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Huawei H19-308_V4.0 Exam - Topic 7 Question 8 Discussion
Topic #: 7
With adaptive data locality rearrangement on writes, the data dispersion is calculated in real time when backup data is written and data distribution on disks is adjusted. During backup data recovery, only a few sequential reads are required, improving HDD recovery performance.
The statement accurately describes Huawei's Adaptive Data Locality Rearrangement technology used in OceanProtect systems. Backup data is often deduplicated and compressed, which traditionally leads to high data fragmentation (dispersion) across physical disks. When it comes time to recover that data, the disk heads on an HDD would normally have to perform thousands of 'seek' operations to find the scattered blocks, resulting in very slow recovery speeds.
Huawei solves this by calculating the data dispersion in real-time during the write process. The system intelligently rearranges and groups related data blocks together on the disk media. Because the data is stored in a physically optimized, sequential manner, the recovery process can utilize sequential reads rather than random reads. This allows OceanProtect to deliver recovery performance that is significantly higher than traditional backup appliances, ensuring that businesses can restore services rapidly after an outage or data loss event.
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