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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11349

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Shangxuetang MySQL video tutorial

Course Advanced 17653

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Band of Brothers front-end example display video tutorial

Course Advanced 11361

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

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Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

2023-09-05 11:18:47

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: .right-menu{...grid-auto-flow:columndense;...} If I remove the grid-auto-flow attribute, the overflow stops. However, the items are now stacked into multiple rows, which is not what I want. I also tried converting .ri

2023-09-05 15:18:28

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

2023-09-05 15:06:32

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in php any value has a unique string representation (such as the php code itself). I post this question to speed up the design process of this program. Some values are easily converted to strings: numbers, booleans, etc. Some are not easy: objects, arrays, resources. I think the transfer object and

2023-09-05 15:34:44

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Collection data types in Apache Cassandra

Course Introduction：We will check out the Cassandra collection data type tutorial in our Cassandra journey. In this article, we will learn about Cassandra’s Collection data type. These data types have the same meaning as arrays and structures in C, C++, etc. Additionally, we will discuss Cassandra collection data types using lists, sets, and maps. So, let's start with the Cassandra collection data type. Collection Data Types of Cassandra In Cassandra, a collection data type is essentially a storage container for multiple values. Typically, Cassandra-CQL collection data types are defined by a single variable. The variable itself has a range of values. list

2023-08-25 comment 0 1006

Integration of PHP and Cassandra

Course Introduction：With the advent of the big data era and the increasing amount of data growth, Cassandra has become a popular distributed database technology. As one of the most popular Web programming languages, PHP language is one of the mainstream technologies in the field of Web development. How to seamlessly integrate PHP and Cassandra? Installing Cassandra Before you start using Cassandra, you need to install Cassandra. Cassandra can be downloaded to the latest version from the official website

2023-05-15 comment 0 848

Learn about Cassandra caching technology

Course Introduction：Cassandra is a high-performance, distributed NoSQL database that is widely used in large-scale data management. Cassandra's caching technology is one of the keys to its high performance. This article will introduce the basic principles, cache types and optimization methods of Cassandra caching technology. 1. Principle of Cassandra caching technology Cassandra's cache is a technology that stores frequently accessed data in memory to improve read performance. Cassan

2023-06-20 comment 0 1171

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