Help Center/ Distributed Database Middleware/ What's New

What's New

Updated on 2023/10/10 GMT+08:00
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The tables below describe the functions released in each Distributed Database Middleware version and corresponding documentation updates. New features will be successively launched in each region.

September 2023

No.

Feature

Description

Phase

Document

1

Dedicated execution node type.

If you select Dedicated for Execution Node Type, the execution node will be dedicated to configuring shards, so shard configuration is faster.

Commercial use

Operation Guide

March 2023

No.

Feature

Description

Phase

Document

1

Upgrading and rolling back kernel versions.

A DDM kernel version usually consists of four digits, for example, 3.0.8.x. The first three digits indicate the major version number, for example, 3.0.8. A series of minor versions will be released for each major version. The preferred version of this DDM series is a recommended minor version. It is also the latest and the most stable version. For DDM instances of the same major version, upgrading the kernel version to this preferred version is a minor version upgrade. This operation involves issue rectification and has a low risk of syntax incompatibility. You are advised to upgrade your instance to the preferred version.

Commercial use

Upgrading the Version of a DDM Instance

Rolling Back the Version of a DDM Instance

February 2023

No.

Feature

Description

Phase

Document

1

Manually enabling read/write splitting.

DDM optimizes its read/write splitting function. In earlier versions, read/write splitting is automatically enabled after read replicas are added. From this version on, read/write splitting needs to be manually enabled after read replicas are added, and you can set read weights for your primary instance and read replicas.

Commercial use

Configuring Read/Write Splitting

January 2023

No.

Feature

Description

Phase

Document

1

Online DDL operations.

DDM supports online DDL operations, including adding, deleting, and modifying fields, setting default values, and modifying character sets and table names.

Commercial use

Online DDL

August 2022

No.

Feature

Description

Phase

Document

1

New APIs.

New APIs are added, including the APIs used for changing the node class of a DDM instance, managing administrator passwords, and validating password strength.

Commercial use

Changing the Node Class of a DDM Instance

Managing the Administrator Password

Validating Password Strength

April 2022

No.

Feature

Description

Phase

Document

1

Specifying a shard using a hint during SQL execution is supported

You can specify a shard using a hint when you execute SQL statements.

Commercial use

Specifying a Shard Using a Hint When Executing a SQL Statement

February 2022

No.

Feature

Description

Phase

Document

1

Restoring metadata is supported

When you delete a schema by mistake or your RDS for MySQL instance becomes abnormal, metadata restoration allows you to restore your DDM instance metadata and match the metadata with the RDS instance that has PITR completed to re-establish the relationship between your DDM instance and RDS instance. The metadata restoration supports only RDS for MySQL.

Commercial use

Restoring Metadata

January 2022

No.

Feature

Description

Phase

Document

1

Data node management is supported

Managing data nodes is managing RDS for MySQL or GaussDB(for MySQL) instances that are associated with your DDM instance. You can view the instance status, storage, class, and read weight, configure read weights, and create read replicas on the data node management page.

Commercial use

Data Node Management

November 2021

No.

Feature

Description

Phase

Document

1

Restarting a node is supported

You can restart a node of a DDM instance.

Commercial use

Restarting a Node

October 2021

No.

Feature

Description

Phase

Document

1

Binding and unbinding an EIP is supported

You can bind an EIP to a DDM instance for public access and then unbind the EIP when public access is no longer required.

Commercial use

Binding and Unbinding an EIP

2

Modifying the floating IP address of a DDM instance or a group is supported

After load balancing is enabled for DDM, you can modify the floating IP addresses of your DDM instance and groups.

Commercial use

Modifying the Floating IP Address of a DDM Instance and a Group

January 2021

No.

Feature

Description

Phase

Document

1

Syntax for creating tables

Four table creation syntaxes are added.

Commercial use

Creating a Table

December 2020

No.

Feature

Description

Phase

Document

1

Global sequence

Global sequence information is added.

Commercial use

Global Sequence

November 2020

No.

Feature

Description

Phase

Document

1

SQL compatibility

Prerequisites of some SQL compatibility statements are modified.

Commercial use

SQL Compatibility

2

Connecting to a DDM instance

Getting Started contents are modified and methods of connecting to DDM instances or schemas are added.

Commercial use

Connecting to a DDM Instance

October 2020

No.

Feature

Description

Phase

Document

1

RDS-related questions

FAQs about RDS are added.

Commercial use

RDS-related Questions

2

Procedure of using DDM

Procedures for using DDM and connecting to DDM instances are updated.

Commercial use

Scenario-based description in Getting Started

3

Network access constraints

Product functions and network access constraints are updated.

Commercial use

Network Access

September 2020

No.

Feature

Description

Phase

Document

1

Compute resource scale-in

Parameter configuration management is updated and compute scale-in and data migration are added.

Commercial use

Scaling In a DDM Instance

2

Application scenarios

Product specifications and application scenarios are updated.

Commercial use

Application Scenarios

August 2020

No.

Feature

Description

Phase

Document

1

Permissions management in User Guide

SQL compatibility and permissions management are added in User Guide.

Commercial use

Permissions Management

2

Buying a DDM instance

Procedure and description about how to buy a DDM instance are updated.

Commercial use

Buying a DDM Instance

3

Permissions management in Product Overview

Permissions management in Product Overview is updated.

Commercial use

Permissions Management

June 2020

No.

Feature

Description

Phase

Document

1

Storage scaling

Added descriptions about storage scaling methods, rebalancing and resharding.

Commercial use

Scaling Out a Schema

May 2020

No.

Feature

Description

Phase

Document

1

Release of Distributed Database Middleware

This issue is the first official release.

Commercial use

-

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