Assume a financial customer purchased several Huawei scale-out storage devices for deploying the video surveillance service. This service has high…

The cache write policy for Huawei scale-out storage, like OceanStor Pacific, is critical for

performance-sensitive applications like video surveillance. The *HCIP-Storage V5.5 Training Material

(Module 4: Storage Design and Implementation)* states: “For video surveillance, which involves

sequential large I/O writes, the write-back cache policy is recommended to maximize performance

by buffering writes and reducing disk I/O latency. Write-through, which writes directly to disks, is less

suitable due to higher latency.” The statement’s insistence on write-through for high-performance

video surveillance is incorrect, as write-back is preferred, making the statement false.

Reference:

HCIP-Storage V5.5 Training Material, Module 4: Storage Design and Implementation, Section 4.8:

Cache Policy Configuration*, Huawei Technologies Co., Ltd.

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