Cost Engineering

Unit economics of data — attribution, reducing shuffle/scan, and stopping 4x regressions. This path sequences the category's 11 resources by roadmap stage and composite score — work top-down inside each step.

Reliability

1. Spark Cost Regression Guard 37 — Detect the 4x cost jump in CI, before it reaches the invoice.
2. Spark job suddenly costs 4x 36.75 — Spark job suddenly costs 4x
3. Compute unit economics for a pipeline 34.15 — Compute unit economics for a pipeline
4. Install cost guardrails before the invoice 34.15 — Install cost guardrails before the invoice
5. Attribute a 4x Spark cost regression 34.15 — Attribute a 4x Spark cost regression
6. Attribute spend with the Cost Lens plugin 34.15 — Attribute spend with the Cost Lens plugin

5 more on the category page.

Documented prerequisites, deduplicated: skill-spark-skew-diagnosis.

• Capture cost-relevant metrics from a Spark run
• Store and compare a baseline
• Explain which stage caused a regression
• Attribute compute cost to a pipeline run
• Define a unit metric that resists regressions
• Set an alert on cost-per-run, not on total spend
• Define a unit metric per pipeline
• Baseline the last N runs and fail CI past a threshold

Security-flagged: Spark Cost Regression Guard, Spark job suddenly costs 4x, Spark Cost Check, Cost Unit-Economics Reporter, Cost Guardrails, Cost Lens, Cost Optimizer — review the security posture first. Verification on these records: 11 community. Nothing here is independently audited — the trust scan and your own review are the controls.

Phase 4 of the roadmap. Stage context: Reliability · side-by-side comparison · all learning topics