A region is the physical location of an IDC. In Tencent Cloud, regions are fully isolated from each other, ensuring cross-region stability and fault tolerance. When purchasing Tencent Cloud services, we recommend selecting the region closest to your end users to minimize access latency and improve download speed.
An availability zone (AZ) is a physical IDC of Tencent Cloud with independent power supply and network in the same region. It can ensure business stability, as failures (except for major disasters or power failures) in one AZ are isolated without affecting other AZs in the same region. By starting an instance in an independent AZ, users can protect their applications from being affected by a single point of failure.
Tencent Cloud services in the same VPC are interconnected over the private network, which means they can communicate using private IPs, even if they are in different AZs of the same region.
Note:Private network interconnection refers to the interconnection of resources under the same account. Resources under different accounts are completely isolated on the private network.
Region | AZ |
---|---|
South China (Guangzhou) ap-guangzhou |
Guangzhou Zone 1 (sold out) ap-guangzhou-1 |
Guangzhou Zone 2 (sold out) ap-guangzhou-2 | |
Guangzhou Zone 3 ap-guangzhou-3 | |
Guangzhou Zone 4 (sold out) ap-guangzhou-4 | |
Guangzhou Zone 6 ap-guangzhou-6 | |
Guangzhou Zone 7 ap-guangzhou-7 | |
East China (Shanghai) ap-shanghai |
Shanghai Zone 1 (sold out) ap-shanghai-1 |
Shanghai Zone 2 ap-shanghai-2 | |
Shanghai Zone 3 ap-shanghai-3 | |
Shanghai Zone 4 ap-shanghai-4 | |
Shanghai Zone 5 ap-shanghai-5 | |
East China (Nanjing) ap-nanjing |
Nanjing Zone 1 ap-nanjing-1 |
Nanjing Zone 2 ap-nanjing-2 | |
North China (Beijing) ap-beijing |
Beijing Zone 1 ap-beijing-1 |
Beijing Zone 2 ap-beijing-2 | |
Beijing Zone 3 ap-beijing-3 | |
Beijing Zone 4 ap-beijing-4 | |
Beijing Zone 5 ap-beijing-5 | |
Beijing Zone 6 ap-beijing-6 | |
Beijing Zone 7 ap-beijing-7 | |
Southwest China (Chengdu) ap-chengdu |
Chengdu Zone 1 ap-chengdu-1 |
Chengdu Zone 2 ap-chengdu-2 | |
Southwest China (Chongqing) ap-chongqing |
Chongqing Zone 1 ap-chongqing-1 |
Hong Kong/Macao/Taiwan (Hong Kong, China) ap-hongkong |
Hong Kong Zone 1 (Hong Kong nodes cover services in the China regions of Hong Kong, Macao, and Taiwan) ap-hongkong-1 |
Hong Kong Zone 2 (Hong Kong nodes cover services in the China regions of Hong Kong, Macao, and Taiwan) ap-hongkong-2 |
Region | AZ |
---|---|
Southeast Asia (Singapore) ap-singapore |
Singapore Zone 1 (Singapore nodes cover services in Southeast Asia) ap-singapore-1 |
Singapore Zone 2 (Singapore nodes cover services in Southeast Asia) ap-singapore-2 | |
Southeast Asia (Jakarta) ap-jakarta |
Jakarta Zone 1 (Jakarta nodes cover services in Southeast Asia) ap-jakarta-1 |
Southeast Asia (Bangkok) ap-bangkok |
Bangkok Zone 1 (Bangkok nodes cover services in Southeast Asia) ap-bangkok-1 |
Bangkok Zone 2 (Bangkok nodes cover services in Southeast Asia) ap-bangkok-2 |
|
Northeast Asia (Seoul) ap-seoul |
Seoul Zone 1 (Seoul nodes cover services in Northeast Asia) ap-seoul-1 |
Northeast Asia (Tokyo) ap-tokyo |
Tokyo Zone 1 (Tokyo nodes cover services in Northeast Asia) ap-tokyo-1 |
Tokyo Zone 2 (Tokyo nodes cover services in Northeast Asia) ap-tokyo-2 | |
Western US (Silicon Valley) na-siliconvalley |
Silicon Valley Zone 1 (Silicon Valley nodes cover services in Western US) na-siliconvalley-1 |
Silicon Valley Zone 2 (Silicon Valley nodes cover services in Western US) na-siliconvalley-2 | |
Europe (Moscow) eu-moscow |
Moscow Zone 1 (Moscow nodes cover services in Europe) eu-moscow-1 |
The following table describes which resources are global, which are regional, and which are specific to AZs.
Resource | Resource ID Format | Type | Description |
---|---|---|---|
User account | No limit | Globally unique | You can use the same account to access Tencent Cloud resources from around the world. |
SSH key | skey-xxxxxxxx | Global | You can use an SSH key to bind a CVM instance in any region under the account. |
CVM instance | ins-xxxxxxxx | AZ-specific | A CVM instance created in an AZ is not available in other AZs. |
Custom image | img-xxxxxxxx | Regional | Custom images created for the instance are available in all AZs in the same region. Use the image replication feature to copy a custom image if you need to use it in other regions. |
EIP | eip-xxxxxxxx | Regional | EIPs are created in a region and can only be associated with instances in the same region. |
Security group | sg-xxxxxxxx | Regional | A security group can only be associated with instances in the same region. Tencent Cloud automatically creates three default security groups for you. |
Cloud disk | disk-xxxxxxxx | AZ-specific | You can only create a CBS cloud disk in a specific AZ and mount it to instances in the same AZ. |
Snapshot | snap-xxxxxxxx | Regional | A snapshot created from a cloud disk can be used for other purposes (such as creating cloud disks) in the same region. |
CLB instance | clb-xxxxxxxx | Regional | CLB instances can be bound to CVM instances in different AZs in the same region for traffic forwarding. |
VPC | vpc-xxxxxxxx | Regional | A VPC in one region can have resources created in different AZs in the region. |
Subnet | subnet-xxxxxxxx | AZ-specific | You cannot create subnets across AZs. |
Route table | rtb-xxxxxxxx | Regional | When creating a route table, you need to specify a VPC. Therefore, route tables are regional as well. |
TencentDB for SQL Server supports cross-AZ instance migration. For more information, see Migrating Across AZs.
Was this page helpful?