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TencentDB for SQL Server
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    Regions and AZs

    Last updated: 2024-07-30 16:18:53
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      Region

      Overview

      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.

      Characteristics

      The networks of different regions are fully isolated from each other, and Tencent Cloud services in different regions cannot communicate using private networks by default.
      Tencent Cloud services in different VPCs can communicate with each other over Cloud Connect Network which is fast and stable.
      Cloud Load Balancer currently supports intra-region traffic forwarding by default. If cross-region binding is enabled, cross-region binding of CLB and TencentDB instances is supported.

      AZ

      Overview

      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.

      Characteristics

      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.

      China

      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
      South China ( Shenzhen Finance ) ap-shenzhen-fsi
      Shenzhen Finance Zone 1 (only available for financial institutions and enterprises Submit a ticket to apply for activation.) ap-shenzhen-fsi-1
      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
      North China ( Beijing Finance ) ap-beijing-fsi
      Beijing Finance Zone 1 (only available for financial institutions and enterprises Submit a ticket to apply for activation.) ap-beijing-fsi-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
      Hong Kong Zone 3 (Hong Kong nodes cover services in the China regions of Hong Kong, Macao, and Taiwan)
      ap-hongkong-3

      Other Countries and Regions

      Region
      Availability Zone
      Southeast Asia (Singapore)
      ap-singapore
      Singapore Zone 1 (Singapore nodes can cover services in Southeast Asia)
      ap-singapore-1
      Singapore Zone 2 (Singapore nodes can cover services in Southeast Asia)
      ap-singapore-2
      Singapore Zone 3 (Singapore nodes can cover services in Southeast Asia)
      ap-singapore-3
      Singapore Zone 4 (Singapore nodes can cover services in Southeast Asia)
      ap-singapore-4
      Southeast Asia ( Jakarta )
      ap-jakarta
      Jakarta Zone 1 (Jakarta nodes can cover services in Southeast Asia)
      ap-jakarta-1
      Jakarta Zone 2 (Jakarta nodes can cover services in Southeast Asia) ap-jakarta-2
      Southeast Asia (Bangkok)
      ap-bangkok
      Bangkok Zone 1 (Bangkok nodes can cover services in Southeast Asia)
      ap-bangkok-1
      Bangkok Zone 2 (Bangkok nodes can cover services in Southeast Asia)
      ap-bangkok-2
      South Asia (Mumbai)
      ap-mumbai
      Mumbai Zone 1 (Mumbai nodes can cover services in Southeast Asia)
      ap-mumbai-1
      Mumbai Zone 2 (Mumbai nodes can cover services in Southeast Asia)
      ap-mumbai-2
      Northeast Asia (Seoul)
      ap-seoul
      Seoul Zone 1 (Seoul nodes can cover services in Northeast Asia)
      ap-seoul-1
      Seoul Zone 2 (Seoul nodes can cover services in Northeast Asia)
      ap-seoul-2
      Northeast Asia (Tokyo)
      ap-tokyo
      Tokyo Zone 1 (Tokyo nodes can cover services in Northeast Asia)
      ap-tokyo-1
      Tokyo Zone 2 (Tokyo nodes can cover services in Northeast Asia)
      ap-tokyo-2
      US West (Silicon Valley)
      na-siliconvalley
      Silicon Valley Zone 1 (Silicon Valley nodes can cover services in West US)
      na-siliconvalley-1
      Silicon Valley Zone 2 (Silicon Valley nodes can cover services in West US)
      na-siliconvalley-2
      East US (Virginia)
      na-ashburn
      Virginia Zone 1 (Virginia nodes can cover services in East US)
      na-ashburn-1
      Virginia Zone 2 (Virginia nodes can cover services in East US)
      na-ashburn-2
      Europe (Frankfurt)
      eu-frankfurt
      Frankfurt Zone 1 (Frankfurt nodes can cover services in Europe)
      eu-frankfurt-1
      Frankfurt Zone 2 (Frankfurt nodes cover services in Europe)
      eu-frankfurt-2
      South America (São Paulo)
      sa-saopaulo
      São Paulo Zone 1 (São Paulo nodes can cover services in South America)
      sa-saopaulo-1

      Availability Zones Supported by Each Version of the Architecture

      China
      Asia Pacific
      Europe and Americas
      Region
      Availability Zone
      Cloud Disk Edition Single Node
      Cloud Disk Edition Two-Node
      Cloud Disk Edition RO
      Local Disk Two-Node
      Local Disk RO
      Guangzhou
      ap-guangzhou
      Guangzhou Zone 3
      ap-guangzhou-3
      ✓
      ×
      ×
      ✓
      ✓
      Guangzhou Zone 6
      ap-guangzhou-6
      ✓
      ✓
      ✓
      ✓
      ×
      Guangzhou Zone 7
      ap-guangzhou-7
      ✓
      ✓
      ✓
      ✓
      ×
      Shanghai
      ap-shanghai
      Shanghai Zone 2
      ap-shanghai-2
      ✓
      ✓
      ✓
      ✓
      ✓
      Shanghai Zone 3
      ap-shanghai-3
      ✓
      ×
      ×
      ✓
      ✓
      Shanghai Zone 4
      ap-shanghai-4
      ✓
      ✓
      ✓
      ✓
      ✓
      Shanghai Zone 5
      ap-shanghai-4
      ✓
      ✓
      ✓
      ✓
      ×
      Nanjing
      ap-nanjing
      Nanjing Zone 1
      ap-nanjing-1
      ✓
      ✓
      ✓
      ✓
      ✓
      Nanjing Zone 2
      ap-nanjing-2
      ✓
      ✓
      ✓
      ✓
      ✓
      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
      ✓
      ✓
      ✓
      ✓
      ×
      Chengdu
      ap-chengdu
      Chengdu Zone 1
      ap-chengdu-1
      ✓
      ✓
      ✓
      ✓
      ×
      Chengdu Zone 2
      ap-chengdu-2
      ✓
      ✓
      ✓
      ✓
      ×
      Chongqing
      ap-chongqing
      Chongqing Zone 1
      ap-chongqing-1
      ✓
      ✓
      ✓
      ✓
      ×
      Hong Kong (China)
      ap-hongkong
      Hong Kong Zone 1
      ap-hongkong-1
      ×
      ×
      ×
      ✓
      ✓
      Hong Kong (China) Zone 2
      ap-hongkong-2
      ✓
      ✓
      ✓
      ✓
      ✓
      Hong Kong Zone 3
      ap-hongkong-3
      ×
      ✓
      ✓
      ✓
      ×
      Region
      Availability Zone
      Cloud Disk Edition Single Node
      Cloud Disk Edition Two-Node
      Cloud Disk Edition RO
      Local Disk Two-Node
      Local Disk RO
      Mumbai
      ap-mumbai
      Mumbai Zone 1
      ap-mumbai-1
      ×
      ✓
      ✓
      ×
      ×
      Mumbai Zone 2
      ap-mumbai-2
      ×
      ✓
      ✓
      ×
      ×
      Singapore
      ap-singapore
      Singapore Zone 1
      ap-singapore-1
      ✓
      ×
      ×
      ×
      ×
      Singapore Zone 2
      ap-singapore-2
      ✓
      ×
      ×
      ×
      ×
      Singapore Zone 3
      ap-singapore-3
      ×
      ✓
      ✓
      ×
      ×
      Singapore Zone 4
      ap-singapore-4
      ×
      ✓
      ✓
      ×
      ×
      Jakarta
      ap-jakarta
      Jakarta Zone 1
      ap-jakarta-1
      ✓
      ×
      ×
      ×
      ×
      Bangkok
      ap-bangkok
      Bangkok Zone 1
      ap-bangkok-1
      ✓
      ×
      ×
      ×
      ×
      Bangkok Zone 2
      ap-bangkok-2
      ✓
      ×
      ×
      ×
      ×
      Seoul
      ap-seoul
      Seoul Zone 1
      ap-seoul-1
      ✓
      ✓
      ✓
      ✓
      ×
      Seoul Zone 2
      ap-seoul-2
      ✓
      ✓
      ✓
      ×
      ×
      Tokyo
      ap-tokyo
      Tokyo Zone 1
      ap-tokyo-1
      ✓
      ✓
      ×
      ✓
      ×
      Tokyo Zone 2
      ap-tokyo-2
      ✓
      ✓
      ×
      ✓
      ×
      Region
      Availability Zone
      Cloud Disk Edition Single Node
      Cloud Disk Edition Two-Node
      Cloud Disk Edition RO
      Local Disk Two-Node
      Local Disk RO
      Virginia
      na-ashburn
      Virginia Zone 1
      na-ashburn-1
      ×
      ✓
      ✓
      ×
      ×
      Virginia Zone 2
      na-ashburn-2
      ×
      ✓
      ✓
      ×
      ×
      Frankfurt
      eu-frankfurt
      Frankfurt Zone 1
      eu-frankfurt-1
      ×
      ✓
      ✓
      ×
      ×
      Frankfurt Zone 2
      eu-frankfurt-2
      ×
      ✓
      ✓
      ×
      ×
      Silicon Valley
      na-siliconvalley
      Silicon Valley Zone 1
      na-siliconvalley-1
      ×
      ✓
      ✓
      ✓
      ×
      Silicon Valley Zone 2
      na-siliconvalley-2
      ×
      ✓
      ✓
      ✓
      ×
      São Paulo
      sa-saopaulo
      São Paulo Zone 1
      sa-saopaulo-1
      ×
      ✓
      ✓
      ×
      ×

      Selection of Regions and AZs

      The geographic locations of TencentDB instances, your business, and your target users.
      We recommend you choose the region closest to your end users when purchasing TencentDB instances to minimize access latency and improve access speed.
      Other Tencent Cloud services you use.
      When you select other Tencent Cloud services, we recommend you try to locate them all in the same region and AZ to allow them to communicate with each other through the private network, reducing access latency and increasing access speed.
      High availability and disaster recovery.
      Even if you have just one VPC, we still recommend you deploy your businesses in different AZs to prevent a single point of failure and enable cross-AZ disaster recovery.
      There may be network latency among different AZs. We recommend you assess your business requirements and find the optimal balance between high availability and low latency.
      If you need access to servers in other countries or regions, we recommend you select an instance in those other countries or regions. If you use a TencentDB instance in China to access servers in other countries and regions, you may encounter a higher network latency.

      Resource Availability

      The following table describes which resources are global, which are regional, and which are specific to AZs.
      Resources
      Resource ID Format <Resource abbreviation>-8-Digit String of Numbers and Letters
      Type
      Description
      User account
      No restrictions
      Globally unique
      A user can use the same account to access Tencent Cloud resources worldwide.
      SSH Key
      skey-xxxxxxxx
      Available in all regions
      A user can use an SSH key to bind to any region's CVM under the account.
      ins-xxxxxxxx
      Can only be used in a single availability zone within a single region.
      Users can only create CVM instances in specific availability zones.
      img-xxxxxxxx
      Available in a single region and multiple availability zones
      Users can create a custom image for an instance and use it across different Availability Zones within the same region. To use the image in other regions, please use the image replication feature to copy the custom image to other regions.
      eip-xxxxxxxx
      Available in a single region and multiple availability zones
      Elastic IP addresses are created within a specific region and can only be associated with instances in the same Region.
      sg-xxxxxxxx
      Available in a single region and multiple availability zones
      Security groups are created within a specific region and can only be associated with instances in the same Region. Tencent Cloud automatically creates three default security groups for users.
      disk-xxxxxxxx
      Can only be used in a single availability zone within a single region.
      Users can only create CBS in a specific availability zone and attach them to instances in the same availability zone.
      snap-xxxxxxxx
      Available in a single region and multiple availability zones
      After creating a snapshot for a specific CBS, the user can use the snapshot for other operations (such as creating a CBS) in the same region.
       CLB 
      clb-xxxxxxxx
      Available in a single region and multiple availability zones
      CLB can be bound to CVM instances in different availability zones within the same region for traffic forwarding.
      vpc-xxxxxxxx
      Available in a single region and multiple availability zones
      VPC is created in a specific region and resources belonging to the same VPC can be created in different availability zones.
      subnet-xxxxxxxx
      Can only be used in a single availability zone within a single region.
      Users cannot create subnets across availability zones.
      rtb-xxxxxxxx
      Available in a single region and multiple availability zones
      When creating a routing table, users need to specify a specific VPC, thus it follows the location attribute of the VPC.
      TencentDB for SQL Server supports cross-AZ instance migration. For more information, see Migrating Across AZs.
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