Instance purchase restrictions

1. A maximum of 20 instances can be purchased at a time.

Instance configuration restrictions

1. CPU supports 1 core, 2 core, 4 core and 8 core.
   Memory supports 1G, 2G, 4G, 8G, 16G, 32G.
   The resource ratio of CPU and memory is 1:2; 1：4。
2. The local SSD data disk is at least 5GB and at most 500GB. Refer to the example for specific configuration.