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The business ultimately sets the IT budget, and therefore the RTO and RPO metrics need to fit with the available budget. While the ideal is zero data loss and zero time loss, the cost associated with that level of protection historically have made high-availability solutions impractical and unaffordable.
Minimizing downtime and data loss during disaster recovery is typically measured in terms of two key concepts: Recovery time objective (RTO), time until a system is completely up and running; Recovery point objective (RPO), a measure of the ability to recover files by specifying a point in time the backup copy will restore to.
A Recovery Point Objective (RPO) is the maximum acceptable interval during which transactional data is lost from an IT service. [ 11 ] For example, if RPO is measured in minutes, then in practice, off-site mirrored backups must be continuously maintained as a daily off-site backup will not suffice.
Continuous data protection (CDP), also called continuous backup or real-time backup, refers to backup of computer data by automatically saving a copy of every change made to that data, essentially capturing every version of the data that the user saves. In its true form it allows the user or administrator to restore data to any point in time. [1]
Global Mirror is an IBM technology that provides data replication over extended distances between two sites for business continuity and disaster recovery.If adequate bandwidth exists, Global Mirror provides a recovery point objective (RPO) of as low as 3–5 seconds [1] between the two sites at extended distances with no performance impact on the application at the primary site.
Amazon’s new policy defies data that shows RTO mandates throttle recruitment and aren’t linked with increased productivity. Amazon’s back-to-office crusade could backfire, experts say ...