Compared with cloud database RDS, Huawei's self-developed database GaussDB has many advantages over cloud database RDS in terms of system architecture and other aspects. Which of the following…

Question

Options

• AThere is no longer a standby database, and all read-only databases are in the Active state. And
• BAll update operations are only logged, and Double write is no longer required. Reduced valuable
• CWith multiple storages, when the access volume is large, the read and write performance of the
• DThere is only one copy of storage, no need to purchase additional storage. If there are more read-

• A
  2% (1)
• B
  12% (5)
• C
  80% (33)
• D
  5% (2)

Explanation

Option C is the wrong description because GaussDB does not use multiple separate storage units. Its defining architectural feature is a single shared storage pool that all compute nodes (primary and read replicas) access simultaneously. Claiming "multiple storages" contradicts the core design.

Options A, B, and D are all accurate descriptions of GaussDB. A is correct because the shared architecture eliminates the traditional cold standby node, keeping all read nodes in an active serving state. B is correct because only redo logs are written to the shared storage layer, which removes the need for a double-write buffer that traditional databases like MySQL-based RDS require to guard against partial page writes. D is correct because the single shared storage means customers do not need to provision extra storage copies when scaling out read nodes.

Memory tip: Think of GaussDB as "one storage, many brains." The single shared storage is the core selling point, so any answer that says storage is duplicated or multiplied is the one to reject.

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