He cloud computing It has had an abysmal growth in recent years, especially with the arrival of the pandemic and remote work. Thus, more and more companies depend on high availability in the cloud for their operation. According to Statista, in 2021 the estimated spending on IT services worldwide is $ 1.2 trillion, being the region of America where more is invested in this type of services. Gartner projections also suggest that by 2026 spending on cloud services will exceed 45% of all enterprise IT spending. But investing in cloud servers is not the final step to guarantee more efficient processes. With the adoption of a cloud infrastructure also comes the challenge of maintaining operability, hence the importance of high availability.
What is high availability in the cloud?Simply put, availability refers to how long a system or component is operational. This is measured in percentages, as an example: if you host an application in the cloud and the server has interruptions due to an electrical failure, the availability would no longer be 100%. Therefore, the more frequent the outages, the lower the average availability. Now, high availability should not be confused with uptime. The latter only considers whether a service is accessible or usable. Instead, availability takes into account the number of connections a server allows, so it's also a way to measure infrastructure capacity.
Importance of availability in cloud servicesBeing able to guarantee high levels of availability is important to prevent errors that would affect the user experience or put the security of your applications at risk. In short, this is what a highly available structure can offer:
- Long periods of operation, which has positive effects on profitability, productivity and customer satisfaction.
- In the event of unexpected events, such as blackouts, negative effects can be minimized to keep company services operational.
- In the face of potential network failures or cyberattacks, high availability in the cloud can help keep confidential information safe.
How do you achieve high availability in the cloud?The most important thing to achieve high availability is to choose cloud servers that can guarantee it. Companies like Amazon and Microsoft maintain cloud high availability levels of 99% or higher in its services: AWS and Azure, respectively. This is considered excellent performance considering that maintaining a 100% availability is a complex task. More than aiming to get a system that never fails, when evaluating a service provider it is important that you take into account the factors or technologies that the company offers you to improve availability. For example:
- Recovery time.
- The number of application servers.
- The load balancers.
- The failover configuration.-
- Scheduled maintenance.
- Monitoring tools.