

persepolis in open source code learning [2]

  1, Download Interface   1. Main interface download display MainWindow first initializes aria and starts aria2. The startup method is in download.py.  # start aria2         start_aria = StartAria2Thread()         self.threadPool.append(start_aria)         self.threadPool[0].start()         sel ...

Posted by 0riole on Sun, 23 Feb 2020 00:38:50 -0800

Query the bank teller's records of handling business within half an hour

Find out the bank teller's account opening records within half an hour. See if there are 3 or more accounts opened within half an hour. A table is given, in which is the operation record of a teller. The structure of the table records is as follows: field data type Cid (customer id) int Ctime (t ...

Posted by davidska on Sat, 22 Feb 2020 23:32:13 -0800

14. The use of listener in SpringBoot

1.1 introduction to monitor What is a web listener? A web listener is a special class in a Servlet that helps developers listen to specific events in the web, such as ServletContext, Httpsession, creation and destruction of ServletRequest, creation, destruction and modification of variables can be added before and after certain actions to real ...

Posted by avario on Sat, 22 Feb 2020 21:52:50 -0800