# Desk log FLF-PFS-20260822

**Status:** First-party InfiniSynapse desk log (sanitized composite; not a customer extract)  
**Page:** https://infinisynapse.com/en/blog/parquet-files  
**Run ID:** `FLF-PFS-20260822`  
**Date:** 2026-08-22 (Saturday)  
**Operator:** InfiniSynapse Data Team  
**Attestor:** William Zhu, InfiniSynapse cofounder ([GitHub @allwefantasy](https://github.com/allwefantasy))  
**Contact for contradictions:** zhuhl@infinisynapse.com

## What this file is

A downloadable record of zipping last month’s archive versus authorizing a shared-grain folder of weekly Parquet parts. It is **not** a named-logo customer case, a vendor bake-off, or a W3C / Apache experiment.

## Four-step method (reproducible)

1. Sanitize leftover columns on every part. Register path, owner, and partition style.
2. Inventory each part. Profile week 9 and any leftover sample file.
3. Ask one window: return rate by SKU for weeks 7–12, denominator = orders.
4. Inspect the part list and row totals. Exclude extras on purpose. Re-ask.

## Source and goal

| Field | Value |
|---|---|
| Sources | Twelve weekly parts (~4.2 million rows) |
| Standing goal | Return rate by SKU for weeks 7–12, denominator = orders |
| Contrast | Zip-as-series vs grain-as-series |

## Results

| Retrieval state | Series registered | Extra file + week-9 drift profiled | Part list + counts matched |
|---|---|---|---|
| Zip-as-series | 0 | 0 | 0 |
| Grain-as-series | 1 | 1 | 1 |

Wall-clock for the successful grain rerun: 10 minutes (warehouse time excluded). The clock started when the operator opened the standing goal and ended when the inventory, the excluded sample, and the six-week pack sat side by side.

## What you may cite

- Artifact counts 0/0/0 → 1/1/1, 12 weekly parts + ~4.2M rows on this run, ~10 min wall-clock, run ID

## What you may not claim

- Customer uplift %, a faster zip, official EEAT score, named-logo case, or that OWL / SPARQL / RDF / Gartner / WAIC scored this run

## Independent context (not this run)

- [Apache Parquet format specification](https://parquet.apache.org/docs/file-format/) (retrieved 2026-08-29)
- [Apache Parquet format on GitHub](https://github.com/apache/parquet-format) (retrieved 2026-08-29)
- [Wikipedia Apache Parquet](https://en.wikipedia.org/wiki/Apache_Parquet) (retrieved 2026-08-29)
- [Spark Parquet data source](https://spark.apache.org/docs/latest/sql-data-sources-parquet.html) (retrieved 2026-08-29)
- [Iceberg partitioning](https://iceberg.apache.org/docs/latest/partitioning/) (retrieved 2026-08-29)
- [Hive LanguageManual DDL](https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL) (retrieved 2026-08-29)
- [Apache Arrow datasets](https://arrow.apache.org/docs/python/dataset.html) (retrieved 2026-08-29)
- [DuckDB Parquet guide](https://duckdb.org/docs/stable/data/parquet/overview.html) (retrieved 2026-08-29)
- [OWL 2 overview](https://www.w3.org/TR/owl2-overview/) (retrieved 2026-08-29)
- [SPARQL 1.1](https://www.w3.org/TR/sparql11-query/) (retrieved 2026-08-29)
- [RDF 1.1 concepts](https://www.w3.org/TR/rdf11-concepts/) (retrieved 2026-08-29)
- [JSON-LD 1.1](https://www.w3.org/TR/json-ld11/) (retrieved 2026-08-29)
- [Turtle](https://www.w3.org/TR/turtle/) (retrieved 2026-08-29)
- [W3C DCAT](https://www.w3.org/TR/vocab-dcat-3/) (retrieved 2026-08-29)
- [DataCite](https://datacite.org/) (retrieved 2026-08-29)
- [ISO/IEC 9075](https://www.iso.org/standard/76583.html) (retrieved 2026-08-29)
- [NIST AI Risk Management Framework](https://www.nist.gov/itl/ai-risk-management-framework) (retrieved 2026-08-29)
- [OWASP Top 10 for LLM Applications](https://owasp.org/www-project-top-10-for-large-language-model-applications/) (retrieved 2026-08-29)
- First-party homepage recognition only (self-described; not independently verified here): [2026 WAIC Future Tech OPC Excellence Award](https://infinisynapse.com/#recognition)

## Machine-readable aggregate

- [aggregate-FLF-PFS-20260822.csv](./aggregate-FLF-PFS-20260822.csv)
- [verify-FLF-PFS-20260822.py](./verify-FLF-PFS-20260822.py)