Backtrack Storage Pricing
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In this section of the AWS Certified: SAP on AWS Specialty learning path, we introduce you to the various Database services currently available in AWS that are relevant to the PAS-C01 exam.

Learning Objectives

  • Identify and describe the AWS-managed Relational Database Service
  • Design highly available and resilient SAP database architectures using Amazon RDS


The AWS Certified: SAP on AWS Specialty certification has been designed for anyone who has experience managing and operating SAP workloads. Ideally you’ll also have some exposure to the design and implementation of SAP workloads on AWS, including migrating these workloads from on-premises environments. Many exam questions will require a solutions architect level of knowledge for many AWS services, including Amazon RDS. All of the AWS Cloud concepts introduced in this course will be explained and reinforced from the ground up.


Let me now move on to backtrack storage costs with Amazon Aurora. Backtrack is a feature that is only currently available for a MySQL-compatible Aurora database, using and is configured at the time of the database creation.  Essentially, backtrack allows you to go back in time on the database to recover from an error or incident without having to perform a restore or create another DB cluster.  For a deeper dive on on Backtrack storage, take a look at this AWS blog post found here:

As you can see from the configuration page during the Aurora database creation process, it is enabled via a checkbox and allows you to enter a number in hours of how far you would like to ‘backtrack’ to, with a maximum of 72 hours.  In this example, I have entered 12 hours, and so Aurora will retain log data of all changes 12 hours as specified.  The number of changes made directly relates to how much the Backtrack feature is going to cost you.  

The pricing shown here is based upon a set cost per 1 million change records per hour for the London region.

So let’s look at an example.  If you had built an Aurora database with a 12 hour backtrack setting like I had in my previous example that was generating 50,000 change records per hour the calculation would be as follows:

Obtain the total number of change records for your backtrack time period:

50,000 (change records/hour) x 12 hours = 600,000 change records 

Calculating total costs based upon the London region:

(600,000 / 1,000,000) x $0.014 = $0.0084/hour

To help you keep an accurate record of the number of change records, you can use Amazon CloudWatch to help you monitor the number of change records that are being generated each hour. 

About the Author
Learning Paths

Stuart has been working within the IT industry for two decades covering a huge range of topic areas and technologies, from data center and network infrastructure design, to cloud architecture and implementation.

To date, Stuart has created 150+ courses relating to Cloud reaching over 180,000 students, mostly within the AWS category and with a heavy focus on security and compliance.

Stuart is a member of the AWS Community Builders Program for his contributions towards AWS.

He is AWS certified and accredited in addition to being a published author covering topics across the AWS landscape.

In January 2016 Stuart was awarded ‘Expert of the Year Award 2015’ from Experts Exchange for his knowledge share within cloud services to the community.

Stuart enjoys writing about cloud technologies and you will find many of his articles within our blog pages.