Large Data Notes Guides • Benchmarks • Templates

Support for data systems under pressure: memory limits, long runtimes, unstable types, and cost growth. Reviews also cover automation, LLM systems, and twin builds when they sit inside a data workflow. Output is a short plan plus specific actions, based on evidence from logs and runs.

Measured fixes for large data workflows

Support focused on pipelines under pressure: memory limits, long runtimes, unstable types, and cost growth. Output is a short plan plus specific actions, based on evidence from logs and runs.

1) Pipeline review

Fast review of an existing pipeline to locate failure points and slow steps.

  • Memory growth and retention checks
  • Type drift and schema stability checks
  • I/O bottlenecks (CSV parsing, joins, writes)
  • Failure modes: retries, timeouts, partial outputs
diagnosis stability

2) Cost & runtime audit

Reduce total run time and spend, without changing the meaning of outputs.

  • Compute time per stage (where time is spent)
  • Storage and file format choices (CSV vs Parquet)
  • Small-file issues and partition decisions
  • Repeat-run waste (unneeded recompute)
cost runtime

3) Validation pack

Lightweight checks to confirm outputs can be trusted after changes.

  • Row counts, null rates, and basic distributions
  • Join sanity checks and key integrity
  • Sample stability checks across runs
  • Run notes for reproducibility
correctness repeatability

4) LLM system review

Review a retrieval or assistant setup (RAG or tool use) with checks for quality, safety, and cost.

  • Data source selection and indexing rules
  • Retrieval checks: recall risk, empty hits, duplication
  • Answer checks: groundedness, format rules, refusal rules
  • Cost and latency limits: caching, rate limits, fallbacks
llmevaluation

5) Automation review

Design or review automation that runs safely: guardrails, fallbacks, monitoring, and audit traces.

  • Risk list and guardrails (what must never happen)
  • Fallback logic (manual review, safe defaults)
  • Monitoring and alerts (failure, drift, cost)
  • Run logs and change control
automationmonitoring

6) Twin modelling review

Review a digital or geomatic twin build: data feeds, state updates, spatial joins, and validation rules.

  • State update loop (feeds, timing, id rules)
  • Spatial handling (tiling, joins, indexing)
  • Validation (ground truth, bounds, update rate)
  • Link to prediction and planning outputs
twinsspatial
Scope estimator (slider)

Move the slider to estimate the shape of work. This is not pricing; it is a quick way to set expectations.

Small
What is included One pipeline, one dataset type, and a short list of changes with checks.

Tip: if the pipeline touches 100GB+ and runs for hours, start with “Medium”.

What is delivered?

A short report: failure points, measured bottlenecks, and a ranked change list. When relevant, include a template checklist for future runs.

What if data is sensitive?

Work can be based on logs, schema summaries, and small redacted samples. No raw data is required by default.

How is success measured?

Runtime reduction, peak memory reduction, fewer retries, and stable outputs (row counts, null rates, and key distributions).

Can this work across domains?

Yes. Focus stays on pipeline behaviour: file formats, joins, sampling, memory, and correctness checks.

Contact

Ready to start? Use the contact form to send a short problem statement. Replies are usually sent within 2 business days.

services@largedatanotes.com
You can email directly or use the contact page to build a structured brief.