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 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.
- Image Type
- OS