October 2018
Intermediate to advanced
332 pages
8h 9m
English
Content preview from Mastering Flask Web Development - Second Edition
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CAP theorem
The CAP theorem stands for consistency, availability, and partition tolerance, and states that it's not possible for a distributed system to guarantee all three, so a trade-off must be made.
The following list shows exactly what each of these guarantees means on a distributed system:
- Consistency: Guarantees that each node on a cluster returns the most recent write and preserves linear consistency
- Availability: Every non failing node is able to respond to a request with a non error response
- Partition tolerance: The system continues to operate despite network outages/delays
The theorem states that in case of a network partition, a distributed system has to choose between consistency or availability, so in the case of a network ...