08-cloud-distributed

Family 08. Cloud and Distributed

Origin. Azure Architecture Center, Nygard

44 entries, 393,060 words. Every entry carries all 18 dimensions from the entry contract.

Capacity Management

Pattern	Maturity	Words	Intent
Autoscaling	canonical	7,084	A fixed-size pool of servers forces a choice between two costly extremes.

Cloud Distributed

Pattern	Maturity	Words	Intent
Asynchronous Request-Reply	canonical	7,657	A client calls an API expecting an answer inside the budget of one HTTP connection, typically well under a second.
Index Table	canonical	8,260	A data store organizes its records by a primary key so that, given the key, it can locate the record in close to constant time.
Messaging Bridge	canonical	6,068	An organization that has been running for more than a few years rarely has one messaging system.
Static Content Hosting	canonical	7,149	A team is building a website, a documentation portal, a marketing page, a single-page application, or the client half of a larger system, and the content does not need to change ...

Cloud Distributed Systems

Pattern	Maturity	Words	Intent
External Configuration Store	canonical	8,251	An application reads its behavior-controlling values, a database connection string, a feature toggle, a rate limit, a UI theme choice, a downstream service URL, from a file that ...

Cloud and Distributed

Pattern	Maturity	Words	Intent
Backends for Frontends	established	7,877	A product ships to more than one kind of client.
Cache-Aside	canonical	11,151	A service reads the same records far more often than it writes them, and the read path is expensive.
Federated Identity	canonical	8,634	An organization runs several applications.
Gateway Aggregation	canonical	7,007	A client needs data or a decision that no single backend service owns end to end.
Gateway Offloading	canonical	9,619	An application is built as a set of backend instances, whether that is one service replicated many times or several distinct services behind one entry point.
Materialized View	canonical	8,521	An application reads data far more often than it writes it, and the shape a write path needs is almost never the shape a read path wants.

Cloud and Distributed Systems

Pattern	Maturity	Words	Intent
Ambassador	canonical	7,796	A service needs network capabilities that are not really its own concern.
Gateway Routing	canonical	8,277	A client, whether a browser, a mobile app, or another service, needs to talk to a system that is actually made of several independently deployed backends.
Pipes and Filters	canonical	8,496	A system needs to apply a series of transformations or checks to a stream of data, and the natural first implementation is one large function or one large class that performs ...
Sidecar	canonical	8,589	A service needs a capability that is not part of its core business logic.

Coordination

Pattern	Maturity	Words	Intent
Leader Election	canonical	7,764	A fleet of otherwise identical replicas exists for availability.
Scheduler Agent Supervisor	canonical	11,058	An application needs to run a task that has more than one step, and at least one of those steps calls a remote service or accesses a remote resource that the application does not ...

Data Distribution

Pattern	Maturity	Words	Intent
Sharding	canonical	7,039	A single database server has a hard limit on what it can do.

Data and Consistency

Pattern	Maturity	Words	Intent
Command Query Responsibility Segregation	established	11,618	A single model is being asked to serve two jobs whose requirements have diverged, and the model is losing on both.

Data and Persistence

Pattern	Maturity	Words	Intent
Event Sourcing	established	9,797	A system needs to answer questions about how it reached its current state, and the storage model it uses has already destroyed the answer.

Data consistency

Pattern	Maturity	Words	Intent
Compensating Transaction	canonical	8,001	A single database transaction gives you atomicity for free.
Saga	canonical	9,350	A business operation spans several stores of record and must either happen in full or leave nothing of consequence behind, and there is no transaction manager that can span them.

Deployment and Scale

Pattern	Maturity	Words	Intent
Deployment Stamps	canonical	9,185	A team ships a SaaS product as a single deployed instance, one application tier, one database, one everything, and every customer's traffic and data flow through that one instance.

Geo-Distribution and Availability

Pattern	Maturity	Words	Intent
Geode	established	10,088	A service with users spread across a continent, or across the world, starts from the simplest possible shape.

Integration

Pattern	Maturity	Words	Intent
Anti-Corruption Layer	canonical	8,210	A team owns a domain model it has deliberately kept clean.

Messaging and Integration

Pattern	Maturity	Words	Intent
Choreography	established	9,041	A business process spans more than one service, and each service owns a slice of state that no other service is allowed to touch directly, because that is the entire point of ...
Claim Check	canonical	8,847	A service publishes a message that needs to carry a large piece of data, a scanned document, a video file, a full order history export, a machine learning feature vector, a ...
Publisher-Subscriber	canonical	8,855	A component in a system needs to tell other components that something happened, and it does not know, and should not need to know, who those other components are.
Sequential Convoy	established	10,171	A system receives a stream of messages, and a subset of those messages must be applied in the order they were produced because applying them out of sequence corrupts the state ...

Migration

Pattern	Maturity	Words	Intent
Strangler Fig	canonical	10,348	A system has been running in production for years.

Reliability

Pattern	Maturity	Words	Intent
Health Endpoint Monitoring	canonical	8,421	A service running behind a load balancer, an orchestrator, or a service mesh can fail in ways that are invisible from outside the process.

Resilience

Pattern	Maturity	Words	Intent
Bulkhead	canonical	9,972	A process holds a finite pool of something that every request needs.
Retry	canonical	9,997	A caller sends a request across a boundary it does not control.

Resilience and Scale

Pattern	Maturity	Words	Intent
Cell-Based Architecture	established	8,879	A service starts as one deployed thing. One database, one fleet of application servers, one code path that every request runs through.

Resilience and Traffic Management

Pattern	Maturity	Words	Intent
Competing Consumers	canonical	7,217	A system produces units of work faster, or in bursts larger, than a single consumer process can absorb, and the units of work are independent of one another, meaning any one of ...
Priority Queue	canonical	10,299	A distributed system that processes work through a queue, whether that queue is a message broker topic, a job table, a task list, or a pending pod list, eventually accumulates ...
Queue-Based Load Leveling	canonical	9,730	A system accepts work at a rate that varies over time, sometimes sharply, while the component that actually performs the work has a roughly fixed processing capacity per unit time.
Rate Limiting	canonical	10,989	A service exposes an operation that costs something to perform.
Throttling	canonical	10,477	A service exposes an operation that costs something to run.

Security

Pattern	Maturity	Words	Intent
Gatekeeper	established	9,190	A cloud service exposes one or more API endpoints across an untrusted network, typically the public internet.
Valet Key	canonical	9,199	An application sits between a client, a browser, a mobile app, a worker process, and a data store or messaging service, object storage, a queue, a database export target.

Stability

Pattern	Maturity	Words	Intent
Circuit Breaker	canonical	12,004	A service calls a remote dependency. The dependency degrades in the worst possible way, which is not by refusing connections but by accepting them and answering slowly or not at ...

Traffic Distribution

Pattern	Maturity	Words	Intent
Load Balancing	canonical	6,878	A service running on one machine has a hard ceiling on the traffic it can handle.

Reading order

Entries are independent. Each one names the patterns it composes with and the patterns it conflicts with in dimension 13, so following those links gives a better path than reading top to bottom.

Generated by tools/gen-indexes.py. Do not edit by hand.