Tag
fan-out
- Oct 12, 2026 Dynamic Task Mapping: Graphs Expanded at Run Time What changes when the number of tasks is unknown at definition time, how map indices are keyed, and why the reduce step is the hard part. data engineering
- Jul 4, 2026 Chained Jobs and Fan-In Completion Without a Coordinator How a job that spawns children can know when they are all finished, why the counter must count terminal outcomes rather than successes, and how the successor is triggered exactly once. backend systems
- Dec 27, 2025 Fan-Out and the Amplification of Tail Latency How issuing a request to many backends converts a rare slow response into a common one, the arithmetic behind that amplification, and the structural ways to cap it. backend systems
- Nov 24, 2025 Fan-Out Topologies and Duplicate Export What happens when one agent serves several backends, why a collector behind a load balancer exports each span twice, and how to keep retries from multiplying records. observability
- May 9, 2025 Append-Only Logs and the Queue Abstraction Destructive reads and append-only retention produce different broker state, different fan-out costs, and different limits on what a consumer can ask for. backend systems
- Aug 19, 2024 Hedged Requests and the Arithmetic of Tail Latency Why the slowest of several parallel calls sets the latency of a fan-out, and how a delayed second attempt trades a fixed slice of extra load for a large reduction in the tail. backend systems
- Jul 31, 2022 Scatter-Gather Fan-Out and Tail Latency Multiplication A query over P partitions waits for the slowest one, so the 99th percentile of a single node becomes the median of the cluster. How hedged requests and partial results change the curve. distributed systems
- Nov 27, 2021 Dependency Objectives: Propagating Budgets Across a Call Graph How a caller composes its own objective from the objectives of services it depends on, and why consistent fan-out makes end-to-end targets arithmetically impossible. observability