A brief discussion on recovery technology and core architecture design

1. Four types of failures: transaction failure, system failure, media failure, computer virus 1. Transaction failure: Transaction internal failures can be divided into expected and unexpected failures, and most of them are unexpected. Expected internal transaction failures refer to internal transaction failures that can be discovered through the transaction program itself; unexpected internal transaction failures cannot be handled by the transaction program, such as operation overflow failures, concurrent transaction deadlock failures, and violations of certain integrity restrictions. resulting in malfunctions, etc. 2. System failure: System failure is also called a soft failure. It means that during the operation of the database, due to hardware failures, vulnerabilities in the database software and operating system, or sudden power outages, the system stops running and all running transactions are interrupted. A type of fault that terminates normally and requires a system restart. This type of transaction does not destroy the database, but affects all running transactions. 3. Media failure: Media failure is also called a hard failure, which mainly refers to a type of failure in which some or all of the data in the database is lost due to head collision, disk damage, strong magnetic interference, natural disasters and man-made disasters during the operation of the database. . 4. Computer virus failure: Computer virus failure is a malicious computer program that can reproduce and spread like a virus.

1. [MySQL 07] Database recovery technology

##Introduction: transaction failure, system failure, media failure, computer virus

2. Recovery Technology of MDF Files in SQL Server

Introduction: Recovery Technology of MDF Files in SQL Server

3. Enterprise-level Linux accidentally deleted data recovery technology

Introduction: For To better ensure data security, enterprise-level data is generally stored on storage devices of Linux and Unix kernel systems with higher security and stability. According to a well-known data recovery brand

4. PostgreSQL database backup and recovery technology comparison

Introduction: Although WAL archiving allows Restore any modifications made to the PostgreSQL database data. It will not restore modifications to the configuration files after the initial base backup (that is, p

5. SQL Server file recovery technology

#Introduction: SQL Server has two backup methods, one is to use BACKUP DATABASE to back up the database file, and the other is to directly copy the database file mdf and log file ldf. In this article, we will mainly introduce the backup and recovery of the latter. (This article assumes that you are already proficient in using Server Enterprise Manager and SQL Server query analysis. ##6. Easily master SQL Server database file recovery technology

Introduction: There are two ways to backup SQL Server database, one is to use BACKUP DATABASE Another way to back up the database file is to directly copy the database file mdf and log file ldf. This article will mainly discuss the backup and recovery of the latter. This article assumes that you are proficient in using SQL Server Enterprise Manager (SQL Ser).

【Related Q&A recommendations】:

The above is the detailed content of A brief discussion on recovery technology and core architecture design. For more information, please follow other related articles on the PHP Chinese website!