API Overview

EVS APIs include APIs and OpenStack Cinder APIs.

A combination of these two types of APIs allows you to use all EVS functions.

**Table 1** API overview
Type	Subtype	Description
API	EVS disk	These APIs provide the functions, such as creating disks, deleting disks, and querying disk details.
OpenStack Cinder API	EVS disk	These APIs provide the functions, such as creating disks, updating disks, querying disks, querying images, and querying quotas.
	EVS disk action	These APIs provide the functions, such as expanding disks, reserving disks, exporting disk data as images, and setting the bootable attribute for disks.
	EVS disk transfer	Through the disk transfer function, disks can be transferred from one tenant to another. After the transfer succeeds, the ownerships of the disks belong to the target tenant only. These APIs provide the functions, such as creating, accepting, deleting, and querying disk transfers.