Your company wants to expand their users outside the United States for their popular application. The company wants to ensure 99.999% availability of the database for their application and also wants

Question

Options

• ACreate a multi-regional Cloud Spanner instance with "nam-asia-eur1" configuration.
• BCreate a multi-regional Cloud Spanner instance with "nam3" configuration.
• CCreate a cluster with at least 3 Spanner nodes.
• DCreate a cluster with at least 1 Spanner node.
• ECreate a minimum of two Cloud Spanner instances in separate regions with at least one node.
• FCreate a Cloud Dataflow pipeline to replicate data across different databases.

• A
  74% (26)
• B
  14% (5)
• D
  6% (2)
• E
  3% (1)
• F
  3% (1)

Explanation

To achieve 99.999% availability globally and minimize read latency for users worldwide, two actions are needed. First (A): A multi-regional Cloud Spanner instance with the 'nam-asia-eur1' configuration spans North America, Asia, and Europe, placing replicas across three continents. This global distribution reduces read latency for users in all regions and meets the 99.999% availability SLA. The 'nam3' configuration (B) only covers North America, which is insufficient for global users. Second (C): Cloud Spanner's 99.999% SLA for multi-regional instances requires at least 3 nodes. Option D (1 node) is insufficient for this SLA. Option E (two instances in separate regions) would require manual data replication and doesn't provide Spanner's native global consistency. Option F (Dataflow replication) introduces complexity and potential consistency issues.

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