#RDS VS REDSHIFT UPGRADE#

With size flexibility, your RI’s discounted rate will automatically apply to usage of any size in the instance family (using the same database engine).Į.g If you are running a db.r4.8xlarge with corresponding RI ,and have now decided to upgrade to db.r4.16xlarge, then you can purchase reservation for 1 db.r4.8xlarge to avoid on-demand charges. To do so, you would purchase additional RI in us-east-1 with RDS MySQL database Engine Type, Instance type/size and count.Īmazon RDS Reserved Instances provide size flexibility for the MySQL, MariaDB, PostgreSQL, and Amazon Aurora database engines. In order to optimize your monthly billing for all the RDS instances, you would need to purchase additional RDS RI. As a result, your January 2018 monthly bill would include 2 MySQL RDS with On-Demand rate and 1 unused RI available for RDS PostgreSQL database engine (see Table 2). At the end of January 2018, your monthly bill would include RDS RI discount on 2 PostgreSQL RDS instances since you only have 2 running PostgreSQL RDS instances in us-east-1 region. On January 1 2018, you purchased RI for 3 PostgreSQL r3.db.4xlarge instances in us-east1. Database Typeįor example, let’s consider that you have been running 2 PostgreSQL RDS (r3.db.4xlarge) instances and 2 MySQL RDS (r3.db.4xlarge) instances in us-east-1 since December 2017. If there is mismatch in any of the parameter, RI discount will not be applied. RI can be visualised as discount coupons that can be applied to your final monthly bill.īelow table provides a list of parameters that you can set when purchasing RI. RI does not renew automatically you can continue to use the RDS/Redshift instances/nodes without interruption, but you will be charged On-Demand rates if you do not have sufficient number of RI counts in your AWS account. When you purchase RI, the RI is automatically applied to running RDS/Redshift nodes with the same instance parameters (Region, Engine/Node Type, RDS DB Instance Class, and Instance Count). Important point to note is that RI is not a physical instance.i.e to achieve savings, you don’t have to modify your running instance. If you are expecting consistent heavy use (e.g., Database Services), RIs can provide significant cost savings as compared to using On-Demand instances. The discounted usage price is fixed for the term of the RI, allowing you to predict costs over the term of the reservation. In case of EC2, they also provide capacity reservation i.e AWS will ensure that you always have access to EC2 capacity when you need it, for as long as you need it. Reserved Instance(RI) is a billing concept which provides pricing discounts for your running instances in AWS accounts to help lower costs. If you would like to read more about the Cost optimization pillar, you can refer to this whitepater. Cost optimization is one of the 5 pillars of AWS Well-Architected Framework, a framework developed by AWS to help cloud architects build secure, high-performing, resilient, and efficient infrastructure for their applications. In this post, we would understand what are reserved instances, when do you need them and various ways to monitor them in your environment.Īs more enterprises are embracing AWS cloud technologies, we need to understand AWS’s breadth of services and pricing options to right size our compute resources and run efficient infrastructure.

Rds vs redshift