mirror of
https://github.com/dataforcanada/d4c-service-main-site.git
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Diego Ripley
76 lines
4.2 KiB
Markdown
76 lines
4.2 KiB
Markdown
---
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title: 🌐 Data Dissemination Strategy
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toc: true
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weight: 3
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---
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Our dissemination strategy prioritizes interoperability, long-term preservation, and decentralized resilience.
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Once data products reach a production-ready state, the workflow is as follows:
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* **Cloud-Native First:** Priority is given to highly performant, system-to-system file formats (e.g., Parquet) to enable highly performant applications.
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* **Persistent Identification & Cataloging:** Every dataset version will be assigned a DOI for citation and immutability.
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* The endpoint `https://data-01.dataforcanada.org/processed/` will strictly serve the **latest** version of a dataset.
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* Global metadata will be aggregated into a single, queryable [STAC GeoParquet](https://stac-utils.github.io/stac-geoparquet/latest/spec/stac-geoparquet-spec/) file. This catalog will track all versions and DOIs, providing direct download links to [Zenodo](https://zenodo.org/communities/dataforcanada/) which serves as the long-term data repository.
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* **Decentralized Distribution:** We will pilot BitTorrent to maximize infrastructure resilience. By leveraging [HTTP Web Seeding (BEP 19)](https://www.bittorrent.org/beps/bep_0019.html), torrents will be seeded simultaneously by Zenodo, the Data for Canada infrastructure, and community peers, ensuring high availability without a single point of failure. Current laboratory work is available on the [dataforcanada/decentralized-distribution-labs](https://github.com/dataforcanada/decentralized-distribution-labs) repo.
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## High-Level Overview
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```mermaid
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flowchart TD
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Sources[Open Data Sources]
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Processes[Transformation Processes]
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Artifacts[Systems-Ready Data]
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Portal[Object Storage]
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Metadata[Metadata]
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Distribution[Decentralized Distribution]
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Zenodo[Zenodo]
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Torrent[BitTorrent]
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Users[Researchers & Developers]
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Systems[Systems]
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Sources a1@--> Processes
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a1@{animate: true, animation: slow}
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Processes a2@--> Artifacts
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a2@{animate: true, animation: slow}
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Artifacts a3@--> Portal
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a3@{animate: true, animation: slow}
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Portal a4@--> Metadata
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a4@{animate: true, animation: fast}
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Metadata a5@--> Distribution
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a5@{animate: true, animation: fast}
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Distribution a6@--> Zenodo
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a6@{animate: true, animation: slow}
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Distribution a7@--> Torrent
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a7@{animate: true, animation: slow}
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Zenodo a9@--> Users
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a9@{animate: true, animation: slow}
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Torrent a10@--> Users
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a10@{animate: true, animation: fast}
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Torrent a11@--> Systems
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a11@{animate: true, animation: fast}
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Zenodo a12@--> Systems
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a12@{animate: true, animation: slow}
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Zenodo a13@--> Torrent
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a13@{animate: true, animation: slow}
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click Portal "https://data-01.dataforcanada.org/processed/" _blank
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click Metadata "https://stac-utils.github.io/stac-geoparquet/latest/spec/stac-geoparquet-spec/" _blank
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click Zenodo "https://zenodo.org/communities/dataforcanada/" _blank
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```
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## Work in the Lab: Smartnodes
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To further democratize access and ensure the persistence of Canada’s open data, we are experimenting with the features defined in previous **smartnode** work done by [Academic Torrents](https://academictorrents.com/docs/mirroring.html#smartnodes).
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A smartnode functions as a "set-it-and-forget-it" volunteer server, an automated library branch for our data infrastructure.
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* **Automated Mirroring:** Unlike a standard download, a smartnode automatically synchronizes with our central catalog. It intelligently fetches new or "at-risk" datasets to ensure they remain available even if the central portal experiences downtime.
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* **Volunteer-Powered Resilience:** This model allows partner institutions (universities, research labs) and public volunteers to donate bandwidth and storage. By running a smartnode, contributors actively protect vital Canadian datasets from being lost or gated behind paywalls.
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* **Dynamic Storage Management:** The node software monitors network health, automatically prioritizing rare data to maintain high availability across the entire Data for Canada ecosystem.
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We are currently adapting the `smart-node-transmission` protocols to work seamlessly with our STAC GeoParquet catalog, enabling a fully decentralized data mesh for Canadian geospatial information.
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