Which local data protection method does ECS use?

Question

Options

• ATriple mirroring and erasure coding
• BErasure coding only
• CDouble mirroring and erasure coding
• DTriple mirroring only

• A
  93% (42)
• B
  2% (1)
• D
  4% (2)

Explanation

ECS (Dell EMC Elastic Cloud Storage) employs both triple mirroring and erasure coding together as its local data protection strategy - triple mirroring protects metadata and small objects by maintaining three full copies across nodes, while erasure coding protects larger objects with greater storage efficiency. Option B fails because erasure coding alone omits the triple mirroring used for metadata and small-object protection. Option C is wrong because ECS specifically uses triple (3-way) mirroring, not double (2-way), which would offer less resilience. Option D is incorrect because relying solely on triple mirroring would be storage-inefficient for large objects, which is why erasure coding complements it.

Memory tip: Think "ECS = Both Extremes" - Triple mirroring for Tiny/metadata, Erasure coding for Enormous objects. The two T's and two E's remind you it's a dual-method system, and the "triple" (not double) rules out option C.

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