With Cloud Spanner, If One Region Goes Offline, Data Can Still Be Served From Another Region. How Does Cloud Spanner Make This Possible?

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.