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Consistency

8 items tagged with "consistency"

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Patterns1

Pattern

Write-Through Cache

A caching strategy where every write goes to the cache and the backing store synchronously, keeping the two consistent at the cost of write latency.

FAQs3

FAQ

What does ACID mean in databases?

ACID is a set of guarantees that make database transactions reliable: Atomicity (a transaction either fully completes or fully rolls back), Consistenc...

FAQ

What is the CAP theorem?

The CAP theorem states that a distributed data store can provide at most two of three guarantees at the same time: Consistency (every read sees the la...

FAQ

What is eventual consistency?

Eventual consistency is a model in distributed systems where replicas may temporarily hold different values, but if no new writes occur they will all ...

Glossaries4

Glossary

ACID

ACID is a set of four properties — Atomicity, Consistency, Isolation, and Durability — that guarantee database transactions are processed reliably even in the presence of errors, crashes, or concurrent access.

Glossary

BASE

BASE (Basically Available, Soft state, Eventual consistency) is a consistency model for distributed systems that favors availability and partition tolerance over the strict guarantees of ACID, allowing data to converge over time.

Glossary

CAP Theorem

The CAP theorem states that a distributed data store can simultaneously provide at most two of three guarantees — Consistency, Availability, and Partition tolerance — forcing a trade-off when a network partition occurs.

Glossary

Eventual Consistency

Eventual consistency is a guarantee that, in the absence of new updates, all replicas of a piece of data will converge to the same value over time, though reads may temporarily return stale results.