Instance purchase restrictions

1. To purchase ECS, you need to register and pass real name authentication.
2. A maximum of 20 instances can be purchased at a time.

Instance configuration restrictions

1. CPU supports 1 core, 2 core, 4 core, 8 core and 16 core.
   Memory supports 1G, 2G, 4G, 8G, 16G, 32G, 64G.
   The resource ratio of CPU and memory is 1:1; 1：2； 1：4； 1：8。
2. The SSD data disk is at least 10GB, and the maximum is 1000GB. A maximum of 5 data disks can be added.
   Note: Adding a data disk does not support uninstalling

Instance usage restrictions and suggestions

1. The memory is less than 2G, and the Windows Server 2016 version image cannot be installed.
2. If you need to use Windows Server type images, it is recommended that you purchase instances with more than 2GB of memory to reduce the jam.