HAT-420 · Question #23
A customer has multiple cache partitions defined on a Hitachi Unified Storage system. They would like to change one of the partitions characteristics. Which three settings can be modified? (Choose…
On Hitachi Unified Storage systems, cache size (B), segment size (C), and owning controller (E) are the three partition characteristics that can be modified after creation. Cache size can be adjusted to allocate more or less cache to a partition as workload demands change…
Question
A customer has multiple cache partitions defined on a Hitachi Unified Storage system. They would like to change one of the partitions characteristics. Which three settings can be modified? (Choose three.)
Options
- Astripe size
- Bcache size
- Csegment size
- Dpartition number
- Eowning controller
Explanation
On Hitachi Unified Storage systems, cache size (B), segment size (C), and owning controller (E) are the three partition characteristics that can be modified after creation. Cache size can be adjusted to allocate more or less cache to a partition as workload demands change; segment size controls the granularity of cache allocation and can be tuned for performance; and the owning controller can be reassigned to balance load or accommodate hardware changes.
Stripe size (A) is a structural parameter set at partition creation and defines how data is distributed - changing it would require recreating the partition entirely. Partition number (D) is simply a fixed system identifier used to reference the partition and cannot be reassigned.
Memory tip: Think "BSE - Before Scrapping Everything" - Bache size, Segment size (C), and Eowning controller are the three you can tune on the fly. Stripe size and partition number are "born fixed."
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