The BASE short form is used to describe the properties of certain databases, usually NoSQL databases. It's often referred to as the reverse of ACID.
There are only few articles that touch upon the details of
BASE, whereas ACID has plenty of articles that elaborate on each of the
atomicity, consistency, isolation and durability properties.
The CAP theorem states that a distributed computer system
cannot guarantee all of the following three properties at the same time:
- Consistency
- Availability
- Partition tolerance
Basically Available, Soft state, Eventual consistency
Basically available could refer to the perceived availability of the data. If a single node fails, part of the data won't be available, but the entire data layer stays operational. Basically available indicates that the system does guarantee availability, in terms of the CAP theorem.
Soft state: All I could find was the concept of data needing a period refresh. Without a refresh, the data will expire or be deleted.
- Automatic deletion of data in a database seems
strange to me.
- Expired or stale data makes more sense. But
this concept would apply to any type of redundant data storage, not just
NoSQL. Does it describe something else then?
Eventual consistency means
that updates will eventually ripple through to all servers, given enough time.
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