There are six design principles for operational excellence in the cloud:
* Perform operations as code
* Annotate documentation
* Make frequent, small, reversible changes
* Refine operations procedures frequently
* Anticipate failure
* Learn from all operational failures
Reference: https://aws.amazon.com/blogs/apn/the-5-pillars-of-the-aws-well-architected-framework/

Availability Zones work together within a region to provide users with the ability to easily setup and configure redundant architecture and backup solutions

The AWS Storage Gateway service enables hybrid cloud storage between on-premises environments and the AWS Cloud. It seamlessly integrates on-premises enterprise applications and workflows with Amazon's block and object cloud storage services through industry standard storage protocols. It provides low-latency performance by caching frequently accessed data on premises, while storing data securely and durably in Amazon cloud storage services. It provides an optimized data transfer mechanism and bandwidth management, which tolerates unreliable networks and minimizes the amount of data being transferred. It brings the security, manageability, durability, and scalability of AWS to existing enterprise environments through native integration with AWS encryption, identity management, monitoring, and storage services. Typical use cases include backup and archiving, disaster recovery, moving data to S3 for in-cloud workloads, and tiered storage.
Reference:
https://aws.amazon.com/storagegateway/faqs/

Explanation/Reference: https://aws.amazon.com/premiumsupport/knowledge-center/report-aws-abuse/

https://aws.amazon.com/blogs/apn/the-6-pillars-of-the-aws-well-architected-framework/ Built around six pillars-operational excellence, security, reliability, performance efficiency, cost optimization, and sustainability-AWS Well-Architected provides a consistent approach for customers and partners to evaluate architectures and implement scalable designs.
Reliability
The Reliability pillar encompasses the ability of a workload to perform its intended function correctly and consistently when it's expected to. This includes the ability to operate and test the workload through its total lifecycle. You can find prescriptive guidance on implementation in the Reliability Pillar whitepaper.