Recovery Point Objective (RPO)
stores Usage Engine stores data in RDS database that can refer to data in a runtime storage that is either:
EFS disk storage
Redis MemoryDB storage
It is crucial that the data referred from the database actually exist in the runtime data storage. A failure to meet this criteria can result in unpredictable behaviour and a failure to execute business logic, i.e aborted workflows. The other dependency does not apply, i.e if data exist in the runtime storage but the referring data in the RDS database is missing, this will not lead to aborted workflows but just dataloss. As some dataloss is expected during a disaster recovery scenario but a failure to execute business logic can be fatal it is important that in recovery scenarios the resulting data on the file system is always newer than the data in the database.
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