An image is used to create ECSs and consists of a common operating system (OS), preinstalled public applications, and the user's private applications. Image Management Service (IMS) transforms the image services previously provided by IT administrators into custom services that allow for self-service. IMS allows you to create, edit, upload, and delete images.
You can use a web-based management console to provision ECSs using private images. With IMS, you can quickly provision a large number of ECSs in batches, accelerating service rollout and simplifying service O&M.