Two compute nodes plus four storage nodes require far more than six 25 GE links per switch (typically at least one, and usually two, 25 GE ports per node). Therefore, allocating only four - six 25 GE ports on each switch is insufficient.

The back-end storage network in DPC scenarios is primarily used for storage node communication and data access, not for communication between compute nodes and the Object Storage Device (OSD). Compute nodes typically communicate with storage nodes over the service network, making the statement about the back-end network serving that role false.

In Huawei flash storage, the space management layer handles metadata and logical space allocation. Therefore, its performance concerns include the cache hit ratio of hot metadata and the CPU usage of metadata background management, as both directly affect metadata access efficiency and system responsiveness.

The correct procedure is to power on the cabinet first to supply power to all devices within it, then power on individual devices. Powering on devices before the cabinet is powered can cause hardware and operational issues.