When you create a cloud computer, you can use a cloud computer template to specify the specifications that meet your business requirements. By default, cloud computers of the Enterprise Graphics type or High Frequency type use enhanced SSDs (ESSDs). You can specify the disk capacity and performance level (PL) of an ESSD. In actual business scenarios, you can also change the PL of a system disk or data disk. This topic describes how to change the PL of an ESSD.
Background information
Performance level (PL)
Alibaba Cloud disks are block storage devices that feature low latency, high performance, robust data persistence, and high reliability. For more information, see Disks.
By default, Enterprise Graphics and High Frequency cloud computers provided by WUYING Workspace (Pro Edition) use enhanced SSDs (ESSDs). ESSDs are a type of cloud disks that are developed based on the next-generation distributed block storage architecture and provide ultra-high performance. ESSDs incorporate the 25 Gigabit Ethernet and remote direct memory access (RDMA) technologies. A single ESSD can provide up to 1,000,000 random read/write IOPS and reduced one-way latency. For more information, see ESSDs.
PL | Maximum IOPS per ESSD | Applicable capacity scope |
PL0 | 10,000 | 20 GiB to 32 TiB |
PL1 | 50,000 | 20 GiB to 32 TiB |
PL2 | 100,000 | 461 GiB to 32 TiB |
PL3 | 1,000,000 | 1261 GiB to 32 TiB |
Limits on the PL change operation
The following table descirbes the limits on upgrading and downgrading ESSD PLs.
Source ESSD PL
Supported operation
PL0
You can upgrade a PL0 ESSD to a PL1, PL2, or PL3 ESSD.
PL1, PL2, and PL3
If the source ESSD is billed on a pay-as-you-go basis and is of one of PL1, PL2, and PL3, you can upgrade the source ESSD to an ESSD of any other two PLs.
If the source ESSD is billed on a subscription basis, you can upgrade the source ESSD from the current PL to a higher PL.
You can use an Alibaba Cloud account to execute up to five PL change tasks at the same time in a region. If the number of tasks is greater than five, the excess tasks wait in a queue.
Your storage size determines whether you can use an ESSD of the desired PL. For example, the minimum storage size of a PL0 ESSD is 20 GiB and that of a PL3 ESSD is 1,261 GiB. If your storage size cannot reach the minimum storage size of an ESSD of the desired PL, you cannot upgrade your ESSD of the current PL to an ESSD of the desired PL. We recommend that you scale up the size of an ESSD before you change the current PL of the ESSD to another PL. For information about how to scale up the size of an ESSD, see Scale up the partition of a data disk.
PL change impacts
During the change process, your ESSD may not provide stable performance. We recommend that you perform the change operation during off-peak hours.
During the change process, end users can use the cloud computer of the ESSD as expected.
The change operation may take several hours to complete. The actual amount of time consumed by the change operation varies based on the read/write IOPS, size, and category of your ESSD. After you execute a PL change task, you can go to the WUYING Workspace Pro Edition console to view the change progress.
During the change process, you cannot perform the following operations:
Cancel the change task
Change the ESSD PL
Create snapshots
Scale up the ESSD
Partition and format the ESSD
Re-initialize the ESSD
Mount or unmount the ESSD
Roll back the ESSD by using a snapshot
Change the OS if the ESSD is used as a system disk
In rare cases, the change operation may fail due to resource issues. If the change operation fails, try again later.
Billing
The billing method of an ESSD does not change after you change the PL of the ESSD. Take note of the following billing rules:
If you want to change the PL of a subscription ESSD mounted to a subscription cloud computer, the billing method of the ESSD is still subscription, and you are charged based on the price difference within the subscription duration after the change is complete.
If you want to change the PL of a pay-as-you-go ESSD mounted to a pay-as-you-go cloud computer, the billing method of the ESSD is still pay-as-you-go, and you are charged based on the price of the ESSD of the new PL after the change is complete.
For information about the ESSD pricing, see Block storage devices.
Prerequisites
A cloud computer that is in the Running or Stopped state exists.
The cloud computer is of the Enterprise Graphics or High Frequency type. For more information, see Create cloud computers.
(Recommended) A snapshot is created to back up data of the ESSD. For more information, see Use snapshots (public preview).
Procedure
Log on to the WUYING Workspace (Pro Edition) console.
In the left-side navigation pane, choose .
In the upper-left corner of the top navigation bar, select a region.
On the Cloud Computers page, find the desired cloud computer and click the ⋮ icon in the Actions column. Then, select Change Disk Configuration.
In the Change Disk Configuration dialog box, click Upgrade/Downgrade in the Actions column and select the desired PL for the system disk or data disk that is an ESSD.
Check the bill and click Confirm.
During the change process, the cloud computer of the ESSD enters the Changing state on the Cloud Computers page. After the change operation is complete, the cloud computer restores to the previous state.