Backup Storage
Backup storage is the underlying storage resource used for the persistent storage of backups such as database data or logs.
DBA
Database administrator.
Read-Write Separation
Read/write splitting directs transactional INSERT, UPDATE, and DELETE operations to the primary database, while SELECT queries are handled by read-only instances.
High reliability
High reliability typically describes a system that is specifically designed to reduce downtime and maintain high availability of its services.
Relational Database
A relational database is a database that is organized and linked according to a relational data structure. The relational database model reduces complex data structures to simple binary relationships (that is, two-dimensional table forms).
In a relational database, operations on data are almost entirely based on one or more relational tables. Database management is achieved by classifying, merging, joining, or selecting these related tables. Common relational databases include: Oracle Database, MySQL Database, MariaDB Database, SQL Server Database, Access Database, DB2, PostgreSQL, Informix, Sybase, and so on.
Cold backup
A cold backup refers to a backup performed while the system is shut down or in maintenance mode. In this scenario, the backed-up data completely aligns with the data in the system during that period.
Logical backup
Logical backup refers to the process of extracting data from a database using SQL and storing it in a binary file. In a logical backup, software technology is used to export data from the database and write it to an output file. The format of this file typically differs from the original database's file format, serving only as an image of the data content from the original database. Consequently, logical backup files can only be used for logical recovery of the database, that is, data import, and cannot be used for physical recovery based on the original storage characteristics of the database. Logical backup is generally used for incremental backup, which backs up data that has changed since the last backup.
Hot backup
A hot backup refers to a backup performed while the system is operating normally. In this scenario, because data in the system may be updated at any time, the backed-up data may exhibit some lag relative to the system's actual data.
Data Replication
Data replication refers to the process of copying data from the primary database to the secondary database. Replication modes include strong synchronous replication, semi-synchronous replication, and asynchronous replication.
Database Storage
Database storage is the underlying storage resource used for the persistent storage of database data and logs.
Database administrator
A database administrator (DBA) is a person responsible for managing databases. A DBA uses specialized software to store and organize data. This role may include capacity planning, installation, configuration, database design, migration, performance monitoring, security, troubleshooting, as well as backup and data recovery.
Number of Database Connections
Database connections refer to the number of client sessions connected to a database instance.
Database Migration
Database migration refers to the process of moving a database from one environment to another along with its application business. Examples include migrating from an on-premises IDC to the cloud, or from one cloud to another.
Database Instance
A database instance is an independent database environment that runs in the cloud. A database instance is a standalone database environment running in the cloud as the basic data block in TencentDB, which can contain multiple databases created by database users and can be accessed using the same client tools and applications as those for a standalone database instance.
Database Engine
A database engine is a core service used to store, process, and protect data. It allows for control over access permissions and rapid transaction processing, thereby meeting the requirements of most applications within an enterprise that need to handle large volumes of data. Each database instance supports a database engine.
Physical backup
A physical backup is a backup process that involves copying the actual operating system files that constitute a database from one location to another, typically from disk to tape. Physical backup is further categorized into cold backup and hot backup.
TencentDB for MySQL
TencentDB for MySQL is a high-performance distributed data storage service professionally built by Tencent Cloud based on the open-source MySQL database. It enables users to set up, operate, and scale relational databases in the cloud more easily.