How Do I Select an Image?

Image Type

Images are classified into public, private, and shared images.

You can select an image as follows:

• If you only need an OS, select a public image.
• If you want to clone an existing ECS, select a private image.
• If you want to use an image shared by others, select a shared image.

Image Fee

You may be billed for using an image. For details, see What Are the Billing Standards of IMS?

OS

When selecting an OS, consider the following factors:

• Architecture types

  System Architecture	Applicable Memory	Constraints
  32-bit	Smaller than 4 GB	If the instance memory is greater than 4 GB, a 32-bit OS cannot be used. A 32-bit OS only allows addressing within a 4 GB memory range. An OS with more than 4 GB memory cannot be accessed.
  64-bit	4 GB or larger	If your application requires more than 4 GB of memory or the memory may need to be expanded to more than 4 GB, use a 64-bit OS.

• OS types

  OS Type	Applicable Scenario	Constraints
  Linux	High-performance server applications (for example, Web) and working with common programming languages such as PHP and Python. Databases such as MySQL. (You need to install the database.)	The system disk must be at least 40 GB, and there must be at least 512 MB of memory.