This topic describes the product feature updates and related documents for RDS for SQL Server. 2026 ## July 2026 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Added support for SQL Server 2025 Edition |You can now create instances of SQL Server 2025 Enterprise Edition and SQL Server 2025 Standard Edition. |2026\-07\-29 |All |[Create an instance](https://docs.volcengine.com/docs/6899/141335?lang=zh)

Description

This feature is available on an allowlist basis. To request access, Submit a ticket to contact the SQL Server technical team.

| |APIs for SSL and TDE encryption in the data security module are now available. |Leveraging SSL transport encryption and TDE data\-at\-rest encryption, it meets data security requirements for scenarios such as transmitting sensitive data over the public network, encrypting data at rest in the database, and database migration. |2026\-07\-29 |All |* [DescribeDBInstanceTDE - Query instance TDE status](https://docs.volcengine.com/docs/6899/1703441)

* [ModifyDBInstanceTDE - Modify the TDE configuration of an instance](https://docs.volcengine.com/docs/6899/1703501)

* [DescribeDBInstanceSSL - Query instance SSL configuration](https://docs.volcengine.com/docs/6899/2488936)

* [DownloadSSLCertificate - Download SSL certificate](https://docs.volcengine.com/docs/6899/2488935)

* [ModifyDBInstanceSSL - Modify instance SSL configuration](https://docs.volcengine.com/docs/6899/2488938) | |Supports modifying the maximum number of databases for an instance using stored procedures. |You can call this stored procedure to adjust the maximum number of databases for an instance, simplifying quota adjustments in fine\-grained operations and maintenance scenarios. |2026\-07\-29 |All |[Query and modify the maximum number of databases](https://docs.volcengine.com/docs/6899/2563114)

Description

This feature is available on an allowlist basis. To request access, Submit a ticket to contact the SQL Server technical team.

| ## May 2026 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Added support for custom SSL certificate encryption. |When SSL encryption is enabled, you can use custom SSL certificates. The related SSL encryption APIs are also available. |2026\-05\-29 |All |* [Set up SSL encryption](https://www.volcengine.com/docs/6899/1458328)

* [DescribeDBInstanceSSL - Query instance SSL configuration](https://www.volcengine.com/docs/6899/2488936)

* [DownloadSSLCertificate - Download SSL certificate](https://docs.volcengine.com/docs/6899/2488935)

* [ModifyDBInstanceSSL - Modify instance SSL configuration](https://www.volcengine.com/docs/6899/2488938) | |The 4il specification is now officially on sale. |RDS for SQL Server now supports the sale of instances with the 4il specification. |2025\-05\-29 |All |* [Primary instance specification](https://www.volcengine.com/docs/6899/141341)

* [Read-only instance specifications](https://www.volcengine.com/docs/6899/1188048) | |Optimized password validation rules for high\-privilege accounts. |A new password validation rule has been added for creating and resetting passwords for super accounts: they cannot contain the string `veyun_user` (case\-insensitive). |2026\-05\-29 |All |[Create an instance](https://www.volcengine.com/docs/6899/141335) | |Optimize the maximum number of databases supported by the instance |The maximum number of databases supported by different instance types and specifications has been standardized, and the calculation formula is published. |2025\-05\-29 |All |[Feature comparison by version](https://www.volcengine.com/docs/6899/1188193)

| ## April 2026 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Added the instance\-level character set Latin1_General_100_CI_AS_SC_UTF8 |Added a new instance\-level character set: Latin1_General_100_CI_AS_SC_UTF8. It supports full Unicode and supplementary characters with UTF\-8 encoding. |2026\-04\-03 |All |[Create an instance](https://www.volcengine.com/docs/6899/141335?TagIDs=2&lang=en) | ## January 2026 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Adds support for the distributed transaction allowlist. |Supports database distributed transactions, ensuring ACID properties for transactions across multiple databases. It resolves data consistency issues in distributed scenarios and is suitable for enterprise\-level distributed business needs. |2026\-01\-28 |All |[Configure the distributed transaction allowlist](https://www.volcengine.com/docs/6899/2129100)

tip

This feature is available on an allowlist basis. To request access, Submit a ticket to contact the SQL Server technical team.

| |System admin accounts are now supported |Each instance can have only one database account with system admin (SA) permissions. This account can be created, enabled, or disabled through the console. An account with SA permissions has all permissions for all databases. RDS for SQL Server instances with a system admin account enabled **are no longer covered by the Service Level Agreement (SLA)** , **but after\-sales service is not affected**. RDS for SQL Server instances without a system admin account are still fully covered by the SLA. |2026\-01\-28 |All |[Create and manage accounts](https://www.volcengine.com/docs/6899/1253611)

tip

This feature is available on an allowlist basis. To request access, Submit a ticket to contact the SQL Server technical team.

| |New instance specifications with a 1:4 CPU\-to\-memory ratio are now available for the High\-availability Edition for Enterprise |New instance specifications with a 1:4 CPU\-to\-memory ratio have been added for the High\-availability Enterprise Edition. The new specifications are as follows:

* rds.mssql.3il.x4.medium.e2

* rds.mssql.3il.x4.large.e2

* rds.mssql.3il.x4.xlarge.e2

* rds.mssql.3il.x4.2xlarge.e2

* rds.mssql.3il.x4.4xlarge.e2 |2026\-01\-28 |All |[Primary instance specification](https://www.volcengine.com/docs/6899/141341) | |Supports configuring read\-only instance weight |You can manually adjust the read weight of read\-only instances during peak business hours and in high\-concurrency read scenarios. You can configure it as needed, and the adjustments take effect in real time. The read\-only cluster endpoint distributes read requests based on weight. Instances with a higher weight handle more traffic, allowing for fine\-grained control over read requests and optimizing the read/write splitting service. |2026\-01\-28 |All |[Configure read-only instance weight](https://www.volcengine.com/docs/6899/2139254)

tip

This feature is available on an allowlist basis. To request access, Submit a ticket to contact the SQL Server technical team.

| |Adjusted the validity period for log backup download addresses. |The validity period of the log backup download address has been changed from 7 days to 12 hours. If a log backup download task is initiated while the download address is valid, the task will continue until completion and is not affected by the address's expiration. |2026\-01\-28 |All |[Download log backup file](https://www.volcengine.com/docs/6899/1513699) | 2025 ## December 2025 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Supports suspending instances. |Only pay\-as\-you\-go SQL Server instances can be paused. This feature is not available for subscription instances. After an instance is paused, all its functions will be unavailable and its computing resources will be released. Billing for SQL Server instance node specifications will be paused, but billing for storage space will continue. After you start the instance, normal billing for all billable items will resume. |2025\-12\-15 |All |* [Suspend a Pay-as-you-go instance](https://www.volcengine.com/docs/6899/1891336)

* [Start a pay-as-you-go instance](https://www.volcengine.com/docs/6899/1895256) | |Optimized the restoration rules for temporary upgrades performed during maintenance windows |The system defaults to the maintenance window set on the day of the upgrade. After the restoration date expires, the downgrade will automatically occur during this window. Modifying the maintenance window after the temporary upgrade does not affect the downgrade time, as the downgrade will still be performed during the maintenance window configured on the day of the upgrade. |2025\-12\-15 |All |[Temporary upgrade](https://www.volcengine.com/docs/6899/1247827) | ## September 2025 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Supports restoring from differential backups. |SQL Server now supports restoration from differential backups. Differential backup restoration effectively shortens business downtime by quickly restoring incremental data and reducing log replay, making it a key method for efficient disaster recovery and core business continuity. |2025\-09\-28 |All |* [Restore to a new instance from a backup set](https://www.volcengine.com/docs/6899/141474)

* [Restore to an existing instance from a backup set](https://www.volcengine.com/docs/6899/1130117)

* [Restore to a new instance by time in point](https://www.volcengine.com/docs/6899/153379)

* [Restore to an existing instance by point in time](https://www.volcengine.com/docs/6899/1130119) | |View the progress of TOS backup and recovery tasks |For large backup files, you can view the real\-time progress of a restore task. The progress is clearly displayed in the Restore Status column, allowing you to easily track the task at any time. |2025\-09\-28 |All |[View TOS backup and restore tasks](https://www.volcengine.com/docs/6899/805251) | |Data backup file download optimization |This update optimizes the experience of downloading physical backups for SQL Server. The underlying logic has been refactored to simplify the steps, making the process more intuitive and user\-friendly. You can now flexibly download backup files for one, multiple, or all databases. |2025\-09\-28 |All |[Download data backup files](https://www.volcengine.com/docs/6899/1116670) | ## August 2025 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Officially launched in the Asia Pacific SE (Jakarta) and Asia Pacific SE (Johor) regions |RDS for SQL Server will be officially available in the Asia Pacific SE (Jakarta) and Asia Pacific SE (Johor) regions starting August 07, 2025, Beijing time. |2025\-08\-07 |All |[Request structure](https://www.volcengine.com/docs/6899/227760) | |Supports selling RDS for SQL Server to individual users |Ideal for individual developers for learning and testing, and for small teams with lightweight business needs like personal project development or small\-scale data management. Also, each personal user account is entitled to one 7\-day unconditional unsubscription for its associated products per calendar year. |2025\-08\-07 |All |[Create an instance](https://www.volcengine.com/docs/6899/141335) | |(Beta) Supports enabling Transparent Data Encryption at the instance and database levels |Transparent Data Encryption(TDE) can be enabled at the instance level, but it can not be disabled once enabled. At the database level, TDE can be enabled or disabled. |2025\-08\-07 |All |[Enable transparent data encryption (TDE)](https://www.volcengine.com/docs/6899/1676531)

This feature is available on an allowlist basis. To request access, [submit a ticket](https://console.volcengine.com/workorder/create) to contact the SQL Server technical team. | |Supports manual allowlist synchronization. |If you modify an instance's allowlist information while it is not running, it will become out of sync. You can synchronize the allowlist manually. |2025\-08\-07 |All |[Synchronize allowlist](https://www.volcengine.com/docs/6899/1735764) | |Supports more API calls |Added APIs for data security and allowlist features.

|2025\-08\-07 |All |* Data Security

* [DescribeDBInstanceTDE](https://www.volcengine.com/docs/6899/1703441)

* [ModifyDBInstanceTDE](https://www.volcengine.com/docs/6899/1703501)

* Allowlist

* [DescribeInstanceAllowLists](https://www.volcengine.com/docs/6899/1663487)

* [SyncInstanceAllowList](https://www.volcengine.com/docs/6899/1663486)

The four APIs above are on an allowlist. To use them, [Submit a ticket](https://console.volcengine.com/workorder/create) to the SQL Server technical team to request access. | |API optimization |Optimized APIs related to the allowlist feature |2025\-08\-07 |All |* [DescribeAllowListDetail](https://www.volcengine.com/docs/6899/1567142)

* [DescribeAllowLists](https://www.volcengine.com/docs/6899/1567139)

* [ModifyAllowList](https://www.volcengine.com/docs/6899/1567143)

The 3 APIs above are released via an Allowlist. To use them, [submit a ticket](https://console.volcengine.com/workorder/create) to contact the SQL Server technical team for access. | ## May 2025 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Supports specifying a Login SID when creating a database account |The Login SID must be the same as the Login SID of the local instance account to link database permissions for the on\-premises\-to\-cloud migration. |2025\-05\-28 |All |[Create an account](https://docs.volcengine.com/docs/6899/1253611) | |Provide more OpenAPI interfaces |Launched APIs for instances and backups. |2025\-05\-28 |All |* Instance

* [DeleteDBInstance](https://www.volcengine.com/docs/6899/1580532?lang=en)

* [DescribeDBInstanceSpecs](https://www.volcengine.com/docs/6899/1580528?lang=en)

* [RestartDBInstance](https://www.volcengine.com/docs/6899/1580529?lang=en)

* [ModifyDBInstanceName](https://www.volcengine.com/docs/6899/1580530?lang=en)

* [ModifyDBFailover](https://www.volcengine.com/docs/6899/1580531?lang=en)

* Backup

* [ModifyCrossBackupPolicy](https://www.volcengine.com/docs/6899/1580534?lang=en)

* [DescribeCrossBackupPolicy](https://www.volcengine.com/docs/6899/1580533?lang=en)

* [DescribeAvailableCrossRegion](https://www.volcengine.com/docs/6899/1580534?lang=en) | ## March 2025 | |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Get the client IP of the connected instance |Supports retrieving the client IP address for a connection to an RDS for SQL Server instance. |2025\-03\-26 |All |[How do I get the client IP for connecting to an RDS for SQL Server instance?](https://docs.volcengine.com/docs/6899/1513694) | |Database account password rules |Optimized support for special characters in database account passwords. Passwords can now include `~!@#$%^&*()-_+=?`. |2025\-03\-26 |All |[Reset account password](https://docs.volcengine.com/docs/6899/1253614) | |Log backup |Log backups improve database disaster recovery capabilities and data protection, ensuring business continuity and data security. If an instance fails, you can use log backups to restore the database to the most recent point in time before the failure. |2025\-03\-26 |All |* [About Backups](https://docs.volcengine.com/docs/6899/1513700)

* [Download log backup file](https://docs.volcengine.com/docs/6899/1513699)

* [ModifyBackupPolicy](https://docs.volcengine.com/docs/6899/1131884) | |Differential backup |Differential backup is now supported for physical backups in addition to full backups. |2025\-03\-26 |All |* [About Backups](https://docs.volcengine.com/docs/6899/1513700)

* [View backups](https://docs.volcengine.com/docs/6899/1459190) | ## February 2025 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Support SSL encryption |RDS for SQL Server provides an SSL (Secure Sockets Layer) encryption service to enhance the confidentiality and security of your data during transmission. |2025\-02\-21 |All |[Set up SSL encryption](https://docs.volcengine.com/docs/6899/1458328) | |You can set a default allowlist. |When creating or modifying an allowlist, you can set it as the default allowlist. The default allowlist is then automatically used as the instance's allowlist when you create or restore a new instance. |2025\-02\-21 |All |* [Create an allowlist](https://docs.volcengine.com/docs/6899/152729)

* [Modify an allowlist](https://docs.volcengine.com/docs/6899/155948)

* [Create an instance](https://docs.volcengine.com/docs/6899/141335)

* [Restore to a new instance from a backup set](https://docs.volcengine.com/docs/6899/141474)

* [Restore to a new instance by time in point](https://docs.volcengine.com/docs/6899/153379)

* [Rebuild an instance](https://docs.volcengine.com/docs/6899/216082) | |Supports creating disaster recovery instances. |RDS for SQL Server supports creating cross\-region disaster recovery instances to enhance its disaster recovery capabilities. |2025\-02\-21 |All |* [Customize backup policy](https://docs.volcengine.com/docs/6899/153377)

* [View backups](https://docs.volcengine.com/docs/6899/1459190)

* [Rebuild instance](https://docs.volcengine.com/docs/6899/216082) | |Optimize temporary upgrades |You can change the specification type of an instance during a temporary upgrade. For a temporary upgrade, the instance specification automatically reverts to its pre\-upgrade state on the specified restoration date and within the maintenance window. |2025\-02\-21 |All |[Temporary upgrade](https://docs.volcengine.com/docs/6899/1247827) | |Support audit log |RDS for SQL Server provides an audit feature to record major events at the service, database, and table levels. |2025\-02\-21 |All |[Manage audit logs](https://docs.volcengine.com/docs/6899/1392470) | |Supports restoring data with a new database name. |Supports restoring data with a new database name when recovering from a TOS backup. |2025\-02\-21 |All |[Create TOS backup recovery task](https://docs.volcengine.com/docs/6899/805252) | 2024 ## November 2024 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Supports setting a maintenance window for an instance. |To ensure service stability and reduce the impact on your business during maintenance, RDS for SQL Server allows you to configure a maintenance window when creating an instance. |2024\-11\-21 |All |[Set maintenance window](https://docs.volcengine.com/docs/6899/1382575) | |Improved allowlist feature |The allowlist now supports the `0.0.0.0/0` IP address range, allowing access from all IP addresses. You can bind ECS security groups by using associated ECSIP or by associating an inbound IP, which better aligns with actual usage scenarios. |2024\-11\-21 |All |* [Create an allowlist](https://docs.volcengine.com/docs/6899/152729)

* [Copy an allowlist](https://docs.volcengine.com/docs/6899/1386249)

* [Sync security group](https://docs.volcengine.com/docs/6899/1381357) | |The 3il specification is officially available for sale. |RDS for SQL Server now supports creating instances with the 3il specification. |2024\-11\-21 |All |* [Product specification](https://docs.volcengine.com/docs/6899/1173858)

* [Create an instance](https://docs.volcengine.com/docs/6899/141335)

* [Create read-only instance](https://docs.volcengine.com/docs/6899/1188047) | |Added project resource filtering to the top navigation bar of the console. |The SQL Server console now includes a project option in the top navigation bar, making it easier to view and manage resources under the same project. |2024\-11\-21 |All |[User guide](https://docs.volcengine.com/docs/6899/137682) | |Add stored procedures |Added support for using stored procedures to copy databases, grant database owner permissions, prevent regular users from viewing all databases, and grant account tracking permissions. |2024\-11\-21 |All |* [Copy database](https://docs.volcengine.com/docs/6899/1381350)

* [Grant database owner permissions](https://docs.volcengine.com/docs/6899/1381351)

* [Prevent regular users from viewing all databases](https://docs.volcengine.com/docs/6899/1381352)

* [Grant trace permissions to the account](https://docs.volcengine.com/docs/6899/1381354) | ## October 2024 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Supported character sets |You can set a character set when creating an instance or restoring to a new instance to ensure data consistency and reliability. |2024\-10\-11 |All |* [Create an instance](https://docs.volcengine.com/docs/6899/141335)

* [Restore to a new instance from a backup set](https://docs.volcengine.com/docs/6899/141474)

* [Restore to a new instance by time in point](https://docs.volcengine.com/docs/6899/153379)

* [CreateDBInstance](https://docs.volcengine.com/docs/6899/174605) | |Allowlist |Added support for deleting allowlists and optimized the entry for modifying allowlists. |2024\-10\-11 |All |* [Delete an allowlist](https://docs.volcengine.com/docs/6899/155949)

* [Modify an allowlist](https://docs.volcengine.com/docs/6899/155948) | |Optimize API |Optimized data backup\-related APIs. |2024\-10\-11 |All |* [DescribeBackupDetail](https://docs.volcengine.com/docs/6899/1342283)

* [CreateBackup](https://docs.volcengine.com/docs/6899/1131883)

* [DeleteBackup](https://docs.volcengine.com/docs/6899/1131885)

* [ModifyBackupPolicy](https://docs.volcengine.com/docs/6899/1131884) | ## August 2024 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Connect to SQL Server instances via DBW |You can use Database Workshop (DBW) to quickly connect to and manage SQL Server databases remotely. |2024\-08\-14 |All |[Connecting to an RDS for SQL Server instance via DBW](https://docs.volcengine.com/docs/6899/1323762) | ## June 2024 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Supports temporary instance configuration changes. |RDS for SQL Server supports temporary configuration upgrades for subscription instances, allowing you to handle short\-term business surges and reduce financial pressure. |2024\-06\-14 |All |[Temporary upgrade](https://docs.volcengine.com/docs/6899/1247827) | |Added support for more node specifications |RDS for SQL Server now supports the Exclusive Type specification when you create a Single node edition instance with SQL Server 2019 Standard Edition. |2024\-06\-14 |All |[Primary instance specification](https://docs.volcengine.com/docs/6899/141341) | |Instance information page optimization |Supports viewing the minor version information and specification family of an instance on the Instance information page. |2024\-06\-14 |All |[View instances](https://docs.volcengine.com/docs/6899/153369) | |Improved TOS backup and recovery |When creating a TOS backup file recovery task, if database activation is selected for the migration to cloud solution, the system will set the database status to `Online` by default and modify certain parameters of the database. |2024\-06\-14 |All |[Create TOS backup recovery task](https://docs.volcengine.com/docs/6899/805252) | ## April 2024 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Modify the connection address prefix |The RDS for SQL Server console supports modifying the connection address prefix of an instance. |2024\-04\-25 |All |[Modify connection address prefix](https://docs.volcengine.com/docs/6899/226303) | |Supports restoration at the database level |Supports database\-level restoration to a new instance in the RDS for SQL Server console. |2024\-04\-25 |All |* [Restore to a new instance from a backup set](https://docs.volcengine.com/docs/6899/141474)

* [Restore to a new instance by time in point](https://docs.volcengine.com/docs/6899/153379) | |Backup policy optimization |Adjust the default full backup cycle. |2024\-04\-25 |All |[Customize backup policy](https://docs.volcengine.com/docs/6899/153377) | |Supports creating accounts |The RDS for SQL Server console supports using accounts to access and manage databases. |2024\-04\-25 |All |* [Account permission description](https://docs.volcengine.com/docs/6899/1253612)

* [Create and manage accounts](https://docs.volcengine.com/docs/6899/1253611)

* [Modify account permissions](https://docs.volcengine.com/docs/6899/1253613)

* [Reset account password](https://docs.volcengine.com/docs/6899/1253614) | |Create database |You can create databases to store data in the RDS for SQL Server console. |2024\-04\-25 |All |* [Create a database](https://docs.volcengine.com/docs/6899/1253608)

* [Delete a database](https://docs.volcengine.com/docs/6899/1253609) | |TOS backup and recovery supports default recovery. |When creating a TOS backup recovery task, the database is restored by default from the first full backup in the backup file. |2024\-04\-25 |All |[Create TOS backup recovery task](https://docs.volcengine.com/docs/6899/805252) | ## January 2024 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Supports read\-only instances |RDS for SQL Server now supports creating read\-only instances to reduce the read load on the primary instance. When a database has a high volume of read requests and the primary instance cannot handle the combined read and write loads, creating multiple read\-only instances reduces the read load on the primary instance and improves overall system throughput. |2024\-01\-03 |All |* [Read-only instance overview](https://docs.volcengine.com/docs/6899/1186017)

* [Create read-only instance](https://docs.volcengine.com/docs/6899/1188047)

* [View read-only instance connection address](https://docs.volcengine.com/docs/6899/1188063) | |Supports deploying the instance's primay and secondary nodes across availability zones |When creating an instance, RDS for SQL Server supports deploying primary and secondary nodes across availability zones. |2024\-01\-03 |All |* [Create an instance](https://docs.volcengine.com/docs/6899/141335)

* [Restore to a new instance from a backup set](https://docs.volcengine.com/docs/6899/141474)

* [Restore to a new instance by point in time](https://docs.volcengine.com/docs/6899/153379)

* [Rebuild an instance](https://docs.volcengine.com/docs/6899/216082)

* [CreateDBInstance](https://docs.volcengine.com/docs/6899/174605) | 2023 ## December 2023 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Compatible versions now include SQL Server 2019 Enterprise Edition and SQL Server 2019 Web Edition |RDS for SQL Server supports selecting SQL Server 2019 Enterprise Edition or SQL Server 2019 Web Edition as the compatible version when creating an instance. |2023\-12\-07 |All |* [Create an instance](https://docs.volcengine.com/docs/6899/141335)

* [Product specification family](https://docs.volcengine.com/docs/6899/1173859)

* [CreateDBInstance](https://docs.volcengine.com/docs/6899/174605) | |Instance types now include Single node edition and High availability. |RDS for SQL Server supports selecting Single node edition or Cluster edition as the instance type when creating an instance. |2023\-12\-07 |All |* [Create an instance](https://docs.volcengine.com/docs/6899/141335)

* [CreateDBInstance](https://docs.volcengine.com/docs/6899/174605) | |Added support for more node specifications |RDS for SQL Server now supports Enterprise edition and Web edition node specifications. Additionally, the High\-availability Exclusive type of Standard edition now supports 2 cores 16 GiB node specifications. |2023\-12\-07 |All |[Product specification](https://docs.volcengine.com/docs/6899/141341) | ## October 2023 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Download data backup files for a single database |RDS for SQL Server allows you to download the physical backup of a single database directly from an instance backup. |2023\-10\-13 |All |* [Create a manual backup](https://docs.volcengine.com/docs/6899/153378)

* [Download data backup files](https://www.volcengine.com/docs/6899/1116670) | |View the node IPs of the primary and secondary nodes |A node IP is mainly used to establish network connectivity between instances via Elastic Network Interfaces (ENIs), supporting connections through DBLINK for cross\-database queries and operations. |2023\-10\-13 |All |* [View node information](https://docs.volcengine.com/docs/6899/153372)

* [Add linked servers to RDS for SQL Server](https://docs.volcengine.com/docs/6899/1158048) | |Added new product node specifications |RDS for SQL Server has added two new General Type node specifications: rds.mssql.se.ha.d2.2c4g and rds.mssql.se.ha.d4.2c8g. |2023\-10\-13 |All |[Product specification](https://docs.volcengine.com/docs/6899/141341) | |Provide more OpenAPI interfaces |Provides API interfaces for backup and recovery. |2023\-10\-13 |All |* Backup

* [CreateBackup](https://docs.volcengine.com/docs/6899/1131883)

* [DownloadBackup](https://docs.volcengine.com/docs/6899/1158049)

* [DescribeBackups](https://docs.volcengine.com/docs/6899/174609)

* [ModifyBackupPolicy](https://docs.volcengine.com/docs/6899/1131884)

* [DeleteBackup](https://docs.volcengine.com/docs/6899/1131885)

* Restore

* [CreateTosRestore](https://docs.volcengine.com/docs/6899/1131887)

* [RestoreToExistedInstance](https://docs.volcengine.com/docs/6899/1131888)

* [DescribeTosRestoreTasks](https://docs.volcengine.com/docs/6899/1131889)

* [DescribeTosRestoreTaskDetail](https://docs.volcengine.com/docs/6899/1131890) | ## August 2023 |**Feature name** |**Feature description** |**Release time** |**Release region** |**Related documents** | |---|---|---|---|---| |Supports resolving private domain names over the public network via VPN. |Supports resolving the VPC domain name of an instance to a private IP address in a public network environment. |2023\-08\-29 |All |[Enable public network resolution](https://docs.volcengine.com/docs/6899/226318) | |Supports restoring data to an existing instance |Supports restoring data to existing instances by point in time and from a backup set. |2023\-08\-29 |All |* [Restore to an existing instance by point in time](https://docs.volcengine.com/docs/6899/1130119)

* [Restore to an existing instance from a backup set](https://docs.volcengine.com/docs/6899/1130117) | |Backup policy change |The time granularity of the backup time window is changed from 6 hours to 1 hour, allowing for more flexible adjustment of the backup running time. |2023\-08\-29 |All |[Customize backup policy](https://docs.volcengine.com/docs/6899/153377) | ## June 2023 |Feature name |Feature description |Release time | |Related documents | |---|---|---|---|---| |Supports restoring backups via TOS |Supports restoring backups from TOS for fast cloud migration. |2023\-06\-05 |All |[Restore from TOS backup](https://docs.volcengine.com/docs/6899/805250) | |Supports adding tags to instances. |Added support for tagging instances. You can use tags to categorize instances, improving management and resource aggregation. |2023\-06\-05 |All |[Create an instance](https://docs.volcengine.com/docs/6899/141335) | |Add stored procedures |Added a stored procedure to change the database status to Online. |2023\-06\-05 |All |[Modify database status to Online](https://docs.volcengine.com/docs/6899/805235) | |Added an IOPS monitoring item. |Added an IOPS monitoring item to monitor the number of I/O requests processed per second. |2023\-06\-05 |All |[Monitoring Metrics Description](https://docs.volcengine.com/docs/6899/155953) | |Supports displaying requestId in error messages |Added a requestId to error messages for easier problem identification and resolution. |2023\-06\-05 |All |[How do I handle error messages in the RDS for SQL Server console?](https://docs.volcengine.com/docs/6899/805255) | ## April 2023 |Feature name |Feature description |Release time |Release region |Related documents | |---|---|---|---|---| |Integrate with Cloud Monitor Event center |Integrate with Cloud Monitor Event Center to view abnormal events registered by RDS for SQL Server and configure rules to detect issues promptly. |2023\-04\-26 |All |[View events](https://docs.volcengine.com/docs/6899/216085) | |Provide open API |The Open API allows you to query regions, availability zones, instances, backups, and parameters, and create instances. |2023\-04\-24 |All |[API overview](https://docs.volcengine.com/docs/6899/174549) | |Add a new function for elastic public network integration |When enabling public network access, you can use an elastic public IP for better resource elasticity. |2023\-04\-04 |All |[Enable public network access](https://docs.volcengine.com/docs/6899/216080) | |Add Recycle Bin |Added a recycle bin feature. Instances in the recycle bin can be restored. |2023\-04\-04 |All |[Rebuild instance](https://docs.volcengine.com/docs/6899/216082) | |View historical events |The historical event lists records operations on RDS for SQL Server resources. |2023\-04\-04 |All |[View historical events](https://docs.volcengine.com/docs/6899/216084) | |Supports manual switching between primary and secondary nodes |Manually switch between primary and secondary nodes based on business needs. After the switch, the original primary instance becomes the secondary instance, enabling rack\-level disaster recovery. |2023\-04\-04 |All |[Switch to primary node](https://docs.volcengine.com/docs/6899/216182) | |Enable slow query log |You can enable slow query logs and set a threshold. After enabling the slow query log, you can analyze the log files to optimize specific queries. |2023\-04\-04 |All |[Enable slow query log](https://docs.volcengine.com/docs/6899/216184) | |Supports viewing the primary and secondary switchover logs, error logs, and slow query logs of instances. |You can view the active and standby switch log, error log, and slow query log of an instance to gain a more comprehensive understanding of its operational information. You can download the slow query log files for local analysis and targeted optimization. |2023\-04\-04 |All |[Log management](https://docs.volcengine.com/docs/6899/176627) | ## February 2023 |Feature name |Feature description |Release time |Release region |Related documents | |---|---|---|---|---| |Initial product launch |RDS for SQL Server is now available. |2023\-02\-28 |All |[What is RDS for SQL Server?](https://docs.volcengine.com/docs/6899/145666) |