Designing for Failure
Managing RTO and RPO for AWS Disaster Recovery
Designing for high availability, fault tolerance and cost efficiency
High Availability in RDS
High Availability in Amazon Aurora
High Availability in DynamoDB
The course is part of this learning path
This section of the Solution Architect Associate learning path introduces you to the High Availability concepts and services relevant to the SAA-C03 exam. By the end of this section, you will be familiar with the design options available and know how to select and apply AWS services to meet specific availability scenarios relevant to the Solution Architect Associate exam.
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- Learn the fundamentals of high availability, fault tolerance, and back up and disaster recovery
- Understand how a variety of Amazon services such as S3, Snowball, and Storage Gateway can be used for back up purposes
- Learn how to implement high availability practices in Amazon RDS, Amazon Aurora, and DynamoDB
An Aurora multi-master setup allows you to configure a pair of masters in an active-active read-write configuration which can later be scaled up on demand by the customer to a maximum of four masters. In this configuration, you can read and write to any of the provisioned master instances, providing improved fault tolerance within the compute layer.
In the example shown here, the configuration deploys an active-active pair of compute instances with each instance being deployed in its own availability zone. If an instance outage occurs in one availability zone, all database writes can be redirected to the remaining active instance managed by the customer in the client-side logic, and all without the need to perform a failover. This also provides protection from az outages.
As earlier mentioned, when required, a customer can scale up the multi-master instance count up to a maximum of four instances. Do keep in mind that in this multi-master configuration, you cannot add additional read replicas into the cluster. In terms of connection management, incoming database connections are not load-balanced by the service. Rather, the load balancing connection logic must be implemented by you and performed on the client side. With this in mind, let's now take a quick look at a demo that shows how easy it is to set up and use a multi-master Aurora database cluster, complete with client-side connection management.
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.