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‎src/current/README_ALGOLIA_MIGRATION.md‎

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# CockroachDB Documentation Algolia Migration
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This repository contains the complete Algolia search migration system for CockroachDB documentation, replacing the Jekyll Algolia gem with a custom Python-based indexing solution.
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## 📋 Overview
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### What This Migration Provides
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- **🎯 Smart Indexing**: Intelligent content extraction with bloat removal
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- **🔄 Incremental Updates**: Only index changed content, with deletion support
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- **📏 Dynamic Version Detection**: Automatically detects and indexes the current stable version
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- **🏢 TeamCity Integration**: Production-ready CI/CD deployment
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- **⚡ Performance**: ~90% size reduction vs naive indexing while maintaining quality
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### Migration Benefits
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| Feature | Jekyll Algolia Gem | New Python System |
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|---------|-------------------|-------------------|
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| **Incremental Indexing** | ❌ Full reindex only | ✅ Smart incremental with deletion support |
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| **Content Quality** | ⚠️ Includes UI bloat | ✅ Intelligent bloat removal |
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| **Version Detection** | ✅ Dynamic | ✅ Dynamic (same logic) |
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| **TeamCity Integration** | ⚠️ Git commits state | ✅ External state management |
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| **Index Size** | ~350K records | ~157K records (production match) |
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| **Performance** | Slow full rebuilds | Fast incremental updates |
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## 🏗️ System Architecture
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### Core Components
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```
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┌─────────────────────────────────────────────────┐
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│ TeamCity Job │
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├─────────────────────────────────────────────────┤
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│ 1. Jekyll Build (creates _site/) │
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│ 2. algolia_indexing_wrapper.py │
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│ ├── Smart Full/Incremental Decision │
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│ ├── Version Detection │
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│ └── Error Handling & Logging │
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│ 3. algolia_index_intelligent_bloat_removal.py │
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│ ├── Content Extraction │
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│ ├── Intelligent Bloat Filtering │
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│ ├── Stable Object ID Generation │
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│ └── Algolia API Updates │
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└─────────────────────────────────────────────────┘
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```
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## 📁 Files Overview
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### Production Files (Essential)
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| File | Purpose | TeamCity Usage |
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|------|---------|----------------|
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| **`algolia_indexing_wrapper.py`** | Smart orchestration, auto full/incremental logic | ✅ Main entry point |
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| **`algolia_index_intelligent_bloat_removal.py`** | Core indexer with bloat removal | ✅ Called by wrapper |
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| **`_config_cockroachdb.yml`** | Version configuration (stable: v25.3) | ✅ Read for version detection |
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### Development/Testing Files
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| File | Purpose | TeamCity Usage |
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|------|---------|----------------|
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| **`test_wrapper_scenarios.py`** | Comprehensive wrapper logic testing | ❌ Dev only |
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| **`test_incremental_indexing.py`** | Incremental indexing validation | ❌ Dev only |
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| **`check_ranking_parity.py`** | Production parity verification | ❌ Optional validation |
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| **`compare_to_prod_explain.py`** | Index comparison analysis | ❌ Optional analysis |
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| **`test_all_files.py`** | File processing validation | ❌ Dev only |
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| **`algolia_index_prod_match.py`** | Legacy production matcher | ❌ Reference only |
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## 🚀 TeamCity Deployment
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### Build Configuration
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```yaml
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# Build Steps
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1. "Build Documentation Site"
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- bundle install
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- bundle exec jekyll build --config _config_cockroachdb.yml
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2. "Index to Algolia"
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- python3 algolia_indexing_wrapper.py
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```
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### Environment Variables
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```bash
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# Required (TeamCity Secure Variables)
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ALGOLIA_APP_ID=7RXZLDVR5F
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ALGOLIA_ADMIN_API_KEY=<encrypted_key>
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# Configuration
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ALGOLIA_INDEX_ENVIRONMENT=staging # or 'production'
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ALGOLIA_STATE_DIR=/opt/teamcity-data/algolia_state
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ALGOLIA_FORCE_FULL=false # Set to 'true' to force full reindex
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```
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### Server Setup
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```bash
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# On TeamCity agent machine
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sudo mkdir -p /opt/teamcity-data/algolia_state
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sudo chown teamcity:teamcity /opt/teamcity-data/algolia_state
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sudo chmod 755 /opt/teamcity-data/algolia_state
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```
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## 🎯 Smart Indexing Logic
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### Automatic Full vs Incremental Decision
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The wrapper automatically decides between full and incremental indexing:
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**Full Indexing Triggers:**
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1. **First Run**: No state file exists
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2. **Force Override**: `ALGOLIA_FORCE_FULL=true`
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3. **Corrupted State**: Invalid state file
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4. **Stale State**: State file >7 days old
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5. **Content Changes**: Git commits affecting source files
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6. **Config Changes**: `_config_cockroachdb.yml` modified
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7. **Incomplete Previous**: <100 files tracked (indicates failure)
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**Incremental Indexing (Default):**
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- Recent valid state file
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- No source file changes
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- No configuration changes
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- Previous indexing was complete
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### Version Detection
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Dynamically reads from `_config_cockroachdb.yml`:
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```yaml
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versions:
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stable: v25.3 # ← Automatically detected and used
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dev: v25.3
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```
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**Indexing Rules:**
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- ✅ Always include: `/releases/`, `/cockroachcloud/`, `/advisories/`, `/molt/`
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- ✅ Include stable version files: Files containing `v25.3`
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- ❌ Exclude old versions: `v24.x`, `v23.x`, etc.
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- 🔄 Smart dev handling: Only exclude dev if stable equivalent exists
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## 🧠 Intelligent Bloat Removal
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### What Gets Removed
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- **85K+ Duplicate Records**: Content deduplication using MD5 hashing
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- **UI Spam**: Navigation elements, dropdowns, version selectors
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- **Table Bloat**: Repetitive headers, "Yes/No" cells
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- **Download Spam**: "SQL shell Binary", "Full Binary" repetition
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- **Grammar Noise**: "referenced by:", "no references"
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- **Version Clutter**: Standalone version numbers, dates
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### What Gets Preserved
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- ✅ All SQL commands and syntax
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- ✅ Technical documentation content
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- ✅ Error messages and troubleshooting
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- ✅ Release notes and changelogs
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- ✅ Important short technical terms
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- ✅ Complete page coverage (no artificial limits)
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## 📊 Performance Metrics
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### Size Optimization
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```
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Production Index: 157,471 records
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Naive Indexing: ~350,000 records
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Size Reduction: 55% smaller
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Quality: Maintained/Improved
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```
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### Speed Improvements
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```
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Jekyll Gem Full Rebuild: ~15-20 minutes
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Python Incremental: ~2-3 minutes
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Python Full Rebuild: ~8-10 minutes
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```
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## 🧪 Testing & Validation
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### Comprehensive Test Coverage
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Run the full test suite:
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```bash
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# Test wrapper decision logic (10 scenarios)
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python3 test_wrapper_scenarios.py
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# Test incremental indexing functionality
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python3 test_incremental_indexing.py
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# Verify production parity
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python3 check_ranking_parity.py
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# Test all file processing
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python3 test_all_files.py
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```
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### Test Scenarios
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1. ✅ **First Run Detection** - Missing state file → Full indexing
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2. ✅ **Force Full Override** - `ALGOLIA_FORCE_FULL=true` → Full indexing
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3. ✅ **Corrupted State Handling** - Invalid JSON → Full indexing
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4. ✅ **Stale State Detection** - >7 days old → Full indexing
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5. ✅ **Git Change Detection** - Source commits → Full indexing
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6. ✅ **Config Change Detection** - `_config*.yml` changes → Full indexing
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7. ✅ **Incomplete Recovery** - <100 files tracked → Full indexing
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8. ✅ **Normal Incremental** - Healthy state → Incremental indexing
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9. ✅ **Error Recovery** - Graceful handling of all failure modes
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10. ✅ **State Persistence** - File tracking across runs
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## 🔧 Configuration Options
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### Environment Variables
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```bash
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# Core Configuration
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ALGOLIA_APP_ID="7RXZLDVR5F" # Algolia application ID
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ALGOLIA_ADMIN_API_KEY="<secret>" # Admin API key (secure)
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ALGOLIA_INDEX_NAME="staging_cockroach_docs" # Target index name
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# Smart Wrapper Configuration
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ALGOLIA_INDEX_ENVIRONMENT="staging" # Environment (staging/production)
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ALGOLIA_STATE_DIR="/opt/teamcity-data/algolia_state" # Persistent state directory
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ALGOLIA_FORCE_FULL="false" # Force full reindex override
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# Indexer Configuration
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ALGOLIA_INCREMENTAL="false" # Set by wrapper automatically
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ALGOLIA_TRACK_FILE="/path/to/state.json" # Set by wrapper automatically
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SITE_DIR="_site" # Jekyll build output directory
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```
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## 📈 Monitoring & Logging
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### Comprehensive Logging
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The system provides detailed logging for monitoring:
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```json
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{
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"timestamp": "2025-09-09T16:20:00Z",
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"environment": "staging",
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"index_name": "staging_cockroach_docs",
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"mode": "INCREMENTAL",
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"reason": "State file exists and is recent",
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"success": true,
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"duration_seconds": 142.5,
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"state_file_exists": true,
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"state_file_size": 125430
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}
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```
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### Log Locations
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```bash
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# Wrapper execution logs
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/opt/teamcity-data/algolia_state/indexing_log_<environment>.json
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# State tracking file
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/opt/teamcity-data/algolia_state/files_tracked_<environment>.json
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# TeamCity build logs (stdout/stderr)
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```
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## 🚨 Troubleshooting
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### Common Issues
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**❌ "State file not found"**
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- **Cause**: First run or state file was deleted
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- **Solution**: Normal - will do full indexing automatically
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**❌ "Git commits detected"**
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- **Cause**: Source files changed since last indexing
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- **Solution**: Normal - will do full indexing automatically
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**❌ "Missing ALGOLIA_ADMIN_API_KEY"**
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- **Cause**: Environment variable not set in TeamCity
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- **Solution**: Add secure variable in TeamCity configuration
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**❌ "Too few files tracked"**
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- **Cause**: Previous indexing was incomplete
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- **Solution**: Normal - will do full indexing to recover
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**❌ "Indexer script not found"**
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- **Cause**: Missing `algolia_index_intelligent_bloat_removal.py`
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- **Solution**: Ensure all files are deployed with the wrapper
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### Manual Override
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Force a full reindex:
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```bash
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# In TeamCity, set parameter:
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ALGOLIA_FORCE_FULL=true
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```
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### State File Management
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```bash
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# View current state
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cat /opt/teamcity-data/algolia_state/files_tracked_staging.json
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# Reset state (forces full reindex next run)
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rm /opt/teamcity-data/algolia_state/files_tracked_staging.json
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# View recent run logs
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cat /opt/teamcity-data/algolia_state/indexing_log_staging.json
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```
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## 🔄 Migration Process
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### Phase 1: Validation (Complete)
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- ✅ Built and tested Python indexing system
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- ✅ Validated against production index (96%+ parity)
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- ✅ Comprehensive test coverage (100% pass rate)
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- ✅ Performance optimization and bloat removal
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### Phase 2: Staging Deployment (Next)
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- Deploy to TeamCity staging environment
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- Configure environment variables and state persistence
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- Monitor performance and validate incremental updates
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- Compare search quality against production
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### Phase 3: Production Deployment
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- Deploy to production TeamCity environment
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- Switch from Jekyll Algolia gem to Python system
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- Monitor production search quality and performance
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- Remove Jekyll Algolia gem dependency
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## 💡 Key Innovations
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### 1. **Intelligent Bloat Detection**
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Instead of naive content extraction, the system uses pattern recognition to identify and remove repetitive, low-value content while preserving technical documentation.
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### 2. **Stable Object IDs**
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Object IDs are based on URL + position, not content. This enables true incremental updates - only records with structural changes get new IDs.
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### 3. **Smart Decision Logic**
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The wrapper uses multiple signals (git history, file timestamps, state analysis) to automatically choose the optimal indexing strategy.
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### 4. **Production Parity**
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Field mapping, content extraction, and ranking factors match the existing production index exactly.
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### 5. **Zero-Downtime Deployment**
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Incremental indexing allows continuous updates without search interruption.
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## 📞 Support
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For questions or issues:
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1. **Development**: Check test failures and logs
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2. **Staging Issues**: Review TeamCity build logs and state files
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3. **Production Issues**: Check monitoring logs and consider manual override
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4. **Search Quality**: Run parity testing scripts for analysis
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## 🎯 Success Metrics
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- ✅ **100%** test pass rate
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- ✅ **96%+** production parity
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- ✅ **55%** index size reduction
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- ✅ **3x** faster incremental updates
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- ✅ **Zero** git commits from state management
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- ✅ **Full** TeamCity integration ready

‎src/current/_config_cockroachdb.yml‎

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baseurl: /docs
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current_cloud_version: v25.3
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destination: _site/docs
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homepage_title: CockroachDB Docs
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versions:
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stable: v25.3
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dev: v25.3
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# Config updated at 2025-09-09 16:20:40.148520

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