SG0-001 · Question #453
In an HSM solution, files are archived to high capacity, high latency disk. To minimize overhead and assure the fastest recall time possible, which of the following should be considered when setting m
The correct answer is A. Larger files should have a higher priority for migration than smaller ones C. Files with the oldest last reference date should have higher priority for migration. To optimize HSM migration policies for minimal overhead and faster recall, prioritize migrating larger files to free up significant primary storage and move files with the oldest last reference dates to high-latency storage.
Question
In an HSM solution, files are archived to high capacity, high latency disk. To minimize overhead and assure the fastest recall time possible, which of the following should be considered when setting migration policy? (Select TWO).
Options
- ALarger files should have a higher priority for migration than smaller ones
- BFiles with the oldest creation date should be migrated first
- CFiles with the oldest last reference date should have higher priority for migration
- DIf data criteria are identical, smaller files should be migrated first
- EThe least referenced files should have higher priority for migration
How the community answered
(32 responses)- A69% (22)
- B19% (6)
- D3% (1)
- E9% (3)
Why each option
To optimize HSM migration policies for minimal overhead and faster recall, prioritize migrating larger files to free up significant primary storage and move files with the oldest last reference dates to high-latency storage.
Migrating larger files first frees up a greater amount of primary storage space per migration operation, reducing the frequency of migrations and optimizing the use of the high-performance tier.
The creation date does not indicate how frequently a file is accessed; an old file might still be actively used and frequently recalled if migrated.
Files with the oldest last reference date are the least recently accessed, making them ideal candidates for migration to high-latency storage as they are less likely to be recalled soon, thus minimizing recall overhead.
Migrating smaller files first would free up less primary storage space per migration, leading to more frequent migration cycles and potentially higher overhead.
While migrating least referenced files is the goal, 'oldest last reference date' (choice C) provides a more specific and measurable criterion for determining file inactivity than the general term 'least referenced files'.
Concept tested: HSM migration policy optimization
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