What factors would you consider when designing a highly available system, and how would you ensure that it can handle failover scenarios?

During my final year project, I collaborated with a team to design a student portal for our university. We considered factors like user load, server redundancy, and data storage. To make the portal highly available, we proposed using cloud services that would automatically scale with user demand. We also included a failover mechanism where if one server went down, traffic would be rerouted to a backup server. This practical experience taught me how crucial it is to think ahead about potential failures and ensure that our system could handle them gracefully, ensuring students could access their information anytime.

While volunteering for a local charity, I helped manage an event registration system. We anticipated a high volume of attendees, so I suggested we use a simple backup system to handle registrations. We utilized a spreadsheet as a backup method in case the main system experienced downtime. This taught me the importance of having a failover plan in place, even for smaller projects. Ensuring that we had this backup allowed us to register attendees without issues, demonstrating to me how even simple solutions can provide high availability.

In my first job as a support assistant, I noticed that our customer support system had frequent downtimes. I recommended implementing a secondary system that could take over during outages. By doing so, we ensured that customers could still reach us even if our primary system failed. This experience highlighted the importance of redundancy and planning for failure, as it not only kept our service running but also improved customer satisfaction significantly when they faced issues.