mirror of
https://github.com/dataforcanada/d4c-service-main-site.git
synced 2026-06-13 14:00:51 +02:00
Diego Ripley
91 lines
5.1 KiB
Markdown
91 lines
5.1 KiB
Markdown
---
|
||
title: 🌐 Data Dissemination Strategy
|
||
weight: 3
|
||
prev: /docs/processes/field_imagery/
|
||
next: /contact/
|
||
---
|
||
|
||
{{< callout type="important" icon="sparkles" >}}
|
||
We prioritize interoperability, long-term preservation, and decentralized resilience.
|
||
{{< /callout >}}
|
||
|
||
## High-Level Overview
|
||
|
||
```mermaid
|
||
|
||
flowchart TD
|
||
subgraph mirrors [Mirrors]
|
||
SourceCoop[Source Cooperative]
|
||
Zenodo[Zenodo]
|
||
InternetArchive[Internet Archive]
|
||
end
|
||
|
||
Sources[Open Data Sources]
|
||
Processes[Transformation Processes]
|
||
Artifacts[Systems-Ready Data]
|
||
Portal[Object Storage]
|
||
Metadata[Metadata]
|
||
Distribution[Decentralized Distribution]
|
||
Torrent[BitTorrent]
|
||
Users[Data People & Developers]
|
||
Systems[Systems]
|
||
|
||
Sources a1@--> Processes
|
||
a1@{animate: true, animation: slow}
|
||
Processes a2@--> Artifacts
|
||
a2@{animate: true, animation: slow}
|
||
Artifacts a3@--> Portal
|
||
a3@{animate: true, animation: slow}
|
||
Portal a4@--> Metadata
|
||
a4@{animate: true, animation: fast}
|
||
Metadata a5@--> Distribution
|
||
a5@{animate: true, animation: fast}
|
||
|
||
Distribution a7@--> Torrent
|
||
a7@{animate: true, animation: slow}
|
||
Distribution a8@--> mirrors
|
||
a8@{animate: true, animation: slow}
|
||
|
||
mirrors a9@--> Torrent
|
||
a9@{animate: true, animation: fast}
|
||
|
||
mirrors a12@ --> Users
|
||
a12@{animate: true, animation: slow}
|
||
mirrors a13@ --> Systems
|
||
a13@{animate: true, animation: slow}
|
||
|
||
Torrent a10@--> Users
|
||
a10@{animate: true, animation: fast}
|
||
Torrent a11@--> Systems
|
||
a11@{animate: true, animation: fast}
|
||
|
||
click Metadata "https://stac-utils.github.io/stac-geoparquet/latest/spec/stac-geoparquet-spec/" _blank
|
||
click Zenodo "https://zenodo.org/communities/dataforcanada/" _blank
|
||
click SourceCoop "https://source.coop/dataforcanada/" _blank
|
||
```
|
||
|
||
## Dissemination Process
|
||
Once data products reach a production-ready state, the workflow is as follows:
|
||
|
||
- **Cloud-Native First:** Priority is given to performant, system-to-system file formats (e.g., Parquet) to enable highly performant applications.
|
||
- **Persistent Identification & Cataloging:** Every dataset version will be assigned a DOI for citation and immutability.
|
||
- The endpoint `https://data-01.dataforcanada.org/processed/` will strictly serve the **latest** version of a dataset.
|
||
- 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, directing users to our multi-tier storage network:
|
||
- **[Source Cooperative](https://source.coop/dataforcanada)** serves as our **primary mirror** for all datasets, including large-scale products like orthoimagery (see [Funding and Governance](https://docs.source.coop/#funding-and-governance)).
|
||
- **[Zenodo](https://zenodo.org/communities/dataforcanada/)** serves as our repository for **long-term preservation** and provides a mirror for users in Europe (see [Funding](https://about.zenodo.org/infrastructure/)).
|
||
- **[The Internet Archive](https://archive.org)** is utilized **strategically** for specific datasets to minimize load on their limited infrastructure (see [Funding](https://projects.propublica.org/nonprofits/organizations/943242767)).
|
||
- **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 Source Cooperative, 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.
|
||
|
||
|
||
## Work in the Lab: Smartnodes
|
||
|
||
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).
|
||
|
||
A smartnode functions as a "set-it-and-forget-it" volunteer server, an automated library branch for our data infrastructure.
|
||
|
||
* **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.
|
||
* **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.
|
||
* **Dynamic Storage Management:** The node software monitors network health, automatically prioritizing rare data to maintain high availability across the entire Data for Canada ecosystem.
|
||
|
||
We are currently refining the concepts from [smart-node-transmission](https://github.com/academictorrents/smartnode-transmission) to work seamlessly with our STAC GeoParquet catalog, enabling a fully decentralized data mesh for Canadian geospatial information.
|