Updated on 2023-04-27 GMT+08:00

How Do I Select an Image?

When creating an ECS, you can select an image based on the following factors:

Image Type

Images are classified into public images, private images, and shared images. A private image can be a system disk image, data disk image, or full-ECS image. For details, see What Is Image Management Service?

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

    Windows

    • Programs developed for Windows (for example, .NET).
    • Databases such as SQL Server. (You need to install the database.)

    The system disk must be at least 40 GB, and there must be at least 1 GB of memory.

    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.