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Original address: https://mysqlserverteam.com/mysql-8-0-innodb-now-supports-instant-add-column/   For a long time, instant DDL has been one of the most popular InnoDB functions. For the growing and fast-growing data set, any network scale database must have the function of executing DDL immediately. Developers often need to add new columns to m ...

On Synergetic process   a collaboration is simply a more lightweight thread that is not managed by the operating system kernel and is completely controlled by the program (executed in user mode). A co program is interruptible within a subroutine, and then switches to other subroutines, returning when appropriate to continue execution. Ad ...

This article will focus on some common skills in the process of machine learning training with Python. Mastering them can make you get twice the result with half the effort. Most of the code used will be based on the last example in the previous article, which is to predict wages according to the conditions of farmers A kind of , if you haven' ...

Total Catalog Index: K8s Network Calico From Getting Started to Abandoning Series 1. Create Front End, Back End, Client and Manage User Interface Applications kubectl create -f https://docs.projectcalico.org/security/tutorials/kubernetes-policy-demo/manifests/00-namespace.yaml kubectl create -f https://docs.projectcalico.org/security/tutorial ...

1, Basic knowledge of Nginx 1. What is Nginx? Nginx is an open source, lightweight, high-performance HTTP server and reverse proxy server.It is characterized by less memory and strong concurrency. 2. What does Nginx do? It can be used as an HTTP server to access and publish websites.It can also be used as a reverse proxy server to achieve load ...

Open the source code directly, see that it is a file upload, check the file size and pass a Check() function judgment, and take a look at the Check() function function Check(){ $BlackExts = array("php"); $ext = explode(".", $_FILES["file"]["name"]); $exts = trim(end($ext)); $file_content = file_get_contents($_FILES["file"]["tmp ...

Modifying and listening IP address of oracle Reference and combine these two blogs Modifying and listening IP address of oracle Oracle modify listening IP address In a very simple way, the problem of monitoring is solved. Now let's combine and rearrange it 1. In cmd, enter hostname discovery hostname 2. Modify the ...

Get ready Basic python preparation: Fundamentals of pygame, refer to Eye Blog's "Write games with Python and Pygame - from getting started to mastering" Install python 3.8.0 to download on python's official website, not to mention more. Install pygame, command: pip install pygame If the installation is slow, you can change the pip so ...

Catalog What is ELKB Building ELKB system Problems to be noticed during construction What is ELKB ELKB is a popular solution for log system, which is composed by a set of components. This set of components are ElasticSearch, LogStash, Kibana and FileBeat. The functions of each component are as follows: Elastic search (es): Based on Apa ...

When we use https to make network requests, we will receive the certificates from the server. These certificates are divided into agency certificates and certificates issued by ourselves. In ios, if we are going to request an organization certified to send an https request, we don't need to process it. But if it is a self signed certificate, we ...