Explanation
References: https://docs.cloud.oracle.com/iaas/Content/Compute/References/bestpracticescompute.htm System ResilienceOracle Cloud Infrastructure runs on Oracle's high-quality Sun servers. However, any hardware can experience a failure. Follow industry-wide hardware failure best practices to ensure the resilience of your solution. Some best practices include:
Design your system with redundant compute nodes in different availability domains to support fail-over capability.Create a custom image of your system drive each time you change the image.Back up your data drives, or sync to spare drives, regularly.If you experience a hardware failure and have followed these practices, you can terminate the failed instance, launch your custom image to create a new instance, and then apply the backup data.