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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Data Infrastructure Architecture</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
background: #0a0e27;
color: #e0e0e0;
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
padding: 40px 20px;
line-height: 1.6;
}
.container {
max-width: 1400px;
margin: 0 auto;
}
h1 {
text-align: center;
font-size: 2.5em;
margin-bottom: 10px;
background: linear-gradient(135deg, #00d4ff, #0099ff, #6600ff);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
}
.subtitle {
text-align: center;
color: #888;
margin-bottom: 50px;
font-size: 1.1em;
}
.architecture {
display: grid;
grid-template-columns: 1fr;
gap: 40px;
margin-bottom: 60px;
}
.layer {
background: linear-gradient(135deg, rgba(20, 40, 80, 0.3), rgba(40, 20, 80, 0.2));
border: 2px solid rgba(0, 200, 255, 0.3);
border-radius: 12px;
padding: 30px;
transition: all 0.3s ease;
}
.layer:hover {
border-color: rgba(0, 200, 255, 0.6);
box-shadow: 0 0 20px rgba(0, 200, 255, 0.2);
}
.layer-title {
display: flex;
align-items: center;
gap: 12px;
font-size: 1.4em;
font-weight: bold;
margin-bottom: 20px;
color: #00d4ff;
}
.layer-icon {
width: 30px;
height: 30px;
background: linear-gradient(135deg, #00d4ff, #0099ff);
border-radius: 8px;
display: flex;
align-items: center;
justify-content: center;
}
.components {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
gap: 15px;
}
.component {
background: rgba(0, 0, 0, 0.4);
border-left: 4px solid #0099ff;
border-radius: 8px;
padding: 15px;
transition: all 0.3s ease;
}
.component:hover {
border-left-color: #00d4ff;
background: rgba(0, 100, 200, 0.1);
transform: translateX(5px);
}
.component-title {
font-weight: bold;
color: #00d4ff;
margin-bottom: 8px;
font-size: 1.05em;
}
.component-desc {
color: #aaa;
font-size: 0.95em;
line-height: 1.5;
}
.flow-diagram {
margin-top: 50px;
background: rgba(0, 0, 0, 0.3);
border: 2px dashed rgba(0, 200, 255, 0.2);
border-radius: 12px;
padding: 40px;
text-align: center;
}
.flow-step {
display: inline-block;
background: linear-gradient(135deg, rgba(0, 150, 255, 0.2), rgba(100, 100, 255, 0.1));
border: 2px solid #0099ff;
border-radius: 8px;
padding: 15px 25px;
margin: 10px;
font-weight: bold;
color: #00d4ff;
position: relative;
min-width: 180px;
}
.flow-arrow {
color: #0099ff;
font-size: 1.5em;
margin: 0 5px;
display: inline-block;
}
.roadmap {
background: linear-gradient(135deg, rgba(255, 150, 0, 0.15), rgba(255, 100, 0, 0.1));
border: 2px solid rgba(255, 150, 0, 0.3);
border-radius: 12px;
padding: 40px;
margin-top: 50px;
}
.roadmap-title {
font-size: 1.8em;
font-weight: bold;
color: #ffaa00;
margin-bottom: 30px;
}
.roadmap-item {
display: flex;
gap: 20px;
margin-bottom: 25px;
align-items: flex-start;
}
.roadmap-number {
width: 40px;
height: 40px;
background: linear-gradient(135deg, #00d4ff, #0099ff);
color: #000;
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
font-weight: bold;
font-size: 1.1em;
flex-shrink: 0;
}
.roadmap-content {
flex: 1;
}
.roadmap-week {
font-weight: bold;
color: #ffaa00;
font-size: 1.05em;
margin-bottom: 5px;
}
.roadmap-description {
color: #bbb;
font-size: 0.95em;
}
.bucket-structure {
background: rgba(0, 0, 0, 0.4);
border: 2px solid #0099ff;
border-radius: 8px;
padding: 20px;
font-family: 'Courier New', monospace;
font-size: 0.9em;
color: #00d4ff;
margin: 20px 0;
overflow-x: auto;
}
.decision-box {
background: linear-gradient(135deg, rgba(100, 200, 0, 0.15), rgba(150, 200, 50, 0.1));
border-left: 5px solid #66cc00;
border-radius: 8px;
padding: 20px;
margin: 20px 0;
color: #ccc;
}
.decision-title {
font-weight: bold;
color: #66cc00;
margin-bottom: 10px;
}
@media (max-width: 768px) {
h1 {
font-size: 1.8em;
}
.components {
grid-template-columns: 1fr;
}
.flow-step {
display: block;
margin: 10px 0;
}
}
</style>
</head>
<body>
<div class="container">
<h1>π Data Infrastructure Architecture</h1>
<p class="subtitle">CSV ingestion, metadata management, monitoring & user access</p>
<!-- Storage Layer -->
<div class="layer">
<div class="layer-title">
<div class="layer-icon">πΎ</div>
Storage & Ingestion
</div>
<div class="components">
<div class="component">
<div class="component-title">MinIO S3</div>
<div class="component-desc">
Bucket structure: <br>
<code>/raw/{dataset_name}/YYYY-MM-DD/</code><br>
<code>/staging/{dataset_name}/</code><br>
<code>/hive/{schema}/{table}/</code><br>
<code>/processed/{dataset_name}/</code>
</div>
</div>
<div class="component">
<div class="component-title">File Monitoring</div>
<div class="component-desc">
Option 1: MinIO bucket notifications β Kafka/Redis<br>
Option 2: Lightweight Python daemon with polling<br>
Detects new & updated CSV files automatically
</div>
</div>
</div>
<div class="bucket-structure">
minio/<br>
βββ raw/<br>
β βββ orders/2025-01-01/orders_20250101.csv<br>
β βββ patients/2025-01-02/patients.csv<br>
β βββ caregivers/current_schema.json<br>
βββ staging/<br>
β βββ orders/2025-01-01_validated.csv<br>
β βββ _metadata.json<br>
βββ hive/<br>
β βββ fisheries/catches/data_20251213.parquet<br>
β βββ tables/eu_catches_2023/data_20251213.parquet<br>
βββ processed/<br>
βββ mart_orders/ (dbt transforms)
</div>
</div>
<!-- Processing Layer -->
<div class="layer">
<div class="layer-title">
<div class="layer-icon">β‘</div>
Data Processing Pipeline
</div>
<div class="components">
<div class="component">
<div class="component-title">Ingestion Service</div>
<div class="component-desc">
Validates CSV schema, detects incremental vs new datasets, converts to Parquet in <code>/hive/{schema}/{table}/</code>
</div>
</div>
<div class="component">
<div class="component-title">Hive Metastore</div>
<div class="component-desc">
Tracks table definitions and locations for Trino. Metadata stored in Postgres (<code>hive_metastore</code> DB)
</div>
</div>
<div class="component">
<div class="component-title">Trino (Your Setup)</div>
<div class="component-desc">
Unified SQL interface over Parquet in MinIO via Hive catalog
</div>
</div>
</div>
</div>
<!-- Metadata Layer -->
<div class="layer">
<div class="layer-title">
<div class="layer-icon">π·οΈ</div>
Metadata Management (DataHub)
</div>
<div class="components">
<div class="component">
<div class="component-title">DataHub Container</div>
<div class="component-desc">
UI + GMS for catalog, lineage, ownership, tags, data quality metrics
</div>
</div>
<div class="component">
<div class="component-title">Postgres (Metadata)</div>
<div class="component-desc">
Stores Hive metastore metadata plus DataHub and Superset metadata databases
</div>
</div>
<div class="component">
<div class="component-title">Ingestion Connectors</div>
<div class="component-desc">
Hive source connector pulls table definitions. Custom connector for monitoring pipeline status
</div>
</div>
</div>
<div class="decision-box">
<div class="decision-title">Key Metadata Tracked:</div>
Dataset name, schema, record count, last updated, data owner, retention policy, quality checks, language distribution (for multilingual data)
</div>
</div>
<!-- User Access Layer -->
<div class="layer">
<div class="layer-title">
<div class="layer-icon">π₯</div>
User Access & Analytics
</div>
<div class="components">
<div class="component">
<div class="component-title">Superset</div>
<div class="component-desc">
Dashboards & ad-hoc queries via Trino. Auto-syncs table metadata from Hive catalog
</div>
</div>
<div class="component">
<div class="component-title">Jupyter Notebooks</div>
<div class="component-desc">
Container with python-trino, pandas, matplotlib. Programmatic access to Trino + DataHub API
</div>
</div>
<div class="component">
<div class="component-title">dbt (Optional)</div>
<div class="component-desc">
Transform raw β staging β marts. Auto-generates documentation linked to DataHub
</div>
</div>
</div>
<div class="decision-box">
<div class="decision-title">Single Source of Truth:</div>
All tools query the same unified Trino interface. One table definition = available everywhere.
</div>
</div>
<!-- Orchestration Layer -->
<div class="layer">
<div class="layer-title">
<div class="layer-icon">π</div>
Orchestration & Scheduling
</div>
<div class="components">
<div class="component">
<div class="component-title">Apache Airflow</div>
<div class="component-desc">
DAGs for: file monitoring β ingestion β catalog sync β DataHub metadata extraction. Retry logic, error alerts
</div>
</div>
<div class="component">
<div class="component-title">Monitoring & Alerting</div>
<div class="component-desc">
Track pipeline runs, data quality checks (schema validation, row counts, null ratios). Alert on failures
</div>
</div>
</div>
</div>
<!-- Data Flow -->
<div class="flow-diagram">
<h3 style="color: #00d4ff; margin-bottom: 20px;">Data Flow</h3>
<div>
<span class="flow-step">CSV lands in /raw/</span>
<span class="flow-arrow">β</span>
<span class="flow-step">Monitor detects</span>
<span class="flow-arrow">β</span>
<span class="flow-step">Validate schema</span>
<br style="margin: 15px 0;">
<span class="flow-step">Move to /staging/</span>
<span class="flow-arrow">β</span>
<span class="flow-step">Convert to Parquet</span>
<span class="flow-arrow">β</span>
<span class="flow-step">Hive Metastore</span>
<span class="flow-arrow">β</span>
<span class="flow-step">Trino queries</span>
<br style="margin: 15px 0;">
<span class="flow-step">DataHub syncs</span>
<span class="flow-arrow">β</span>
<span class="flow-step">Superset/Notebooks</span>
</div>
</div>
<!-- Implementation Roadmap -->
<div class="roadmap">
<div class="roadmap-title">β±οΈ Implementation Roadmap</div>
<div class="roadmap-item">
<div class="roadmap-number">1</div>
<div class="roadmap-content">
<div class="roadmap-week">Week 1: Monitoring & Ingestion</div>
<div class="roadmap-description">
Set up S3 event notifications or polling daemon. Validates CSVs, moves to /staging/. Choose: Keep as CSV or convert to Parquet.
</div>
</div>
</div>
<div class="roadmap-item">
<div class="roadmap-number">2</div>
<div class="roadmap-content">
<div class="roadmap-week">Week 2: Catalog & Trino Integration</div>
<div class="roadmap-description">
Set up Hive metastore in your Trino config. Create external table definitions. Test table discovery in Superset.
</div>
</div>
</div>
<div class="roadmap-item">
<div class="roadmap-number">3</div>
<div class="roadmap-content">
<div class="roadmap-week">Week 3: DataHub Deployment</div>
<div class="roadmap-description">
Docker Compose setup. Configure Hive ingestion connector for automated metadata sync. Wire up UI.
</div>
</div>
</div>
<div class="roadmap-item">
<div class="roadmap-number">4</div>
<div class="roadmap-content">
<div class="roadmap-week">Week 4: Orchestration</div>
<div class="roadmap-description">
Build Airflow DAGs for automated ingestion, catalog sync, data quality checks. Set up alerts.
</div>
</div>
</div>
</div>
<!-- Key Decisions -->
<div style="background: rgba(0, 0, 0, 0.3); border: 2px solid rgba(200, 0, 200, 0.3); border-radius: 12px; padding: 40px; margin-top: 50px;">
<h3 style="color: #cc00ff; font-size: 1.4em; margin-bottom: 20px;">π― Key Design Decisions</h3>
<div class="decision-box">
<div class="decision-title">CSV vs Parquet in Staging?</div>
<strong>Skip Parquet if:</strong> Files are small, accessed rarely, storage not constrained.<br>
<strong>Use Parquet if:</strong> Files are large (100MB+), queried repeatedly, compression matters.
</div>
<div class="decision-box">
<div class="decision-title">File Monitoring: S3 Events vs Polling?</div>
<strong>S3 Events (Kafka):</strong> Production-grade, real-time, scalable. More infrastructure.<br>
<strong>Polling Daemon:</strong> Simple, works for dev/small data. Less overhead.
</div>
<div class="decision-box">
<div class="decision-title">Why Hive + Iceberg?</div>
Schema evolution (add columns without breaking code) β’ ACID transactions (for incremental updates) β’ Time travel (query historical versions) β’ Unified catalog for all tools
</div>
<div class="decision-box">
<div class="decision-title">Why DataHub?</div>
Single source of truth for ownership/lineage β’ Avoid duplication (one definition, discovered everywhere) β’ Data quality metrics & tagging β’ Integrates via REST API
</div>
<div class="decision-box">
<div class="decision-title">Multilingual Data (Greek/German/French/English)</div>
Handle at ingestion time: encoding detection + Unicode normalization (NFKC). Track language distribution. Use database collations (el_GR.UTF-8 for Greek, etc).
</div>
</div>
</div>
</body>
</html>