MCP Memory Server

# Deployment Lessons Learned ## Friday Deployment Incident **Date**: 2024-09-13 **Severity**: High **Impact**: 2 hour downtime ### What Happened Deployed a "simple" configuration change at 4:30 PM on Friday. The change broke the authentication service, causing complete site outage. ### Root Cause - Configuration change wasn't tested in staging environment - Deployment happened during peak traffic hours - Insufficient monitoring alerts for auth service - No immediate rollback plan ### Lessons Learned 1. **Never deploy on Friday afternoons** - if something breaks, team isn't available for weekend fix 2. **Always test in staging first** - even "simple" changes can have unexpected interactions 3. **Deploy during low-traffic hours** - minimize impact if issues occur 4. **Have rollback plan ready** - should be one-click operation 5. **Monitor critical services** - auth service downtime should trigger immediate alerts ### Prevention Measures - Block Friday afternoon deployments in CI/CD pipeline - Mandatory staging deployment with 24h soak time - Enhanced monitoring for authentication services - Automated rollback triggers for service health failures ## Database Migration Gone Wrong **Date**: 2024-08-20 **Severity**: Critical **Impact**: Data corruption in user profiles ### What Happened Large database migration ran longer than expected, causing timeout and partial rollback that corrupted user profile data. ### Lessons Learned 1. **Test migrations on production-size dataset** - staging data was too small 2. **Break large migrations into smaller chunks** - avoid long-running transactions 3. **Always backup before migrations** - corruption recovery took 6 hours 4. **Monitor migration progress** - no visibility into completion status 5. **Have data validation scripts** - corruption wasn't detected immediately ### Prevention Measures - Mandatory production-scale testing environment - Migration chunking requirements for operations >5 minutes - Automated pre-migration backups - Post-migration data integrity validation scripts