This section describes the constraints on using CCI 2.0.

The following table lists the constraints on CCI 2.0.

Item	Constraint
Account for creating CCI instances	The account must have complete real-name authentication.
Number of vCPUs per CCI instance	0.25, 0.5, 1, 2, 4, 8, 16, 32, 48, and 64
Supported OS	Only Linux
Network type	Only VPC

The following table lists the pod flavors.

**Table 1** Requirements on pod flavors
Item	Value Range
Number of vCPUs	0.25, 0.5, 1, 2, 4, 8, 16, 32, 48, and 64
Memory	1 GiB to 512 GiB The memory must be an integer multiple of 1 GiB.
vCPU/memory ratio	Between 1:1 and 1:8
Containers in a pod	A maximum of five containers A single container has as few as 0.25 vCPUs and 0.5 GiB of memory. The maximum resource flavor of a container is the same as that of a pod.

If no EVS disk is mounted, application data is stored in the rootfs of the container. The following table lists the storage space limit of each pod.

**Table 2** Storage space limit of each type of pod
Pod Type	Storage Space
General-computing pod	30 GB