Instance Purchasing

Last updated:2026-01-12 19:10:10

Instance Purchasing

Last updated: 2026-01-12 19:10:10

Scenarios
You can refer to this article to purchase and configure your first TencentDB for Redis® instance. Tencent Cloud provides two purchase methods:
Console: You can configure instance parameters and place an order directly on the web page of the console.
API: You can create an instance by calling an API in the client program.
Purchase Preparations
You have registered a Tencent Cloud account and completed identity verification.
To register a Tencent Cloud account: click here.
To complete identity verification: click here.
Regions and availability zones (AZs) for the database instance have been planned. See Regions and AZs.
The specifications and performance required for the database instance have been planned. See Memory Edition (Standard Architecture) and Performance.
Virtual Private Cloud (VPC) and security group have been planned for the database instance. See Building Up an IPv4 VPC and Configuring Security Group.
To deploy instances across multiple AZs in the same region, you can first learn about the architecture of Multi-AZ Deployment.
To enable read/write separation, please first understand the implementation principles of Read/Write Separation.
You have understood the billing details for the database instance. See Billing Overview. When a pay-as-you-go database is created, one hour's database fee will be frozen. Please ensure sufficient balance in your account before purchasing.
Purchase in the Console
1. Log in with a Tencent Cloud account to the TencentDB for Redis purchase page.
2. See the parameter descriptions in the following table and select the instance configuration based on your actual requirements.
Parameter Name
Required or Not
Parameter Description
Billing Mode
Yes
Supported billing modes include yearly/monthly subscription and pay-as-you-go. For how to choose a billing mode, see Billing Overview.
Region
Yes
Select a region for the instance. You can select the nearest region to reduce access latency.
Once an instance is created successfully, the region cannot be changed. Please select the region with caution.
Please select the same region as the Cloud Virtual Machine (CVM) instance; otherwise, communication via the private network cannot be established directly.
Cloud products in different regions cannot communicate via the private network, and the region cannot be changed after purchase. Please select the region with caution. For example, a CVM instance in the Guangzhou region cannot access a Redis instance in the Shanghai region via the private network. If you need cross-region private network communication, see Cloud Connect Network.
Instance Edition
Yes
Redis Edition: a high-performance edition based on the open-source Redis storage engine.
Memcached Edition: an edition based on the Memcached storage engine.
ValKey Edition: an edition based on the ValKey storage engine.
Compatible Version
Yes
Redis Edition: compatible with Redis versions 7.0, 6.2, 5.0, 4.0, and 2.8. Redis version 2.8 is no longer available for purchase. We recommend version 4.0 or later. To purchase version 2.8, submit a ticket to apply.
Memcached Edition: compatible with Memcached protocol version 1.6.
ValKey Edition: compatible with ValKey version 8.0.
Architecture
Yes
Select a deployment architecture. For details, see Memory Edition (Standard Architecture) and Memory Edition (Cluster Architecture).
Redis Edition: Version 4.0 or later supports Standard Architecture and Cluster Architecture. Version 2.8 only supports Standard Architecture.
Memcached Edition: only supports Cluster Architecture.
ValKey Edition: supports Standard Architecture and Cluster Architecture.
Memory
Yes
When selecting Standard Architecture, you need to configure the required memory specifications in the range of 256 MB to 64 GB.
Replica Quantity
Yes
Select the number of database replicas.
Note:
Multiple replicas provide primary/secondary high availability and enhance data security. You can also scale read-only performance by using replicas.
The number of replicas in different regions or editions may vary. It is subject to the default settings in the console.
Shard Quantity
Yes
When selecting Cluster Architecture, you need to set the number of shards. Increasing the number of shards can enhance the cluster's storage capacity. Please select based on your needs.
Shard Capacity
Yes
When selecting Cluster Architecture, you need to set the capacity for each shard.
Specs Preview
-
Preview the currently selected specifications and the supported maximum number of connections and maximum network throughput to confirm whether they meet your expectations.
Note:
For newly purchased instances, the maximum network throughput here already includes the default additional bandwidth. The additional bandwidth for Standard Architecture is consistent with that of Cluster Architecture 1 shard.
Read-Only Replica
No
Select whether to enable the read/write separation feature. This feature is only supported by Redis Edition and is not currently available for Memcached Edition or ValKey Edition.
Enabling read/write separation routes write operations to the primary node and read operations to replica nodes. Data read from replica nodes will lag behind the primary node.
If you disable the feature when you purchase instances, you can enable it later based on actual business needs. For details, see Read/Write Separation.
Network
Yes
Supports only VPC.
AZ
Yes
Select whether to enable multi-AZ deployment. Both single-AZ and multi-AZ deployments are supported. Compared with single-AZ instances, multi-AZ instances offer higher availability and disaster recovery capabilities; see Multi-AZ Deployment.
For single-AZ deployment, you must specify an AZ for the primary node simultaneously.
For multi-AZ deployment, after selecting the master AZ, you must also assign an AZ to each replica from the dropdown list under Replica x, where x represents the replica number, such as Replica 1 and Replica 2.
IPv4 Network
Yes
Select the specific VPC and subnet. We recommend that you select the same VPC as your CVM instance in the same region.
A VPC has a region attribute (such as Guangzhou), while a subnet has an AZ attribute (such as Guangzhou Zone 1). A VPC can be divided into one or more subnets. Different subnets in the same VPC are communicable on the private network by default, and different VPCs (regardless of whether they are in the same region) are isolated on the private network by default.
After purchasing an instance, you can switch its VPC. For specific operations, see Switching VPCs. You can also click Create VPCs and Create Subnets to rebuild the required network environment. For specific operations, see Creating VPC.
Port
Yes
Custom port number in the value range of [1024,65535]. The network port can be modified after the instance is purchased.
Redis Edition: The default port number is 6379.
Memcached Edition: The default port number is 11211.
ValKey Edition: The default port number is 6379.
Parameter Template
No
Select the Redis Edition-related parameter template. Memcached Edition and ValKey Edition do not support selecting parameter templates.
The system automatically adapts the corresponding default template based on the selected compatible version and architecture, and configures parameter attributes for instances in batches. For details about parameter templates, see the default system templates in Managing Parameter Templates.
If you want to create a template, click Create Parameter Template. For specific operations, see Managing Parameter Templates.
Project
Yes
Assign the corresponding project to the instance in the dropdown list. You can manage the instance by project.
By default, the project is Default Project.
Click Create Project on the Project Management page, where you can customize the project name to manage cloud resources.
Tag
No
Set a tag to the instance. You can manage the instance by tag. Click Add to select the tag key and value.
Security Group
Yes
Configure security group rules for the instance to control inbound traffic to the database.
You can select an existing security group in the Please select dropdown list, or click Custom Security Groups to set new inbound rules for a security group. For details, see Configuring Security Group.
After selecting a security group in the dropdown list, click Preview Rules to view its protocol rules and policies.
Alarm Policy
Yes
Select an alarm policy for monitoring metric items.
If not selected, TencentDB for Redis® provides a default alarm policy. You can navigate to the alarm management page of Tencent Cloud Observability Platform (TCOP) to view the default policy.
To select a custom alarm policy, log in to the Alarm Management page of TCOP in advance to configure the alarm policy. For specific operations, see Creating Alarm Policy.
Instance Name
Yes
Enter only Chinese characters, English letters, digits, hyphens "-", and underscores "_" with a length less than 60 characters.
Set Password
Yes
Select the password authentication method. You can choose between Password Authentication and Password-Free Authentication. The default is set to Password Authentication. For Memcached Edition, only password-free authentication is supported, which is Password-Free Access.
Password
No
When Set Password is set to Password Authentication, you need to set an access password for the instance. The password complexity requirements are as follows:
The number of characters should be between 8 and 64.
The password should contain at least two types of the following characters: lowercase letters, uppercase letters, digits, and special characters ()`~!@#$%^&*-+=_|{}[]:;<>,.?/.
The password cannot start with "/".
Confirm Password
No
Re-enter the access password of the instance.
Quantity
Yes
Pay-as-you-go: A maximum of 50 instances can be purchased at a time, with a limit of 200 instances per region.
Yearly/monthly subscription: A maximum of 50 instances can be purchased at a time, with no limit per region.
Validity Period
No
When the yearly/monthly subscription billing mode is selected, you need to choose the validity period for the instance. Greater discounts are applied for longer validity periods. Select the period based on actual business needs.
Auto-Renewal
No
When selecting the yearly/monthly subscription billing mode, you can choose whether to enable the automatic renewal feature, which means Tencent Cloud will automatically deduct fees from your account monthly upon expiration.
Terms of Service
Yes
Click Terms of Service to read and fully understand the relevant terms regarding service content, fees, usage rules, intellectual property, and other aspects of using the cloud database service.
Click Service Level Agreement to understand the agreements that need to be complied with when using TencentDB for Redis®.
Select I have read and agreed to Terms of Service and Service Level Agreement.
3. Confirm that the parameters are correctly configured, click Buy Now, and you will be notified of the successful purchase. Then click Go to Console to return to the instance list. Once the instance status shows Running, the instance can be used normally.
Note:
After activating TencentDB for Redis®, make sure your account has sufficient balance. Insufficient balance may lead to overdue payments and even instance reclamation. For details, see Overdue Payments.
For more subsequent operations, see Creating TencentDB for Redis Instance.
Purchasing API
API Name
API Feature
CreateInstances
Creates a TencentDB for Redis instance

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Parameter Name	Required or Not	Parameter Description
Billing Mode	Yes	Supported billing modes include yearly/monthly subscription and pay-as-you-go. For how to choose a billing mode, see Billing Overview.
Region	Yes	Select a region for the instance. You can select the nearest region to reduce access latency. Once an instance is created successfully, the region cannot be changed. Please select the region with caution. Please select the same region as the Cloud Virtual Machine (CVM) instance; otherwise, communication via the private network cannot be established directly. Cloud products in different regions cannot communicate via the private network, and the region cannot be changed after purchase. Please select the region with caution. For example, a CVM instance in the Guangzhou region cannot access a Redis instance in the Shanghai region via the private network. If you need cross-region private network communication, see Cloud Connect Network.
Instance Edition	Yes	Redis Edition: a high-performance edition based on the open-source Redis storage engine. Memcached Edition: an edition based on the Memcached storage engine. ValKey Edition: an edition based on the ValKey storage engine.
Compatible Version	Yes	Redis Edition: compatible with Redis versions 7.0, 6.2, 5.0, 4.0, and 2.8. Redis version 2.8 is no longer available for purchase. We recommend version 4.0 or later. To purchase version 2.8, submit a ticket to apply. Memcached Edition: compatible with Memcached protocol version 1.6. ValKey Edition: compatible with ValKey version 8.0.
Architecture	Yes	Select a deployment architecture. For details, see Memory Edition (Standard Architecture) and Memory Edition (Cluster Architecture). Redis Edition: Version 4.0 or later supports Standard Architecture and Cluster Architecture. Version 2.8 only supports Standard Architecture. Memcached Edition: only supports Cluster Architecture. ValKey Edition: supports Standard Architecture and Cluster Architecture.
Memory	Yes	When selecting Standard Architecture, you need to configure the required memory specifications in the range of 256 MB to 64 GB.
Replica Quantity	Yes	Select the number of database replicas. Note: Multiple replicas provide primary/secondary high availability and enhance data security. You can also scale read-only performance by using replicas. The number of replicas in different regions or editions may vary. It is subject to the default settings in the console.
Shard Quantity	Yes	When selecting Cluster Architecture, you need to set the number of shards. Increasing the number of shards can enhance the cluster's storage capacity. Please select based on your needs.
Shard Capacity	Yes	When selecting Cluster Architecture, you need to set the capacity for each shard.
Specs Preview	-	Preview the currently selected specifications and the supported maximum number of connections and maximum network throughput to confirm whether they meet your expectations. Note: For newly purchased instances, the maximum network throughput here already includes the default additional bandwidth. The additional bandwidth for Standard Architecture is consistent with that of Cluster Architecture 1 shard.
Read-Only Replica	No	Select whether to enable the read/write separation feature. This feature is only supported by Redis Edition and is not currently available for Memcached Edition or ValKey Edition. Enabling read/write separation routes write operations to the primary node and read operations to replica nodes. Data read from replica nodes will lag behind the primary node. If you disable the feature when you purchase instances, you can enable it later based on actual business needs. For details, see Read/Write Separation.
Network	Yes	Supports only VPC.
AZ	Yes	Select whether to enable multi-AZ deployment. Both single-AZ and multi-AZ deployments are supported. Compared with single-AZ instances, multi-AZ instances offer higher availability and disaster recovery capabilities; see Multi-AZ Deployment. For single-AZ deployment, you must specify an AZ for the primary node simultaneously. For multi-AZ deployment, after selecting the master AZ, you must also assign an AZ to each replica from the dropdown list under Replica x, where x represents the replica number, such as Replica 1 and Replica 2.
IPv4 Network	Yes	Select the specific VPC and subnet. We recommend that you select the same VPC as your CVM instance in the same region. A VPC has a region attribute (such as Guangzhou), while a subnet has an AZ attribute (such as Guangzhou Zone 1). A VPC can be divided into one or more subnets. Different subnets in the same VPC are communicable on the private network by default, and different VPCs (regardless of whether they are in the same region) are isolated on the private network by default. After purchasing an instance, you can switch its VPC. For specific operations, see Switching VPCs. You can also click Create VPCs and Create Subnets to rebuild the required network environment. For specific operations, see Creating VPC.
Port	Yes	Custom port number in the value range of [1024,65535]. The network port can be modified after the instance is purchased. Redis Edition: The default port number is 6379. Memcached Edition: The default port number is 11211. ValKey Edition: The default port number is 6379.
Parameter Template	No	Select the Redis Edition-related parameter template. Memcached Edition and ValKey Edition do not support selecting parameter templates. The system automatically adapts the corresponding default template based on the selected compatible version and architecture, and configures parameter attributes for instances in batches. For details about parameter templates, see the default system templates in Managing Parameter Templates. If you want to create a template, click Create Parameter Template. For specific operations, see Managing Parameter Templates.
Project	Yes	Assign the corresponding project to the instance in the dropdown list. You can manage the instance by project. By default, the project is Default Project. Click Create Project on the Project Management page, where you can customize the project name to manage cloud resources.
Tag	No	Set a tag to the instance. You can manage the instance by tag. Click Add to select the tag key and value.
Security Group	Yes	Configure security group rules for the instance to control inbound traffic to the database. You can select an existing security group in the Please select dropdown list, or click Custom Security Groups to set new inbound rules for a security group. For details, see Configuring Security Group. After selecting a security group in the dropdown list, click Preview Rules to view its protocol rules and policies.
Alarm Policy	Yes	Select an alarm policy for monitoring metric items. If not selected, TencentDB for Redis^® provides a default alarm policy. You can navigate to the alarm management page of Tencent Cloud Observability Platform (TCOP) to view the default policy. To select a custom alarm policy, log in to the Alarm Management page of TCOP in advance to configure the alarm policy. For specific operations, see Creating Alarm Policy.
Instance Name	Yes	Enter only Chinese characters, English letters, digits, hyphens "-", and underscores "_" with a length less than 60 characters.
Set Password	Yes	Select the password authentication method. You can choose between Password Authentication and Password-Free Authentication. The default is set to Password Authentication. For Memcached Edition, only password-free authentication is supported, which is Password-Free Access.
Password	No	When Set Password is set to Password Authentication, you need to set an access password for the instance. The password complexity requirements are as follows: The number of characters should be between 8 and 64. The password should contain at least two types of the following characters: lowercase letters, uppercase letters, digits, and special characters ()`~!@#$%^&*-+=_\|{}[]:;<>,.?/. The password cannot start with "/".
Confirm Password	No	Re-enter the access password of the instance.
Quantity	Yes	Pay-as-you-go: A maximum of 50 instances can be purchased at a time, with a limit of 200 instances per region. Yearly/monthly subscription: A maximum of 50 instances can be purchased at a time, with no limit per region.
Validity Period	No	When the yearly/monthly subscription billing mode is selected, you need to choose the validity period for the instance. Greater discounts are applied for longer validity periods. Select the period based on actual business needs.
Auto-Renewal	No	When selecting the yearly/monthly subscription billing mode, you can choose whether to enable the automatic renewal feature, which means Tencent Cloud will automatically deduct fees from your account monthly upon expiration.
Terms of Service	Yes	Click Terms of Service to read and fully understand the relevant terms regarding service content, fees, usage rules, intellectual property, and other aspects of using the cloud database service. Click Service Level Agreement to understand the agreements that need to be complied with when using TencentDB for Redis^®. Select I have read and agreed to Terms of Service and Service Level Agreement.

API Name	API Feature
CreateInstances	Creates a TencentDB for Redis instance

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Scenarios

Purchase Preparations

Purchase in the Console

Purchasing API