Which statement about the Dorado's global garbage collection (GC) are correct? (Multiple choice)

Question

Options

• ADorado supports intelligent adjustment of multiple GC levels based on the garbage percentage
• BWhen a conflict cocurs, user I/Os and metadata always have a higher priority than GC.
• CGlobal GC issues TRIM commands to trigger GC on SSDs.

• A
  100% (31)

Explanation

All three statements are correct, so there are no distractors to refute - the challenge here is understanding why each one is true.

A is correct because Dorado dynamically adjusts GC aggressiveness across multiple levels (e.g., light, moderate, heavy) based on the current ratio of invalid/garbage blocks, balancing cleanup efficiency against system load. B is correct because GC is a background maintenance task; Dorado's scheduler enforces that user I/Os and metadata operations always preempt GC work during resource contention, protecting application performance. C is correct because Dorado's global GC issues TRIM (or UNMAP) commands to the underlying SSDs, notifying them which logical blocks are stale so the drives' internal firmware can erase and reclaim those cells during their own idle cycles.

Memory tip: Think of Dorado's GC as a "courteous janitor" - it adapts its cleaning intensity (A), steps aside when real work arrives (B), and signals the SSD to handle the physical erasing itself rather than doing it directly (C). If you see all three concepts on an exam, remember the acronym ABS: Adaptive levels, Background priority, Signal via TRIM.

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