Automatic elastic CUs
MaxCompute automatic elastic CUs use a pay-as-you-go billing model to scale compute resources on demand based on real-time workload changes. You pay only for the CUs you actually use, billed hourly.
Resource description
Automatic elastic CUs
Description:
Beyond subscription and flexible reserved resources, the system automatically scales CUs up or down based on workload fluctuations to match job demands.
One CU is equivalent to 4 GB of memory and 1 CPU core.
Billing:
Billed hourly based on usage volume and duration for the automatic elastic CUs that you use. Compute fees (hourly billing).
Compare automatic elastic, subscription reserved, and flexible reserved CUs in the Function Overview.
Usage notes
You must purchase subscription compute resources before you can configure and use the automatic scaling feature.
The automatic scaling feature is supported for both batch processing and interactive quotas.
When you enable automatic scaling, you must set a maximum CU value that meets your business needs to control costs. The system automatically scales resources within this limit and bills you for the actual number of automatically scaled CUs used.
The automatic scaling capability of MaxCompute is subject to the availability of real-time resources.
The system makes a best effort to meet the maximum limit that you set for automatic scaling but cannot guarantee that the limit can always be reached. If your business requires guaranteed resources, configure elastic reserved CUs at the same time. These resources are reserved for you according to the time plan that you set. For burst demands that far exceed historical levels, such as during holiday sales promotions, contact us in advance to ensure a sufficient resource supply.
Usage instructions
For steps to activate subscription instances, see Activate MaxCompute.
After you purchase a subscription instance, configure a quota on the Quotas page in the MaxCompute console and set the automatic elastic CU limit. Computing Resources - Quota Management.
After you set the automatic elastic CU limit, follow Use compute resources (quotas) to start using the quota.
Best practices for using automatic elasticity provides a complete walkthrough.