public void setPromotionTier(Integer promotionTier) {
        this.promotionTier = promotionTier;
    }
<p>
The order of priority in which an Aurora Replica is promoted to the primary instance after a failure of the
existing primary instance. For more information, see <a href=
"https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Concepts.AuroraHighAvailability.html#Aurora.Managing.FaultTolerance"
> Fault Tolerance for an Aurora DB Cluster</a> in the <i>Amazon Aurora User Guide</i>.
</p>

@param promotionTier
       The order of priority in which an Aurora Replica is promoted to the primary instance after a failure of
       the existing primary instance. For more information, see <a href=
       "https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Concepts.AuroraHighAvailability.html#Aurora.Managing.FaultTolerance"
       > Fault Tolerance for an Aurora DB Cluster</a> in the <i>Amazon Aurora User Guide</i>.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/DBInstance.java