As the number of PolarDB for MySQL users increases, more and more enterprises need higher database proxy capabilities such as fast, automatic, and elastic scale-out and exclusive use of physical resources. To better meet the requirements of enterprises, Alibaba Cloud will release a new database proxy feature Database Proxy Enterprise Edition around January 7, 2022.

Release date

January 7, 2022

Billing

At present, you can use Database Proxy Enterprise Edition free of charge. In the future, when to charge the fees is to be determined.

Edition switchover policy

The following table describes the switchover policies for PolarProxy Enterprise Edition.

Edition Purchase type Policy
  • Single Node Edition
  • Archive Database Standalone Edition
Single Node Edition and Archive Database Standalone Edition do not support the Database Proxy Enterprise Edition feature regardless of existing or newly purchased instances.
  • Cluster Edition
  • Archive Database Cluster Edition
Newly purchased cluster Newly purchased clusters only support Database Proxy Enterprise Edition.
Existing pay-as-you-go cluster Existing pay-as-you-go clusters are automatically switched to Database Proxy Enterprise Edition.
Existing subscription cluster

Database Proxy Enterprise Editions

The new Database Proxy Enterprise Edition comes with two editions: General-purpose Enterprise Edition and Dedicated Enterprise Edition.
  • Standard Enterprise Edition is used by clusters of the General-purpose General-purpose type of PolarDB for MySQL Cluster Edition, which shares CPU resources with smart elastic scaling within seconds provided based on business loads.
  • Dedicated Enterprise Edition is used by clusters of the Dedicated Dedicated type of PolarDB for MySQL Cluster Edition, which exclusively uses allocated CPU resources and provides better stability.

The following table describes the differences between the previous Database Proxy version and the current Database Proxy Enterprise Edition.

Item Previous version Database Proxy Enterprise Edition
General-purpose Enterprise Edition Dedicated Enterprise Edition
Billing method Free of charge Currently free of charge. In the future, when to charge the fees is to be determined.
Resource type Shared CPU physical resources with no elastic scalability provided Shared CPU physical resources with smart elastic scalability within seconds are provided based on business loads.

The feature of compute node scale-out within seconds is expected to be available from January 2022.

Exclusive use of physical resources with better performance stability provided
Architecture High-availability redundant architecture
Instance type Minimum configuration: 2 cores
Performance In Database Proxy Enterprise Edition, the maximum IOPS of cluster storage is 50% higher than that of the previous edition. For more information about the maximum IOPS of different cluster specifications, see Specifications of compute nodes.

The performance enhancement covers all clusters that you purchased from January 7, 2022. All existing clusters are expected to receive the performance enhancement from February 2022.

Read-only node configuration The configurations must be consistent between the read-only nodes and the primary nodes. The configurations are not necessarily consistent between the read-only nodes and the primary nodes. You can downgrade configurations based on business loads to save costs.

This feature is expected to be available at the end of February 2022.

Number of read-only nodes Up to 15 read-only nodes
Multi-primary architecture Not supported Supported. This feature is expected to be available at the end of March 2022.
Compute node scale-out within seconds Not supported Supported.

This feature is expected to be available from March 2022.

Exclusive use of resources to ensure sufficient resources
Proxy throttling protection Not supported Supported.

This feature is expected to be available at the end of February 2022.

Data masking (for security) Supported
Business stability during configuration change Supported
Endpoint One primary address and seven cluster addresses
Failover between the primary and read-only nodes Interruption of 20 to 30 seconds Connection and transaction not interrupted and brief block of 5 to 10 seconds

This feature is expected to be available at the end of February 2022.

Consistency
  • Eventual consistency
  • Session consistency
  • Global consistency
Connection pool Supported
Transaction splitting Supported
Interruption protection (for connection) Supported