processor_tda: Add documentation for processor_tda #2277

cosmo0920 · 2025-12-04T09:13:28Z

Corresponding to fluent/fluent-bit#11250.

Summary by CodeRabbit

New Features
- Added a TDA-based processor that analyzes metric streams and exports topology-based metrics (Betti numbers) to assist anomaly and regime detection.
Documentation
- New processor documentation covering configuration options (windowing, embedding, thresholds), processing overview, interpretation of Betti metrics, and configuration examples.

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coderabbitai · 2025-12-04T09:13:52Z

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📥 Commits

Reviewing files that changed from the base of the PR and between fc6e1b2 and 14290e6.

📒 Files selected for processing (1)

pipeline/processors/tda.md (1 hunks)

Walkthrough

Added documentation for a new Topological Data Analysis (TDA) processor: pipeline/processors.md lists "TDA" and a new pipeline/processors/tda.md documents the processor, its configuration, processing pipeline, exported metrics, and examples (Betti 0–2 via Ripser).

Changes

Cohort / File(s)	Summary
Processors overview `pipeline/processors.md`	Added a new "TDA" entry to the processors list referencing the TDA-based processor.
TDA processor docs `pipeline/processors/tda.md`	New documentation describing the `tda` processor: configuration options (`window_size`, `min_points`, `embed_dim`, `embed_delay`, `threshold` with defaults), processing steps (aggregation, normalization, sliding window, optional delay embedding, distance matrix, threshold selection), Ripser integration for persistent homology (H0–H2), exported metrics (`fluentbit_tda_betti0`, `fluentbit_tda_betti1`, `fluentbit_tda_betti2`), interpretation guidance, and example YAML snippets.

Sequence Diagram(s)

sequenceDiagram
    autonumber
    participant FluentBit as Fluent Bit pipeline
    participant TDA as TDA Processor
    participant Ripser as Ripser PH Library
    participant Exporter as Metrics Exporter

    FluentBit->>TDA: emit aggregated/normalized metrics (sliding window)
    TDA->>TDA: optional delay embedding -> distance matrix -> threshold selection
    TDA->>Ripser: compute persistent homology (H0..H2)
    Ripser-->>TDA: persistence intervals / Betti counts
    TDA->>Exporter: expose metrics (`fluentbit_tda_betti0/1/2`)
    Exporter-->>Monitoring: scrape/collect metrics

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Verify the documented parameter names and defaults in pipeline/processors/tda.md match the implementation.
Confirm metric names and exporter conventions for fluentbit_tda_betti0/1/2.
Check Ripser integration description (H0–H2) and threshold selection modes correspond to actual code or dependency requirements.
Review examples/YAML for accurate field names and formatting.

Possibly related PRs

consolidate YAML / processor info #2183 — Updates processor listings in pipeline/processors.md; likely overlaps with placement/formatting of the new TDA entry.

Poem

🐰 I hop through metrics, curious and bright,
Counting loops and holes into the night.
Betti numbers hum a hidden tune,
Ripser maps shapes beneath the moon,
Docs now bloom — we chase patterns in light. ✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: adding documentation for the processor_tda component.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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Actionable comments posted: 9

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 17989cc and 08b3196.

📒 Files selected for processing (2)

pipeline/processors.md (1 hunks)
pipeline/processors/tda.md (1 hunks)

🧰 Additional context used

🪛 GitHub Actions: Lint PRs

pipeline/processors/tda.md

[error] 3-3: FluentBit.EmDash: Don't put a space before or after a dash.

[error] 3-3: FluentBit.EnDash: Use an em dash ('—') instead of '–'.

[error] 80-80: FluentBit.NonStandardQuotes: Use standard single quotes or double quotes only. Do not use left or right quotes.

[error] 112-112: FluentBit.EnDash: Use an em dash ('—') instead of '–'.

[error] 116-116: FluentBit.NonStandardQuotes: Use standard single quotes or double quotes only. Do not use left or right quotes.

[error] 136-136: FluentBit.EmDash: Don't put a space before or after a dash.

[error] 136-136: FluentBit.EnDash: Use an em dash ('—') instead of '–'.

[error] 138-138: FluentBit.NonStandardQuotes: Use standard single quotes or double quotes only. Do not use left or right quotes.

[error] 138-138: FluentBit.EnDash: Use an em dash ('—') instead of '–'.

[error] 138-138: FluentBit.NonStandardQuotes: Use standard single quotes or double quotes only. Do not use left or right quotes.

[error] 173-173: FluentBit.NonStandardQuotes: Use standard single quotes or double quotes only. Do not use left or right quotes.

[error] 173-173: FluentBit.Latin: Use 'for example' instead of 'e.g.,'.

[warning] 173-173: FluentBit.Latin: Use 'for example' instead of 'e.g.,'.

[error] 173-173: FluentBit.NonStandardQuotes: Use standard single quotes or double quotes only. Do not use left or right quotes.

[error] 173-173: FluentBit.Latin: Use 'for example' instead of 'e.g.,'.

[error] 173-173: FluentBit.EnDash: Use an em dash ('—') instead of '–'.

[error] 173-173: FluentBit.NonStandardQuotes: Use standard single quotes or double quotes only. Do not use left or right quotes.

[error] 173-173: FluentBit.Latin: Use 'for example' instead of 'e.g.,'.

[error] 173-173: FluentBit.SentenceLengthLong: Improve readability by using fewer than 35 words in this sentence.

[error] 173-173: FluentBit.Latin: Use 'for example' instead of 'e.g.,'.

[error] 173-173: FluentBit.EnDash: Use an em dash ('—') instead of '–'.

[error] 173-173: FluentBit.NonStandardQuotes: Use standard single quotes or double quotes only. Do not use left or right quotes.

[error] 173-173: FluentBit.Latin: Use 'for example' instead of 'e.g.,'.

[error] 173-173: FluentBit.SentenceLengthLong: Improve readability by using fewer than 35 words in this sentence.

[error] 173-173: FluentBit.Latin: Use 'through or by using' instead of ' via '.

[warning] 173-173: FluentBit.Headings: 'Interpreting Betti numbers' should use sentence-style capitalization.

[error] 173-173: FluentBit.NonStandardQuotes: Use standard single quotes or double quotes only. Do not use left or right quotes.

[error] 173-173: FluentBit.EnDash: Use an em dash ('—') instead of '–'.