Which of the following is not part of Huawei Cloud's storage scalability design?

Question

Options

• AUnlimited capacity of OBS
• BSFS elastic expansion
• CEVS online expansion
• DDDM horizontal expansion

• A
  4% (1)
• B
  4% (1)
• C
  13% (3)
• D
  79% (19)

Explanation

DDM (Distributed Database Middleware) is the odd one out because it belongs to Huawei Cloud's database category, not storage. DDM's horizontal expansion refers to database sharding and read/write splitting across MySQL-compatible nodes - a database scalability pattern, not a storage one.

The three distractors are all genuine storage scalability features:

• A (OBS) - Object Storage Service offers virtually unlimited capacity, scaling automatically as objects are added.
• B (SFS) - Scalable File Service supports elastic expansion, growing file system capacity on demand without downtime.
• C (EVS) - Elastic Volume Service supports online (hot) expansion, letting you increase block storage volume size while the disk remains attached and in use.

Memory tip: Group by service type - OBS/SFS/EVS are all storage services (think "files, blocks, objects"). DDM has "Database" right in its name, so whenever you see it in a storage question, it's the imposter.

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