Database Reference
In-Depth Information
network partition is a phenomenon where, due to network failure or any other reason, one
part of the system cannot communicate with the other part(s) of the system. An example
of network partition is a system that has some nodes in a subnet A and some in subnet B,
and due to a faulty switch between these two subnets, the machines in subnet A will not
be able to send and receive messages from the machines in subnet B. The network will be
allowed to lose many messages arbitrarily sent from one node to another. This means that
even if the cable between the two nodes is chopped, the system will still respond to the re-
quests.
The following figure shows the database classification based on the CAP theorem:
An example of a partition-tolerant system is a system with real-time data replication with
no centralized master(s). So, for example, in a system where data is replicated across two
data centers, the availability will not be affected, even if a data center goes down.
