Constraints

Storage space

The purchased storage space depends on the selected instance class.

You can enable storage autoscaling for your instance after the instance is created. Storage can autoscale to no more than 4 TB.

Tags

A maximum of 20 tags can be added for a DB instance.

For more information, see Managing Tags.

Free backup space

FlexusRDS provides free backup space of the same size as your purchased storage space.

After you pay for the storage space of your instance, you will get a backup space of the same size for free. For more information, see How Is FlexusRDS Backup Data Billed?

Retention period of automated backups

The default value is seven days and cannot be changed.

7-day retention can meet your requirements in most cases. If you want to retain backups for more than seven days, create manual backups.

Log retention period

• Error log details: 30 days
• Slow query log details: 7 days

For more information, see Logs.

Instance name

• 4 to 64 characters long
• Must start with a letter. Only letters (case sensitive), digits, hyphens (-), underscores (_), and periods (.) are allowed.

Backup name

• Must be 4 to 64 characters long.
• Must start with a letter. Only letters (case sensitive), digits, hyphens (-), and underscores (_) are allowed.

root permissions

Only the administrator account root is provided on the instance creation page. For details about the supported permissions, see root Permissions.

root password

• 8 to 32 characters long
• Must contain at least three types of the following characters: uppercase letters, lowercase letters, digits, and special characters (~ ! @ # $ % ^ * - _ = + ? , ( ) & . | ).

For more information, see Resetting the Administrator Password.

Database port

3306

System account

To provide O&M services, the system automatically creates system accounts when you create FlexusRDS instances. These system accounts are unavailable to you.

• rdsAdmin: a management account with the highest permission. It is used to query and modify instance information, rectify faults, migrate data, and restore data.
• rdsRepl: a replication account, used to synchronize data from the primary instance to the standby instance.
• rdsBackup: a backup account, used for backend backup.
• rdsMetric: a metric monitoring account used by watchdog to collect database status data.

Storage engine

Only the InnoDB storage engine is supported.

Instance deployment

Cloud servers where DB instances are deployed are not directly visible to you. You can only access the DB instances through IP addresses and database ports.

Data migration

Data Replication Service (DRS) can be used to migrate data. It is easy to use and can complete a migration task in minutes. DRS facilitates data transfer between databases, helping you reduce DBA labor costs and hardware costs.

Primary/Standby replication

FlexusRDS uses a primary/standby dual-node replication cluster. You do not need to set up replication additionally. The standby instance is not visible to you and therefore you cannot access it directly.

Rebooting a DB instance

FlexusRDS instances cannot be rebooted through commands. They must be rebooted on the management console.

Viewing backups

You can download automated and manual backups for local storage. To download a backup, you can use OBS Browser+, the current browser, or the download URL.

For more information, see Downloading a Full Backup.

Log management

• Logging is enabled by default and cannot be disabled.
• Binary logging is enabled by default.

Select

Table

Query permissions

Yes

Insert

Table

Insert permissions

Update

Table

Update permissions

Delete

Table

Delete permissions

Create

Database, table, or index

Permissions of creating databases, tables, or indexes

Drop

Database or table

Permissions of deleting databases or tables

Reload

Server management

Permissions of running the following commands: flush-hosts, flush-logs, flush-privileges, flush-status, flush-tables, flush-threads, refresh, and reload

Process

Server management

Permissions of viewing processes

Grant

Database, table, or stored program

Permissions of granting access control

References

Database or table

Foreign key operation permissions

Index

Table

Index permissions

Alter

Table

Permissions of altering tables, such as adding fields or indexes

Show_db

Server management

Permissions of viewing database connections

Create_tmp_table

Server management

Permissions of creating temporary tables

Lock_tables

Server management

Permissions of locking tables

Execute

Stored procedure

Permissions of executing storage procedures

Repl_slave

Server management

Replication permissions

Repl_client

Server management

Replication permissions

Create_view

View

Permissions of creating views

Show_view

View

Permissions of viewing views

Create_routine

Stored procedure

Permissions of creating storage procedures

Alter_routine

Stored procedure

Permissions of altering storage procedures

Create_user

Server management

Permissions of creating users

Event

Database

Event triggers

Trigger

Database

Triggers

Super

Server management

Permissions of killing threads

No

File

File on the server

Permissions of accessing files on database server nodes

No

Shutdown

Server management

Permissions of shutting down databases

Create_tablespace

Server management

Permissions of creating tablespaces