Tag：fault
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Time：2021-10-9
In redis’s Master-Slave replication mode, once the master node fails to provide services due to failure, it is necessary to manually promote the slave node to the master node, and notify the application party to update the master node address. This failure handling method is unacceptable for many application scenarios. Redis has officially provided the […]
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Time：2021-9-30
Summary of online problems caused by small program user information disorder caused by CDN cache Problem description In a small program, the high-frequency request scenario will lead to serial numbers after the user logs in, that is, my own account logs in and displays other people’s information. The problem seriously affects the online user experience. […]
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Time：2021-9-29
Introduction:As an architecture model, cloud native architecture controls the application architecture through several principles. These principles can help technical directors and architects to be more efficient and accurate in technology selection. This paper will introduce these principles in detail. As an architecture model, cloud native architecture controls the application architecture through several principles. These principles […]
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Time：2021-9-25
Summary: for programmers, I always believe that code is the key to presentation ability. It is easy to see the difference between the code written by an excellent programmer and the code written by an ordinary programmer. The code is a business card to show the programmer’s hard power. How to improve my ability to […]
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Time：2021-9-15
Introduction: for programmers, I always think that code is the key to show their ability. It is easy to see the difference between the code written by an excellent programmer and the code written by an ordinary programmer. As the display of programmers’ hard power and business card, how to improve their ability to write […]
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Time：2021-9-15
Source code of this article:GitHub · click here || Gitee · point here 1、 Distributed fault The architecture and business development of distributed systems are relatively easy to handle under good ideas and design document specifications. The relative here refers to the sudden failure of the production environment under the distributed architecture. In the actual […]
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Time：2021-9-8
Cloud native enabling digital transformation The latest white paper on the development of China’s digital economy shows that the scale of China’s digital economy will expand to 39.2 trillion yuan in 2020, which has become an important driving force for the national economy. All walks of life are vigorously promoting “digital transformation”, which has become […]
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Time：2021-8-27
Due to the possibility of accidents such as machine failure, the high availability of database has always attracted much attention. As a NoSQL database, tcallusdb provides scalability and high availability in cross data center scenarios. The purpose of this document is to introduce the deployment scheme of tcallusdb in the same city’s dual data centers. […]
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Time：2021-8-24
Apache Kafka is an open source distributed messaging platform that delivers data with high throughput and low latency. In terms of scale, it can process trillions of records every day, while providing fault tolerance, replication and automatic disaster recovery.Although Kafka has many different usage scenarios, the most common is as a message broker between applications. […]
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Time：2021-8-23
1. Implementation of raid Interaction: do we do hardware raid before or after installing the system? A: the system is installed only after the array is made. Generally, when the server is started, there is a prompt to enter the configuration of Riad, such as pressingCTRL + L / h / m to enter the […]
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Time：2021-8-21
MHA (Master HA) is an open source MySQL high availability program. It provides the automatic master failover function for MySQL master-slave replication architecture. When MHA monitors a master node failure, it will promote the slave node with the latest data to become a new master node. During this period, MHA will avoid consistency problems by […]
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Time：2021-8-15
Memory model Memory partition Data itself The memory required by the redis process to run itself buffer Memory fragmentation Storage details data model Dicentry: each key value pair will have a dicentry. Key: redis key, which is stored in SDS format Redisobject: redis value, which is stored in the format of redisobject. jemalloc Redis is […]
