Step 1: Buy a DB Instance

Scenarios

This section describes how to buy a DB instance on the RDS console.

RDS for MariaDB only supports the pay-per-use billing mode. RDS allows you to tailor your compute resources and storage space to your business needs.

Procedure

1. Go to the Buy DB Instance page.
2. On the displayed page, select a billing mode, configure information about your DB instance, and click Next.
   • Billing mode: pay-per-use
   • Basic information
     Figure 1 Basic information
     

     Table 1 Basic information

     Parameter	Description
     Region	Region where your resources are located. NOTE: Products in different regions cannot communicate with each other through a private network. After a DB instance is created, the region cannot be changed. Therefore, exercise caution when selecting a region.
     DB Instance Name	Must start with a letter and consist of 4 to 64 characters. Only letters (case-sensitive), digits, hyphens (-), and underscores (_) are allowed.
     DB Engine	MariaDB
     DB Engine Version	The DB engine version differs in different regions.
     DB Instance Type	Primary/Standby: uses an HA architecture with a primary DB instance and a synchronous standby DB instance. It is suitable for production databases of large- and medium-sized enterprises in Internet, Internet of Things (IoT), retail e-commerce sales, logistics, gaming, and other sectors. The standby DB instance improves instance reliability and is invisible to you after being created. Single: uses a single-node architecture, which is more cost-effective than primary/standby DB instances. It is only recommended for development and testing of microsites, and small and medium enterprises, or for learning about RDS.
     AZ	An AZ is a physical region where resources use independent power supply and networks. AZs are physically isolated but interconnected through an internal network. You can deploy primary and standby instances in a single AZ or across AZs to achieve failover and high availability.
     Storage Type	Determines the DB instance read/write speed. The higher the maximum throughput is, the higher the DB instance read/write speed can be. Cloud SSD: cloud drives used to decouple storage from compute. The maximum throughput is 350 MB/s.
     Time Zone	You need to select a time zone for your instance based on the region hosting your instance. You can select a time zone during instance creation and change it later as needed.

   • Specifications and storage
     Figure 2 Specifications and storage
     

     Table 2 Specifications and storage

     Parameter	Description
     Instance Class	Refers to the vCPU and memory of a DB instance. Different instance classes have different numbers of database connections and different maximum IOPS.
     Storage Space (GB)	Contains the system overhead required for inodes, reserved blocks, and database operation.

   • Network and database configuration

     Table 3 Network

     Parameter	Description
     VPC	A virtual network in which your RDS DB instances are located. A VPC can isolate networks for different workloads. You can select an existing VPC or create a VPC. For details about how to create a VPC, see "Creating a VPC" in Virtual Private Cloud User Guide. If no VPC is available, RDS allocates a VPC to you by default. NOTICE: After a DB instance is created, the VPC cannot be changed.
     Subnet	Improves network security by providing dedicated network resources that are logically isolated from other networks. Subnets take effect only within an AZ. The Dynamic Host Configuration Protocol (DHCP) function is enabled by default for subnets in which you plan to create RDS DB instances and cannot be disabled. A floating IP address is automatically assigned when you create a DB instance. You can also enter an unused IPv4 floating IP address in the subnet CIDR block.
     Security Group	Enhances security by controlling access to RDS from other services. Ensure that the security group you select allows the client to access the DB instance. If no security group is available or has been created, RDS allocates a security group to you by default.

     Table 4 Database configuration

     Parameter	Description
     Administrator	The default login name for the database is root.
     Administrator Password	Must consist of 8 to 32 characters and contain the following character types: uppercase letters, lowercase letters, digits, and special characters (~!@#$%^*-_=+?,()&). Enter a strong password and periodically change it for security reasons. If the password you provide is regarded as a weak password by the system, you will be prompted to enter a stronger password. Keep this password secure. The system cannot retrieve it.
     Confirm Password	Must be the same as Administrator Password.
     Parameter Template	Contains engine configuration values that can be applied to one or more DB instances. If you intend to create a primary/standby DB pair, they use the same parameter template.
     Table Name	Specifies whether table names are case sensitive. NOTE: The case sensitivity of table names for created instances cannot be changed.
     Enterprise Project	If your account has been associated with an enterprise project, select the target project from the Enterprise Project drop-down list.

   • Tags

     Table 5 Tags

     Parameter	Description
     Tag	Tags an RDS DB instance. This parameter is optional. Adding tags to RDS DB instances helps you better identify and manage the DB instances. A maximum of 20 tags can be added for each DB instance.

   • Purchase period

     Table 6 Purchase period

     Parameter	Description
     Quantity	RDS supports DB instance creation in batches. If you choose to create primary/standby DB instances and set Quantity to 1, a primary DB instance and a standby DB instance will be created synchronously.

   

   • The performance of your DB instance depends on its configurations. Hardware configuration items include the instance specifications, storage type, and storage space.

3. Confirm the specifications.
   • If you need to modify your settings, click Previous.

4. To view and manage your DB instance, go to the Instances page.
   • When your DB instance is being created, the status is Creating. The status changes to Available after the instance is created. To view the detailed progress and result of the creation, go to the Task Center page.
   • The automated backup policy is enabled by default. You can change it after the DB instance is created. An automated full backup is immediately triggered once your DB instance is created.
   • After a DB instance is created, you can enter a description for it.
   • The default database port is 3306. You can change it after a DB instance is created.