After you enable the I/O burst feature of general ESSDs for an ApsaraDB RDS for MySQL instance, the IOPS of general ESSDs is no longer limited by the maximum IOPS. This improves the I/O performance of the RDS instance to handle workload bursts during peak hours, and you do not need to expand the storage capacity. To optimize I/O performance, you can upgrade ESSDs of any performance level (PL) to general ESSDs. This topic describes how to change the storage type of an RDS instance from ESSD to general ESSD.
Prerequisites
The storage type of the RDS instance is ESSD.
Impacts
When you change the storage type of an RDS instance from ESSD to general ESSD, the change immediately takes effect and causes no transient connections. In most cases, your workloads are not adversely affected. In some cases, the IOPS of the RDS instance may fluctuate. We recommend that you perform this operation during off-peak hours.
Usage notes
The storage type change from ESSD to general ESSD takes effect based on the RDS edition of an RDS instance. If the RDS instance runs RDS Cluster Edition, the change takes effect on all primary and secondary nodes in the RDS cluster. If the RDS instance runs RDS High-availability Edition, the change takes effect on the primary and secondary RDS instances. If the RDS instance runs RDS Basic Edition, the change takes effect on the RDS instance. The change does not affect the storage types of read-only RDS instances. To change the storage type of a read-only RDS instance, go to the instance details page to perform the required operations.
When you change the storage type from ESSD to general ESSD, you can configure only the I/O burst feature. Other configurations cannot be modified.
After you change the storage type from ESSD to general ESSD, you cannot change the storage type to another type. Proceed with caution.
Before you change the storage type from ESSD to general ESSD, make sure that no backup tasks are in progress for the RDS instance. If backup tasks are in progress, the time that is required to change the storage type is prolonged.
Billing rules
The unit prices of an ESSD and a general ESSD are different. ESSDs come in the following PLs: PL1, PL2, and PL3. The price difference for the storage type change is displayed on the Change Specifications page.
Within a specific period of time, if an RDS instance handles a large number of I/O operations for a shorter period of time, general ESSDs are more cost-effective than PL1 ESSDs, PL2 ESSDs, and PL3 ESSDs.
General ESSD fee = Fee for the storage capacity that you purchase for your RDS instance + I/O burst fee + I/O acceleration fee + Data archiving fee For more information, see What are general ESSDs?
Procedure
Log on to the ApsaraDB RDS console and go to the Instances page. In the top navigation bar, select the region in which your RDS instance resides. Then, find the RDS instance and click the ID of the RDS instance.
In the Basic Information section of the page that appears, click Upgrade Storage Type to the right of Storage Type.
On the Change Specifications page, select General ESSD for Storage Type. Then, read and select Terms of Service and click Pay Now to complete the payment.
NoteYou can turn on I/O Burst. By default, the feature is disabled. For more information about the feature, see Use the I/O burst feature of general ESSDs.
The status of the RDS instance changes to Upgrading. When the status of the RDS instance changes to Running, the upgrade is complete.
After you change the storage type of an instance to general ESSD, you can enable the I/O acceleration and data archiving features in the Basic Information section of the instance details page. For more information about how to enable the features, see Enable the I/O acceleration feature and Enable the data archiving feature.
References
Related operations
Operation | Description |
When you change the storage type of an RDS instance from ESSD to general ESSD, take note of the following items:
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