Release Notes and Announcements

Release Notes

Product Announcements

User Guide

Product Introduction

Overview

Product Architecture

Strengths

Use Cases

Regions and AZs

Major Version Lifecycle Explanation

Features and Differences

Instance Types

Instance Specifications

Storage Types

Common Concepts

Network Environment

License Statement

Purchase Guide

Billing Overview

Product Pricing

Purchase Methods

Renewal Instructions

Payment Overdue

Refund

From Pay-as-You-Go to Monthly Subscription

Instance Adjustment Fees Description

Local Backup Space Billing

Cross-Region Backup Billing

Viewing Bill Details

Getting Started

Creating TencentDB for SQL Server Instance

Connecting to TencentDB for SQL Server Instance

Managing TencentDB for SQL Server Instance

Operation Guide

Constraints and Limits

Usage Specifications and Suggestions

Maintaining Instance

Adjusting Instance Configuration

Read-Only Instance

Network and Security

Account Management

Database Management

Data Security

Parameter Configuration

Monitoring and Alarms

Backup and Restoration

Log Management

Publish-Subscribe

SSIS

Data Migration (New)

Data Migration (Legacy)

Data Synchronization (DTS)

Practical Tutorial

TencentDB for SQL Server Methods for Regular Maintenance

TencentDB for SQL Server Optimization of Slow SQL

How to Better Use Tempdb

Cross-Account Backup Restoration

Creating VPC for TencentDB for SQL Server

Connecting Kingdee K/3 WISE to TencentDB for SQL Server

Account Permissions and Permission Control

Enabling and Disabling the CDC Feature

Shrinking a Database

API Documentation

History

Introduction

API Category

Making API Requests

Sales and fee related APIs

Instance Management related APIs

Operation and maintenance management related APIs

Network management related APIs

Account management related APIs

Database management related APIs

Security group management related APIs

Data security encryption related APIs

Parameter configuration related APIs

Extended Event related APIs

Log management related APIs

Read only instance management related APIs

Publish and subscribe related APIs

Backup related APIs

Rollback related APIs

Data migration (cold standby migration) related APIs

SQL Server Integration Services (SSIS) related APIs

Data migration (DTS old version) related APIs

Data Types

Error Codes

FAQs

Overview

Model Selection

Pricing and Selection

Connection and Network

Account and Permission

Backup and Rollback

Data Migration

Publish/Subscribe

Read-Only Instance

Version and Architecture Upgrade

Disk Space and Specification Adjustment

Monitoring and Alarms

Log-Related

Parameter Modification

Features

Performance, Space, and Memory-Related FAQs

Service Agreement

Service Level Agreement

Performance Evaluation

Performance Test Report

Glossary

Regions and AZs

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最終更新日: 2026-01-14 11:01:59

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 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 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
East China (Shanghai Finance)
ap-shanghai-fsi
Shanghai Finance Zone 1 (only for financial institutions and enterprises; submit a ticket to apply for support.) (sold out)
ap-shanghai-fsi-1
﻿
Shanghai Finance Zone 3 (only for financial institutions and enterprises; submit a ticket to apply for support.)
ap-shanghai-fsi-3
﻿
Shanghai Finance Zone 4 (only for financial institutions and enterprises; submit a ticket to apply for support.)
ap-shanghai-fsi-4
North China (Beijing) 
ap-beijing
Beijing Zone 1 
ap-beijing-1
﻿
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
North China (Beijing Finance)
ap-beijing-fsi
Beijing Finance Zone 1 (only for financial institutions and enterprises; submit a ticket to apply for support.)
ap-beijing-fsi-1
﻿
Beijing Finance Zone 2 (only for financial institutions and enterprises; submit a ticket to apply for support.)
ap-beijing-fsi-2
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
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
Middle East (Riyadh)
me-riyadh
Riyadh Zone 1
me-saudi-arabia-1
﻿
Riyadh Zone 2
me-saudi-arabia-2
Availability Zones Supported by Each Version of the Architecture
China
Asia Pacific
Europe and Americas
Middle East
Region
Availability Zone
Multi-Node Cloud Disk Edition
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
✓
✓
✓
✓
✓
×
Shanghai Finance
ap-shanghai-fsi
Shanghai Finance Zone 3
ap-shanghai-fsi-3
×
✓
✓
✓
×
×
﻿
Shanghai Finance Zone 4
ap-shanghai-fsi-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 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
✓
✓
✓
✓
✓
×
Beijing Finance
ap-beijing-fsi
Beijing Finance Zone 1
ap-beijing-fsi-1
×
✓
✓
✓
×
×
﻿
Beijing Finance Zone 2
ap-beijing-fsi-2
×
✓
✓
✓
×
×
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
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
×
✓
✓
×
×
Region
AZ
Single-Node Cluster Edition
Two-Node Cluster Edition
Read-only Cluster Edition
Two-Node (Local Disk)
Read-only (Local Disk)
Middle East (Riyadh)
me-riyadh
Riyadh Zone 1
me-saudi-arabia-1
✓
✓
✓
×
×
﻿
Riyadh Zone 2
me-saudi-arabia-2
✓
✓
✓
×
×
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.
﻿CVM Instance﻿
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.

Custom Image


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.

Elastic IP


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.

Security Group


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.


 Cloud Block Storage (CBS) 


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.


 Snapshot 


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 



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



subnet-xxxxxxxx


Can only be used in a single availability zone within a single region.


Users cannot create subnets across availability zones.

﻿Routing Table﻿
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.
Related Operations
TencentDB for SQL Server supports cross-AZ instance migration. For more information, see Migrating Across AZs.

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フィードバック

Region	AZ
South China (Guangzhou) ap-guangzhou	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 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
East China (Nanjing) ap-nanjing		Nanjing Zone 2 ap-nanjing-2
East China (Shanghai Finance) ap-shanghai-fsi	Shanghai Finance Zone 1 (only for financial institutions and enterprises; submit a ticket to apply for support.) (sold out) ap-shanghai-fsi-1
		Shanghai Finance Zone 3 (only for financial institutions and enterprises; submit a ticket to apply for support.) ap-shanghai-fsi-3
		Shanghai Finance Zone 4 (only for financial institutions and enterprises; submit a ticket to apply for support.) ap-shanghai-fsi-4
North China (Beijing) ap-beijing	Beijing Zone 1 ap-beijing-1
		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
North China (Beijing Finance) ap-beijing-fsi	Beijing Finance Zone 1 (only for financial institutions and enterprises; submit a ticket to apply for support.) ap-beijing-fsi-1
North China (Beijing Finance) ap-beijing-fsi		Beijing Finance Zone 2 (only for financial institutions and enterprises; submit a ticket to apply for support.) ap-beijing-fsi-2
Southwest China (Chengdu) ap-chengdu	Chengdu Zone 1 ap-chengdu-1
Southwest China (Chengdu) ap-chengdu		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

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
Southeast Asia ( Jakarta ) ap-jakarta		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
Southeast Asia (Bangkok) ap-bangkok		Bangkok Zone 2 (Bangkok nodes can cover services in Southeast Asia) ap-bangkok-2
Northeast Asia (Seoul) ap-seoul	Seoul Zone 1 (Seoul nodes can cover services in Northeast Asia) ap-seoul-1
Northeast Asia (Seoul) ap-seoul		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
Northeast Asia (Tokyo) ap-tokyo		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
US West (Silicon Valley) na-siliconvalley		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
East US (Virginia) na-ashburn		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
Europe (Frankfurt) eu-frankfurt		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
Middle East (Riyadh) me-riyadh	Riyadh Zone 1 me-saudi-arabia-1
Middle East (Riyadh) me-riyadh		Riyadh Zone 2 me-saudi-arabia-2

Region	Availability Zone	Multi-Node Cloud Disk Edition	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	✓	✓	✓	✓	✓	×
Shanghai Finance ap-shanghai-fsi	Shanghai Finance Zone 3 ap-shanghai-fsi-3	×	✓	✓	✓	×	×
Shanghai Finance ap-shanghai-fsi		Shanghai Finance Zone 4 ap-shanghai-fsi-4	×	✓	✓	✓	×	×
Nanjing ap-nanjing	Nanjing Zone 1 ap-nanjing-1	×	✓	✓	✓	✓	✓
Nanjing ap-nanjing		Nanjing Zone 2 ap-nanjing-2	×	✓	✓	✓	✓	✓
Beijing ap-beijing	Beijing Zone 1 ap-beijing-1	×	×	×	×	✓	✓
		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	✓	✓	✓	✓	✓	×
Beijing Finance ap-beijing-fsi	Beijing Finance Zone 1 ap-beijing-fsi-1	×	✓	✓	✓	×	×
Beijing Finance ap-beijing-fsi		Beijing Finance Zone 2 ap-beijing-fsi-2	×	✓	✓	✓	×	×
Chengdu ap-chengdu	Chengdu Zone 1 ap-chengdu-1	×	✓	✓	✓	✓	×
Chengdu ap-chengdu		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	AZ	Single-Node Cluster Edition	Two-Node Cluster Edition	Read-only Cluster Edition	Two-Node (Local Disk)	Read-only (Local Disk)
Middle East (Riyadh) me-riyadh	Riyadh Zone 1 me-saudi-arabia-1	✓	✓	✓	×	×
Middle East (Riyadh) me-riyadh		Riyadh Zone 2 me-saudi-arabia-2	✓	✓	✓	×	×

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.
CVM Instance	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.
Custom Image	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.
Elastic IP	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.
Security Group	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.
Cloud Block Storage (CBS)	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.
Snapshot	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	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	subnet-xxxxxxxx	Can only be used in a single availability zone within a single region.	Users cannot create subnets across availability zones.
Routing Table	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.

tencent cloud

TencentDB for SQL Server

Regions and AZs

Region

Overview

Characteristics

AZ

Overview

Characteristics

China

Other Countries and Regions

Availability Zones Supported by Each Version of the Architecture

Selection of Regions and AZs

Resource Availability

Related Operations

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