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AZ See Available Zone E Elastic Volume Service Elastic Volume Service (EVS) disks are a type of virtual block storage devices that use the distributed architecture and can be elastically expanded. You can operate EVS disks online.
Procedure The capacity of an EVS disk can be expanded in either of the following ways: Apply for an EVS disk and attach it to an ECS. Expand the capacity of an existing EVS disk. The capacities of both system disks and data disks can be expanded.
Adding an EVS Disk Application Scenario Create an EVS disk and attach it to the ECS.
Querying Details About an EVS Snapshot Function This API is used to query details about an EVS snapshot. Calling Method For details, see Calling APIs.
Querying Details About EVS Snapshots Function This API is used to query details about EVS snapshots. Calling Method For details, see Calling APIs.
Setting Read-Only Flag for an EVS Disk Function This API is used to set the read-only flag for an EVS disk. Calling Method For details, see Calling APIs.
Querying Details of an EVS Disk Transfer Function This API is used to query the details of an EVS disk transfer, including the transfer creation time, transfer ID, and transfer name. Calling Method For details, see Calling APIs.
For details about EVS billing, see Billing for EVS Disks. Parent Topic: Expanding the EVS Disk Capacity
Deleting an EVS Disk Transfer Function This API is used to delete a disk transfer. A disk transfer can be deleted if it is not accepted. Accepted disk transfers cannot be deleted. Calling Method For details, see Calling APIs.
Querying All EVS Disk Transfers Function This API is used to query all EVS disk transfers of the current tenant. Calling Method For details, see Calling APIs.
Querying Details About an EVS Disk Function This API is used to query details about an EVS disk. Calling Method For details, see Calling APIs.
Creating EVS Disks (Deprecated) Function This API is used to create one or multiple EVS disks. This API call exists for compatibility reasons only and is not meant to be used. Use another API. Calling Method For details, see Calling APIs.
Parent Topic: EVS Volumes
Unsubscribing from Yearly/Monthly EVS Disks Function This API is used to unsubscribe from yearly/monthly EVS disks. It has the following constraints: It cannot be used to unsubscribe from system disks and bootable disks.
EVS Events Supported by Event Monitoring Table 1 Supported EVS events Event Source Namespace Event Name Event ID Event Severity Description Handling Suggestion Impact EVS SYS.EVS Update disk updateVolume Minor Update the name and description of an EVS disk.
Querying EVS Disks (Deprecated) Function This API is used to query all EVS disks. This API has been deprecated. Use another API. Calling Method For details, see Calling APIs.
Querying Details About an EVS Disk Type Function This API is used to query details about an EVS disk type. Calling Method For details, see Calling APIs.
If the original capacity of an EVS disk is 4096 GB, the disk capacity cannot be expanded. After the instance is stopped, the expanded capacity still takes effect. The billing is based on the expanded EVS disk capacity. An EVS disk is billed as long as it is used.
Parent Topic: Managing EVS Disks
Querying the EVS Capacity Function Query the total, allocated, and remaining quantities of physical storage servers used by the EVS service.
