CompTIA Cloud+ Practice Test

Which methodology should be chosen for patching application servers while maintaining performance and no downtime?

1. Rolling update

2. Patching directly

3. Blue-green deployment

4. Three staging environments

The correct answer is: Three staging environments

Choosing the strategy of utilizing three staging environments for patching application servers while maintaining performance and avoiding downtime is effective because it allows for comprehensive testing and controlled deployment of patches without impacting live production services. In this context, the use of three staging environments can be understood as follows: one environment can be used for the current production version, while the other two serve as staging areas. Patches can be applied and tested in one staging environment, ensuring that any issues are identified before moving to production. The second staging environment can be used as a fallback or for additional testing, further reducing the risk of downtime when the patch is eventually applied. This methodology is beneficial because it allows for thorough testing of the patch in a controlled environment, ensuring that performance issues can be addressed before changes impact users. It also ensures that if the newly patched version encounters severe issues, the original version can be quickly reverted back to, thereby providing an additional layer of safety against disruptions. In contrast, other methodologies may not offer the same guarantees of zero downtime. For example, a rolling update could result in periods where some users experience the old version while others use the updated version, potentially leading to inconsistencies. Patching directly on production servers increases the risk of service disruption if something goes wrong