Isolation

Kind: constraint

Layer: Atomic Boundary

Record: architecture:isolation

Severity: contextual

Scope: database, transaction, concurrency

Canonical: Ontology

A rule or precondition that concurrent transactions do not see each other's uncommitted changes, to the degree the isolation level declares.

Listed in Architecture principles, after Consistency and before Concurrency Control.

Requires

• Concurrency Control

Reinforces

• Correctness

Enables

• Safe Concurrent Operations

Conflicts with

• Dirty Reads/Writes

In tension with

• Throughput

Tensions

• Isolation / Throughput

Violated by

• Dirty Reads/Writes

Refactored by

• Pessimistic Locking
• Transaction Isolation Level

Severity

• contextual

Category

• Transactions / State / Concurrency

Reinforced by

• Partitioning

Required by

• ACID

Linked from

• Correctness / Determinism / Verification
• Scalability / Performance / Optimization
• Transactions / State / Concurrency
• Transactions / State / Concurrency
• Severity levels
• The resolutions