Overview

Public images

A public image is a widely used, standard image. It contains an OS and pre-installed public applications and is visible to all users. Public images are very stable and their OS and any included software have been officially authorized for use. If a public image does not contain the environments or software you need, you can use a public image to create a cloud server and then deploy the required environments or software on the server.

You can install applications based on your service requirements. If you are familiar with system and application environment configurations, select a public image.

Private images

A private image is created by yourself. A private image can be a system disk image, data disk image, or full-server image.

• A system disk image contains an OS and preinstalled software for various services. You can use a system disk image to create a cloud server and migrate your services to the cloud.
• A data disk image contains only service data. You can use a data disk image to create EVS disks and use them to migrate your service data to the cloud.
• A full-server image contains an OS, pre-installed application software, and service data. It is created using differential backups and the creation takes less time than creating a system or data disk image that has the same disk capacity.

You can use a private image to quickly create FlexusX instances with the same configurations as the private image, eliminating the need to configure multiple FlexusX instances repeatedly. For more information, see Creating a FlexusX Instance from a Private Image or Using a Private Image to Change the OS.

Shared images

A shared image is a private image shared by another user with you. For more information, see Sharing Images.