computeRedundancy
Specifies whether to create standby standby DB data access shard for the DB shard group. Valid values are the following:
0 - Creates a DB shard group without a standby DB data access shard. This is the default value.
1 - Creates a DB shard group with a standby DB data access shard in a different Availability Zone (AZ).
2 - Creates a DB shard group with two standby DB data access shard in two different AZs.