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introduce Kafka was originally developed by Linkedin company. It is a distributed, partition and multi replica based on zookeeper protocol The biggest feature of the distributed messaging system is that it can process a large amount of data in real time to meet various demand scenarios: for example, the batch processing system based on ...

1. List Redis list is a simple string list, sorted by insertion order. You can add an element to the head (left) or tail (right) of the list A list can contain up to 2 ^ 32 - 1 elements (4294967295, with more than 4 billion elements per list). Collection members are * * not unique, * * which means that duplicate data can appear in the collect ...

Install redis6.2 and enable TLS encryption install # Install dependent software sudo apt update sudo apt install make gcc libssl-dev pkg-config # Download redis and decompress wget https://download.redis.io/releases/redis-6.2.6.tar.gz tar -xvf redis-6.2.6.tar.gz # compile cd redis-6.2.6 make BUILD_TLS=yes # If there is an error during c ...

1. Brief introduction of the system Using C++ language, this paper designs and implements an inbound and outbound commodity management system suitable for supermarkets, which implements functions such as commodity purchase, sales, commodity classification, revenue management, order management, administrator and so on. 2. Systematic Hierarch ...

1. Introduction to Oracle CDC CDC(Change Data Capture). Many people believe that as long as it involves database data replication and incremental data extraction, it is necessary to buy charging software. In fact, we can also realize database data replication and incremental data extraction through free tools such as CDC and LogMiner prov ...

Link to the above: (if you don't know much about Spring integration Redis, please refer to) Spring integration Redis introduction details and basic exercises_ Yang Daxian loves basketball - CSDN blog This article only does functional testing to show the code logic, and will be released later on how to use it in the project. Shopping ca ...

1. Concept of gtid Global transaction id, one transaction of Gtid corresponds to one id, and during master-slave synchronization, the transaction id submitted on each master generates a unique transaction id when copied to the cluster.Instead of using master log file and master log POS to start replication, Gtid is used to replace the trad ...

Indexes 1.1 what does database index do? Database index is actually to make data query faster /*Check the important things and say them three times*/ 1.2 what are the database indexes? 1. Clustered index (primary key index). In the database, all rows will be sorted according to the primary key index 2. Non clustered index: index ordinary ...

TCL: transaction control language TCL(Transaction Control Language) 1, Business 1. Concept of services One or a group of sql statements form an execution unit, which either executes all or does not execute all 2. Transaction characteristics (ACID) Atomicity: a transaction can no longer be split, either all or none Consistency: the execution of ...

As the length of the last article is too long, I'll practice it alone. o by the way, it's better to use single quotation marks for the characters in mysql, otherwise an error may occur! Textbook exercises Suppose there is a database of students' course selection, which contains three relational patterns: student snosnamesexbirthspecialty201 ...