Rio
25a98b60ab
Co-authored-by: Rio <rio@agents.livingip.xyz> Co-committed-by: Rio <rio@agents.livingip.xyz>
1.4 KiB
1.4 KiB
| type | title | author | url | date | domain | format | status | tags | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| source | What Is Backpressure | Dagster | https://dagster.io/glossary/data-backpressure | 2024-01-01 | internet-finance | essay | unprocessed |
|
What Is Backpressure (Dagster)
Dagster's practical guide to backpressure in data pipelines. Written for practitioners building real data processing systems.
Key Content
- Backpressure: feedback mechanism preventing data producers from overwhelming consumers
- Without backpressure controls: data loss, crashes, resource exhaustion
- Consumer signals producer about capacity limits
- Implementation strategies: buffering (with threshold triggers), rate limiting, dynamic adjustment, acknowledgment-based flow
- Systems using backpressure: Apache Kafka (pull-based consumption), Flink, Spark Streaming, Akka Streams, Project Reactor
- Tradeoff: backpressure introduces latency but prevents catastrophic failure
- Key principle: design backpressure into the system from the start
Relevance to Teleo Pipeline
Our pipeline has zero backpressure today. The extract-cron.sh checks for unprocessed sources and dispatches workers regardless of eval queue state. If extraction outruns evaluation, PRs accumulate with no feedback signal. Simple fix: extraction dispatcher should check open PR count before dispatching. If open PRs > threshold, reduce extraction parallelism or skip the cycle.