CAP allows the system to guarantee
all of the ACID alongside high availability when there are no partitions
(5) Consistency versus Latency: Studies indicate that latency is a
critical factor in online interactions. Increase as small as 100 ms can
dramatically reduce the probability that customers will continue to
interact or return [23] to a web portal. In case of e-Commerce application
this is directly related to the profits. Latency can be achieved
without compensating the CAP theorem and hence it is expected
that database management systems are increasingly going to pay
more attention to decreasing the latency.
As a matter of fact, latency tends to come at the cost of consistency.
Considering several replicas in the system, a client could
immediately read the first replica which it can access without
checking consistency. The second option is that the client could opt