1. Hardware 1.1 CPU Support for AVX/AVX-512, used for erasure coding computation and SIMD operations Support for AES-NI, used for object encryption Total storage per node Recommended vCPU count Up to 1 TB 8 Up to 10 TB 16 Up to 100 TB 32 Up to 1 PB 64 More

1. top Shows Node Resource Usage Above 100% 1 2 3 4 5 6 kubectl top node NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% master-1 995m 16% 13760Mi 118% master-2 827m 13% 10672Mi 92% master-3 889m 14% 10244Mi 88% This is because usage is computed against allocatable resources by default, which excludes the portion reserved by Kubelet.

1. Using Memory as a Storage Medium The image above is the storage pyramid, showing the relationship between the price of a storage medium and its speed. Today, enterprises widely adopt tape and disks as storage media mainly because of their price advantage. Market prices are driven by supply and demand: even for an expensive storage medium, if the production cost is low, the market is large enough, and the yield rate in the production process is high, its market price will come down.