Database Reference
In-Depth Information
Quoting Wikipedia, "[In a distributed system] given a sufficiently long time over which
no changes [in system state] are sent, all updates can be expected to propagate eventually
through the system and the replicas will be consistent". (The page on eventual consistency
is available at
http://en.wikipedia.org/wiki/Eventual_consistency
.
)
Eventual consistent systems are also called BASE, a made-up term to represent that these
systems are on one end of the spectrum, which has traditional databases with ACID prop-
erties on the opposite end.
Cassandra is one such system that provides high availability and partition-tolerance at the
cost of consistency, which is tunable. The preceding figure shows a partition-tolerant
eventual consistent system.
