Database Instance Type

Last updated: 2019-11-18 17:57:42

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A database instance is a standalone database environment running in Tencent Cloud. It can contain multiple user-created databases and can be accessed using the same tools and applications as those for a standalone database instance. There are three types of instances available in TencentDB for MySQL.

Instance Type Definition Architecture Visible in the Instance List Function
Master instance An instance that can be read from and written to Basic edition and High availability edition Yes A master instance can mount read-only instances and disaster recovery instances for read/write separation and remote disaster recovery
Read-only instance An instance that can only be read from Single-node high-IO edition Yes A read-only instance cannot exist on its own; instead, it must be affiliated to a master instance. Its data comes solely from sync with the master instance. Besides, it must reside in the same region as the master instance
Disaster recovery instance An instance that enables disaster recovery across AZs and regions High availability edition Yes A disaster recovery instance is read-only during sync with a master instance. It can actively stop the sync and be promoted to a master instance for read/write access. It must reside in a different region as the master instance