Distributing the risk of failure
AWS servers are deployed across different data centers with independent power, air conditioning, and networking environments.
Even if a hardware failure or network failure occurs in a specific data center, continued operation is assured because the service automatically switches to a waiting server in another data center.
A reliable backup system
Data in the database is always backed up, so data can be restored in the unlikely event that data loss occurs due to a mistake by the system administrator or the like.
Additionally, backup data is stored on the dedicated server of a system that is completely separate from the operations server.
We use Amazon S3 for storing backup data. Amazon S3 is designed to provide 99.999999999% durability of objects over a given year because it stores data redundantly across multiple facilities.
For more details about Amazon Web Services security, please visit the AWS security center.