Pull Model

Definitions

1. A data retrieval pattern in which the consumer initiates requests to fetch data from the source at its own pace, rather than the source pushing data to consumers. Prometheus uses a pull model, scraping metrics endpoints on a schedule; iterators and lazy evaluation are code-level examples of pull-based data flow.

   In plain English: A system where the receiver asks for data when it's ready, rather than having data shoved at it by the sender.

   Example: "Prometheus uses a pull model — it scrapes each service's /metrics endpoint every 15 seconds instead of having services push to it."

Related Terms

• Webhook vs. Polling
• Event-Driven Architecture
• blast radius
• ADR
• Client
• Decentralization
• Distributed Systems
• Domain
• Push Model