Analysis of gh-ost Principle

gh-ost principle Introduction The last article introduced gh-ost parameters and specific methods of use, as well as the core features - dynamic adjustable pause, dynamic modification parameters and so on. This paper explains gh-ost's execution process, data migration and handover details design from the source code. Two principle 2.1 Implementa ...

Posted on Fri, 20 Sep 2019 02:08:10 -0700 by hehachris

Customs Import and Export Verification Code Learning

This website's anti-crawl is relatively elementary, there is a sliding authentication code on the page, but there is no js encryption anti-crawl and other things, so only need to identify the location of the gap in the authentication code picture, return to the server in the form of Post parameters, you ...

Posted on Thu, 19 Sep 2019 20:27:31 -0700 by akkad

Realization of User Registration Function 3

Realization of User Registration Function 3 Objective: 1. Photo Verification Code Verification 2. Realization of Short Message Verification Code Verification Function Applied technology: 1. Front-end: js (jQuery framework), Ajax (front-end and back-end interaction), and 2. Backend: django interface de ...

Posted on Thu, 19 Sep 2019 04:01:35 -0700 by seenu_vas80

Web Clustering Using Haproxy

1. Overview of casesHaproxy is a popular cluster scheduling tool at present. There are many scheduling tools of the same kind, such as LVS and Nginx.Compared with LVS, LVS has the best performance but is relatively complex to build; Nginx's upstream module supports clustering, but it does not have a strong cluster node health check function an ...

Posted on Wed, 18 Sep 2019 13:10:54 -0700 by piet

Analysis of gh-ost Principle

Author's Profile: Yang Qilong, a 7-year veteran of DBA, is currently working in Hangzhou Youzan Technology DBA. He is mainly responsible for database architecture design and operation and maintenance platform development. He is good at database performance tuning and fault diagnosis. I. Introduction Last article (gh-ost online ddl change tool ...

Posted on Wed, 18 Sep 2019 02:51:33 -0700 by spiffy577

Django project: 3. User login and logout function

User login and logout function I. Functional Requirement Analysis 1. Login and Exit Function Analysis Flow chart         function Login page Login function Exit function II. Login Page 1. Interface design Interface specification Category Explain Request method GET url definition /user/login/ ...

Posted on Tue, 17 Sep 2019 07:30:56 -0700 by steve55

Tensorboard visualization, data form of Tensorboard, view data when the network is running

1.Tensorboard can record and display the following data forms: Scalar Scalars Picture Images Audio Audio Computational Graph Distribution of data distribution Histograms Embedding Vectors 2. Visualization of Tensorboard The first thing to do i ...

Posted on Sat, 14 Sep 2019 07:09:37 -0700 by mysterio2099

Path to kafka in-depth research - The zk configuration of the kafka and zookeeper profiles in detail

Catalog1/Zookeeper Profile Details2/kafka Profile Parameters Detailed3/Production environment zk and kafka profile notes4/kafka command details 1/Complete installing zookeeper to detail its configuration file zookeeper-3.4.14.tar.gzWhen installing zookeeper we are going to modify the file zoo_sample.cfg under the conf directory for zookeeper p ...

Posted on Wed, 11 Sep 2019 10:14:28 -0700 by xploita

[Java] Java AIO use

Welcome to the public number nullobject.The article was first published on a personal blog https://www.nullobject.cn The public nullobject is updated synchronously. This article mainly introduces Java AIO network programming. 1. What is AIO AIO in this article refers specifically to AIO in Java environment. AIO is a kind of IO model in java. As ...

Posted on Wed, 11 Sep 2019 04:23:10 -0700 by radstorm

java selenium div embedded scrollbar page long screenshot to send mail

java selenium web page embedded scrollbar screenshot to send mail Main problems Let's start with the following Because the company requires an interface, requesting this interface for web page screenshots and sending mail function, originally w ...

Posted on Wed, 11 Sep 2019 01:35:17 -0700 by js_280