Instance count. Default value is 1, minimum value 1, maximum value 100.

Instance memory size. Unit: MB. Please use the obtain the purchasable specifications of cloud databases API to obtain creatable memory specifications.

Instance disk size, unit: GB. Please use the obtain the purchasable specifications of cloud databases API to get the creatable disk range.

MySQL version, including 5.5, 5.6, 5.7, and 8.0. Please use the obtain the purchasable specifications of cloud databases API to get the instance version created.
Note: When creating a non-cloud disk edition instance, specify the instance version as needed (recommend 5.7 or 8.0). If this parameter is left blank, the default value is 8.0. If creating a cloud disk edition instance, this parameter can only be set to 5.7 or 8.0.

VPC ID. Please use Querying VPC List.
Description: If you create a cloud disk edition instance, this item is required and must be VPC type. If this item is left blank, the system will select the default VPC by default.

Subnet ID in the private network. If UniqVpcId is set up, UniqSubnetId is required. Please use query subnet list.
Description: If this item is not filled, the system will select the default subnet in the Default VPC.

For availability zone information, please use the obtain the purchasable specifications of cloud databases API to get the availability zones where instances can be created.

If you create a single-node, two-node, three-node, or four-node instance, this parameter is required. Please specify an availability zone. If you do not specify one, the system will automatically select an availability zone (which may not be the one you want to deploy in). If you create a cloud disk edition instance, leave this parameter blank and configure the availability zones for read-write nodes and read-only nodes with parameter ClusterTopology.

Instance ID, required when you purchase a read-only instance or disaster recovery instance. This field represents the primary instance ID of the read-only instance or disaster recovery instance. Please use the Query Instance List API to query the cloud database instance ID.

Instance type. Supported values include: master - primary instance, dr - disaster recovery instance, ro - read-only instance.
Description: Select instance type. master is selected by default if left blank.

Region of the primary instance. This field is required when you purchase a disaster recovery or RO instance.

Custom port. Supported range: [1024-65535].
Description: If left blank, it defaults to 3306.

Set the root account password. The password must contain 8 to 64 characters and at least two of the following: letters, digits, or characters (supported characters: _+-&=!@#$%^*()). You can specify this parameter when purchasing a primary instance. This parameter is invalid when purchasing a read-only instance or disaster recovery instance.

Parameter list. The parameter format is ParamList.0.Name=auto_increment&ParamList.0.Value=1.

Query the configurable parameters by referring to querying the default configurable parameter list.
Note: table Name case sensitivity can be enabled or disabled with the parameter lower_case_table_names. a parameter Value of 0 means enabling, and a Value of 1 means disabling. If not set, the default Value is 0. If you create a MySQL 8.0 edition instance, you need to set the lower_case_table_names parameter when creating the instance to enable or disable table Name case sensitivity. After the instance is created, the parameter cannot be modified, meaning table Name case sensitivity cannot be changed once created. Instances of other database versions support modifying the lower_case_table_names parameter after creation. For the function invocation method to set table Name case sensitivity when creating an instance, please see examples in this document.

Data replication method, defaults to 0. Supported values include: 0 - means async replication, 1 - means semi-sync replication, 2 - means strong sync replication. You can specify this parameter when purchasing a primary instance. This parameter is invalid when purchasing a read-only instance or disaster recovery instance.

Multiple Availability Zones, defaults to 0. Supported values include: 0 - means single availability zone, 1 - means multi-availability zone. Specify this parameter when purchasing the primary instance. This parameter is invalid when purchasing a read-only instance or disaster recovery instance.

AZ information of standby database 1.

For two-node, three-node, or four-node instances, specify this parameter. If not specified, it defaults to the Zone value. For cloud disk edition instances, this parameter is optional. Configure the AZ for read-write and read-only nodes with parameter ClusterTopology. Single-node instances are in a single availability zone, so no need to specify this parameter.

AZ information of standby 2, empty by default.

Specify this parameter when you proceed to purchase a three-node primary instance or a four-node primary instance.

Security group parameters. Use the API Query Project Security Group Information to query security group details of a certain project.

Read-only instance information. This parameter is required when you purchase a read-only instance.

This field is meaningless for pay-as-you-go instances.

Instance name. When you purchase multiple instances only once, suffix numbers are used for case-sensitive instance naming. For example, instanceName=db and goodsNum=3, the instance names are db1, db2, and db3 respectively.

Tag information of the instance.

Placement group ID.

String used to ensure request idempotency. This string is generated by the customer and must be unique between different requests within 48 hours, with a maximum value of 64 ASCII characters. If not specified, request idempotency cannot be guaranteed.

Instance isolation type. Supported values include: "UNIVERSAL" - general-purpose instance, "EXCLUSIVE" - dedicated instance, "BASIC_V2" - ONTKE single-node instance, "CLOUD_NATIVE_CLUSTER" - CLOUD disk edition standard type, "CLOUD_NATIVE_CLUSTER_EXCLUSIVE" - CLOUD disk edition enhanced. If not specified, it defaults to general-purpose instance.
Description: If a CLOUD disk edition instance is created, this parameter is required.

Parameter template ID.
Remark: If you use a custom parameter template ID, you can input the custom parameter template ID. If you plan to use the default parameter template, the input ID is invalid and you need to set ParamTemplateType.

Array of alarm policy IDs. OriginId returned by the Tencent Cloud observability platform DescribeAlarmPolicy API.

Number of instance nodes.

For RO and basic edition instances, the value defaults to 1. To purchase a three-node instance, set this value to 3 or specify the BackupZone parameter. When purchasing a primary instance without specifying this parameter or the BackupZone parameter, the default value is 2, which means purchasing a dual-node instance. To purchase a four-node instance, set this value to 4 or specify the FourthZone parameter.

Number of Cpu cores of the instance.

When multiple Cpu configurations exist for the Memory specification (for example, 64000MB Memory corresponds to 8-core/16-core/32-core), the Cpu parameter must be provided.

Whether to automatically initiate disaster recovery sync. This parameter only takes effect when purchasing a disaster recovery instance. Available values are: 0 - Do not automatically initiate disaster recovery sync; 1 - Automatically initiate disaster recovery sync. The default is 0.

Financial Enclosure ID.

Default parameter template type. Supported values include "HIGH_STABILITY" - HIGH-STABILITY template, "HIGH_PERFORMANCE" - HIGH-PERFORMANCE template. Default value is "HIGH_STABILITY".
Remark: If you need to use the cloud database MySQL default parameter template, set up ParamTemplateType.

Alarm policy name array, such as ["policy-uyoee9wg"]. This parameter is invalid when AlarmPolicyList is not empty.

Whether to only pre-check this request. true: Send a check request without creating an instance. Check items include required parameters, request format, and service limits. If the check fails, return the corresponding error code; if the check passes, return RequestId. Default false: Send a normal request and create the instance directly after passing the check.

Instance engine type, defaults to "InnoDB". Supported values include "InnoDB" and "RocksDB".

Specify the IP list of the instance. Only the primary instance is supported. Process by instance sequence. Handle as unspecified if insufficient.

The data protection space size of the cloud disk edition instance, in GB, has a setting range of 1 - 10.

Topology configuration for cloud disk edition nodes.
Description: If a cloud disk edition instance is purchased, this parameter is required. Set the topology for RW and RO nodes of the cloud disk edition instance. The node scope for RO nodes is 1-5. Set at least 1 RO node.

Disk type. This parameter can be specified for single-node (cloud disk) or cloud disk edition instances. CLOUD_SSD means SSD Cloud Block Storage, CLOUD_HSSD means enhanced SSD cloud disk, and CLOUD_PREMIUM means high-performance cloud block storage.
Note: The supported regions for disk types of single-node (cloud disk) and cloud disk edition instances vary slightly. For specific support situation, refer to Regions and Availability Zones.

ClusterType: cage—Financial Enclosure, cdc—CDB ON CDC; dedicate—dedicated cluster

Turn on or off instance destruction protection. on - turn on, off - turn off.

AZ information of standby 3, empty by default. Specify this parameter when you proceed to purchase a four-node primary instance.

Short order ID.

Instance ID list.