Programmer Group

1, Release confirmation principle         The producer sets the channel to confirm mode. Once the channel enters the confirm mode, all messages published on the channel will be assigned a unique ID (starting from 1). Once the message is delivered to all matching queues, the broker will send a confirmation to ...

catalogue Application scenario: Basic principle: Implementation method 1: Using redis as distributed lock Implementation mode 2: Using redistribution as a distributed lock Application scenario: In current distributed applications, there are often scenarios where high concurrent traffic accesses db. In order to prevent the database from ...

catalogue 1. General 2. Other usage of hystrix service degradation 3. Hytrix realizes fusing 4. Overview 5. official account 1. General As the old saying goes: only by controlling your emotions can you control your life. Impulse is the devil, calm is the most important. To get back to business, I talked about how to add a degradation ...

High Availability HA (High Availability) is one of the factors that must be considered in the architecture design of distributed systems. It usually refers to reducing the time when the system cannot provide services through design. Assuming that the system can always provide services, we say that the availability of the system is 100%. If the ...

The most used go client of kafka should be sarama, but the old version of sarama did not support the consumption mode of consumer groups, so most people use sarama cluster. Later, sarama supported the consumption mode of consumer groups, and sarama cluster stopped maintenance. However, there are few online analysis of sarama consumer groups, a ...

preface With the deepening of current technology and the increasing number of services, it is not only a large amount of data and a large number of users, but also prone to high concurrency. So distributed systems are slowly emerging. This distributed system is mainly to split a complete system into micro services, so that each service is smal ...

Preface Share a complete set-up tutorial of Ali's Distributed Transaction Framework Seata. I feel that this tutorial is rather detailed. Basically every necessary dependency and configuration item is clear and clear. In order to make it easier for everyone to get started, the registry and micro-service frameworks use Ali system, Nacos and Dubb ...

Introduction to Apscheduler Apscheduler is a relatively easy-to-use timing task framework in python. You can refer to the introduction and api Official documents Concept description Job task: defines the functions executed by scheduled tasks, function parameters, and task execution related configurations.Trigger: defines the trigger meth ...

Project resource requirements   VMVare15 resource link: https://pan.baidu.com/s/1cVzeKjqu0Cmp4qMRDbFx8Q Extraction code: tdn4   CentOS7 image file link: https://pan.baidu.com/s/14QyfiXYYObdynswJlOoI1g Extraction code: 6cxp   oracle11 Linux version link: https://pan.baidu.com/s/16hWmzGudLjUEpkRzHAOGZw Extraction code: y34w &e ...

1. General I talked about the installation of Elasticsearch before. Today, let's talk about the basic use of Elasticsearch. two   Use of Elasticsearch index The index is equivalent to a table in mysql. 2.1 index creation 1) Head plug-in mode Select the index tab, click [new index], enter the index name, number of slices and num ...