A TencentDB instance is a standalone database environment running in Tencent Cloud. It includes multiple databases created by users and can be accessed by using the same tools and applications as those for a standalone database instance.
There are two types of instances available in TencentDB for MySQL:
|Instance Type||Definition||Architecture||Visible in Instance List||Feature|
|Source instance||An instance that can be read from and written to||Yes||A source instance can mount read-only instances for read/write separation|
|Read-Only instance||An instance that can only be read from||Single-Node||Yes||A read-only instance cannot exist on its own. Instead, it must be affiliated to a source instance. Its data comes solely from syncing with the source instance, and it must reside in the same region as the source instance|