PolarDB:Billing rules for storage

The available storage types vary based on the database edition of the cluster. For information about the storage types available for a cluster of a specific database edition, go to the buy page.

Enhanced SSD (ESSD) AutoPL disks deliver the following performance levels: baseline performance, provisioned performance, and burst performance. The baseline performance of an ESSD AutoPL disk is the same as the performance of an ESSD at performance level 1 (PL1 ESSD) that has the same specifications. For more information, see ESSD AutoPL disks. You can configure the IOPS performance of ESSD AutoPL disks when you purchase a cluster.

If the amount of your business data exceeds the pre-purchased storage space, the processing rules vary based on the storage type.

• ESSDs: do not support auto-scaling. You must use Database Autonomy Service (DAS) to scale up the storage. To prevent your business from being affected due to insufficient storage space, you can manually configure automatic scale-up of Standard Edition storage space. For more information, see Configure automatic storage scale-up for Standard Edition. After you enable automatic scale-up of storage space, the storage space is automatically scaled up when the trigger conditions are met. The payment is deducted from your account upfront based on the scaled-up capacity. If your Alibaba Cloud account does not have sufficient balance to support the scale-up operation, the operation fails.

• PSL4 and PSL5: support auto-scaling based on the actual storage usage. No additional operations are required. You are charged for storage usage that exceeds the subscribed capacity based on the pay-as-you-go billing method. If you purchase storage plans, the excess storage usage is counted against the available capacity in the storage plan first. After the available capacity in the storage plan is exhausted, you are charged based on the pay-as-you-go billing method. For example, you purchase a storage capacity of 100 GB by using the subscription billing method and a storage plan of 50 GB, but have 200 GB of data. For the 100 GB of data that exceeds the purchased storage capacity, 50 GB is offset by the storage plan. You are charged for the remaining 50 GB based on the pay-as-you-go billing method.

The available storage types vary based on the Edition of the cluster. For information about the storage types available for a cluster of a specific edition, go to the buy page.

ESSD AutoPL disks deliver the following performance levels: baseline performance, provisioned performance, and burst performance. The baseline performance of an ESSD AutoPL disk is the same as the performance of an ESSD at performance level 1 (PL1 ESSD) that has the same specifications. For more information, see ESSD AutoPL disks. You can configure the IOPS performance of ESSD AutoPL disks when you purchase a cluster.

If you select the ESSD storage type for a cluster, you must specify the storage capacity. You are charged per GB-hour based on the specified storage capacity. ESSDs does not support auto-scaling. You must use DAS to scale up the storage space. To prevent your business from being affected due to insufficient storage space, you can manually configure automatic scale-up of Standard Edition storage space. For more information, see Configure automatic storage scale-up for Standard Edition. After you enable automatic scale-up of storage space, the storage space is automatically scaled up when the trigger conditions are met. The payment is deducted from your account upfront based on the scaled-up capacity. If your Alibaba Cloud account does not have sufficient balance to support the scale-up operation, the operation fails.

If you select the PSL4 or PSL5 storage type for the cluster, you do not need to specify the storage capacity. The storage capacity automatically scales up as the amount of data increases. You are charged based on your actual storage usage.

The available storage types vary based on the database edition of the cluster. For the storage types available for a cluster of a specific database edition, go to the buy page.

If you select the PSL4 or PSL5 storage type for the cluster, you do not need to specify the storage capacity. The storage capacity automatically scales up as the amount of data increases. You are charged based on your actual storage usage.