Answers to common questions about ApsaraDB MyBase.
Dedicated cluster limitations at a glance
The following table summarizes the operations that are not supported in a dedicated cluster:
| Operation | Supported | Notes |
|---|---|---|
| Stop an instance | No | Releasing an instance is supported instead |
| Migrate an existing pay-as-you-go or subscription instance to a cluster | No | Will be available in later versions |
| Access secondary instances | No | Secondary instances serve as backups only |
| Create a cluster that spans multiple regions | No | All hosts in a cluster reside in one region |
FAQ
What is ApsaraDB MyBase? How does it differ from ApsaraDB RDS?
ApsaraDB MyBase is a dedicated-cluster database service built on physical hosts — including Elastic Compute Service (ECS) i2 instances and ECS Bare Metal instances. For architecture details, see Terms.
Instances created in a MyBase dedicated cluster inherit all capabilities of standard ApsaraDB RDS instances and provide additional benefits. For details, see Mechanisms and benefits.
Can I access secondary instances?
No. Only primary instances are accessible. Secondary instances serve as backups only and do not process user requests.
Can I stop an instance in a dedicated cluster?
No. Stopping an instance is not supported. Releasing an instance is supported, but released instances cannot be recovered — all data is permanently deleted.
Before releasing an instance:
Download and save the backup file.
Verify that the backup file is valid.
Confirm that the instance is not in use.
For release steps, see Release or unsubscribe from an ApsaraDB RDS for MySQL instance.
Are all hosts in a dedicated cluster in the same region?
Yes. All hosts in an ApsaraDB MyBase dedicated cluster reside in a single region. Dedicated clusters that span multiple regions are not supported.
Can I choose which host an instance is created on?
Yes. When creating an ApsaraDB RDS for MySQL instance, you can specify the target host. If you don't specify one, the system assigns the instance to a host based on the configured resource allocation policy. For details, see Create an ApsaraDB MyBase for MySQL instance.
The dedicated cluster creation wizard fails in Microsoft Edge. What should I do?
Use Google Chrome. The cluster creation wizard is not compatible with Microsoft Edge.
Can I log on to and manage hosts directly?
Yes. Apply for a host account and log on through Bastionhost to perform host-level operations.
Can I migrate an existing pay-as-you-go or subscription instance to a dedicated cluster?
No. Migrating existing instances to a dedicated cluster host is not currently supported. This feature will be available in later versions.
Which database engines support storage plans?
Dedicated clusters that run the following engines support storage plans:
| Engine | Dedicated cluster | Regular database |
|---|---|---|
| ApsaraDB RDS for MySQL | Yes | Yes |
| ApsaraDB RDS for SQL Server | Yes | Yes |
| ApsaraDB RDS for PostgreSQL | Yes | Yes |
Regular databases that support storage plans also include ApsaraDB for HBase.
For more information, see the ApsaraDB RDS documentation.
Billing
Q: My host is on a subscription. Why are there other charges?
A: If the hosts of a MyBase dedicated cluster use cloud disks, your subscription fee covers only the CPU and memory of the hosts. The required storage space is determined when you deploy a database instance, and the cloud disk storage is charged separately at that time. If the hosts of a MyBase dedicated cluster use local disks, no additional fees are charged when you deploy an instance.
Why am I charged extra for instances on a subscription host?
It depends on the storage type configured for the hosts:
| Host storage type | Subscription fee covers | Instance creation charges |
|---|---|---|
| Enhanced SSD | CPU and memory only | Storage space charged separately |
| Local SSD | CPU, memory, and storage | No additional charge |
If hosts use enhanced SSDs, storage is billed separately each time you create an instance. If hosts use local SSDs, the subscription fee covers everything.