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