• CPU: the CPU model of the expansion hosts and the current cluster hosts should not exceed a difference of 3 generations.

• Memory size and memory model: When expanding memory modules, the size and model of the expanded memory modules should remain consistent with those of the original hosts. The frequency and size of memory on the same host should be consistent.

• Network card information: In scenarios involving expansion hosts and expansion network cards, the network card configuration of the expansion hosts should be confirmed based on the current usage of the network cards.