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 four types of instances available in TencentDB for MariaDB.
|Master instance||An instance that can be read from and written to||A master instance can mount disaster recovery instances for remote disaster recovery|
|Master instance (dedicated)||A master instance in dedicated cluster database mode||It is a database instance applied for in a dedicated cluster and has all features of a TencentDB master instance|
|Disaster recovery instance||An instance that enables disaster recovery across AZs and regions||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 region different from the master instance|
|Temp instance||A temporary instance generated by rollback||It is used to verify data after rollback. You can promote a verified temp instance to master instance by using the feature of switching to master instance|