When to Use ZONE vs. REGION Survival Goals

A survival goal dictates how many simultaneous failure(s) a multi-region database can survive. All tables within the same database operate with the same survival goal. Each database is allowed to have its own survival goal setting.

Note:

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Allowed survival goals include:

  • ZONE (default)
  • REGION

Set a ZONE survival goal if:

  • You can accept a single node failure up to an entire zone failure. If multiple zones fail in the same region, the database may become unavailable.

Set a REGION survival goal if:

  • The database must remain available, even if a region goes down.
  • You can accept the performance cost: write latency will be increased by at least as much as the round-trip time to the nearest region. Read performance will be unaffected.
  • The database can be or already is configured with 3 or more database regions. At least three database regions are required to survive region failures.

See also

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