CAP Theorem
Have your cake and eat it, just not consistently, all the time in a partition-tolerant way!
CAP
- Consistency
- Availability
- Partition Tolerance
You can't have all three!
Consistency
Data is the same for everyone, everywhere
Availability
Data is always available
Partition Tolerance
Handling communication failures between nodes
In English
You can't show all users up-to-date data all the time
Why Not?
You Just Can't
Shop
Consistency Sacrifice
Stock Market
Limits
Availability Sacrifice
UNiDAYS - Registration
- Insert into primary database
- Insert into rapid access cache
- Send welcome email
- Record registration for reporting
- Lookup email format in University list for step 2
deck
By trullock
