With Cloud Spanner, if one region goes offline, data can still be served from another region. How does Cloud Spanner make this possible?

✅  The correct answer is:

  • Cloud Spanner uses synchronous replication within and across regions to achieve greater availability.

Question:

With Cloud Spanner, if one region goes offline, data can still be served from another region. How does Cloud Spanner make this possible?

Solution:

  • Cloud Spanner captures up to a petabyte of data on one Transfer Appliance without impacting the outbound network.
  • Cloud Spanner stores and serves an unlimited number of objects and up to 5 terabytes of object data for each.
  • Cloud Spanner automates loading data into BigQuery from YouTube, AdWords, and DoubleClick.
  • Cloud Spanner uses synchronous replication within and across regions to achieve greater availability.