The main objective of every technology manager is to make sure that all the company's operations involving the IT area are fully operational. The goal is to have high availability in all services, thus avoiding financial losses, reduced productivity and other annoyances. But does your company have such a critical mission that it justifies having all of its infrastructure running continuously?

It is important to point out that, as much as there are benefits in keeping all operations running, this high availability comes at a cost. Remember that one of the objectives of migrating to the cloud is the search for cost reduction and therefore, having a high workload may be going against this objective.

High availability versus cost

In the process of migrating to the cloud, one of the project steps is to evaluate the use of instances and services that will meet the operational needs of the company. In this survey stage, for example, the application and database servers and functions such as load balancing, replication, backup and recovery are seen.

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The reality for enterprises is that some workloads will inevitably be more important than others, and the cost of having high availability will not always be justified. It makes no sense, for example, to invest as much in protecting instances dedicated to software development and testing as you can spend to protect your payroll application and solutions like ERP and CRM.

Mission Critical Instances and AWS Spot

When well planned, the architecture used in the cloud must support workloads that are mission critical and other workloads that are not so important. Based on this scenario, you can reduce the cost of less important workloads by leveraging AWS Spot instances.

AWS Spot instances have identical characteristics to a normal EC2 instance, the difference is in two respects. The first is the different billing model between instance types. The other difference is that AWS Spot instances are subject to outage. Therefore, AWS pot instances should not run on workloads that are mission critical.

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To understand what type of instance to use, you need to check how Amazon Web Services operates. Amazon invests in hardware resources through its EC2 instances, then releases those resources to subscribers. One of the problems with this business model is that, at certain times, these instances will not be used. These resources represent the AWS hardware capacity that is idle.

So that these computing resources are not wasted, AWS offers these instances at a discount, presenting the same characteristics defined in a normal EC2 instance.

The important thing about this process of choosing instances is having an understanding of the architecture used in the cloud, in order to define what type of solution is considered mission critical or that can be used with AWS Spot instances. In the end, it is possible to obtain a cost reduction for the project.

Follow us on our blog and on social media. Get in touch with our team of specialists and ask questions about which type of instance can be considered mission critical in your migration project.

Written by

Sky.One Team

This content was produced by SkyOne's team of cloud and digital transformation experts.