High Availability Models
Hardware
Planned Down
Recovery Time
Data Recovery
Standard
Data Redundancy
Loosely Coupled
Fault Tolerant
Off the Shelf
4 hours
4-12 hours
Last Backup
Off the Shelf
4 hours
4-12 hours
Last committed transaction
Off the Shelf
5-15 minutes
Up to 15 minutes
Last committed transaction
Price !!!
4 hours
Up to10 secs
No loss
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