Assume a financial customer purchased several Huawei scale-out storage devices for deploying the video surveillance service. This service has high requirements on performance. Therefore, the cache write policy must be set to write-through for the storage devices.

Write-through commits every write directly to disk, adding latency and lowering bandwidth. Huawei scale-out storage best-practice documents for video-surveillance recommend Write-Back (cached) mode to satisfy the high-performance, high-bandwidth nature of continuous video recording; therefore insisting on write-through is incorrect.

A (Yes/True). Video-surveillance workloads would suffer performance loss with write-through, so the statement cannot be true.

1. Huawei, “Video Surveillance Solution Best Practices for OceanStor Scale-out Storage”, Issue 02 (2022-05-20), §3.2 Cache Policy, pp.18-19.

2. Huawei, “OceanStor 100D Product Documentation”, V500R022, §4.6 Cache Write Policies, p.67.