In what scenarios do you need this feature?

Hello,

Currently, SiYuan sync only offers two data center options:

• LianDi (China mainland)
• LiuYun (North America)

This creates significant issues for European users:

1. GDPR Compliance: EU regulations require data sovereignty and explicit consent for cross-border transfers
2. Performance: High latency (150ms+) from Europe to existing centers
3. Enterprise Adoption: Many EU companies have policies restricting data storage outside EU

Proposed Solution

Add a third data center option: EU-Central (Frankfurt/Amsterdam)

User Interface

Data Center Selection:
○ LianDi (Asia-Pacific)
○ LiuYun (North America)  
● EU-Central (Europe) [NEW]
○ Auto-detect

Key Features

• GDPR-compliant data processing
• <50ms latency for EU users
• Data migration tools between centers
• ISO 27001 certified hosting

Benefits

For Users:

• Legal compliance with EU regulations
• 3x faster sync performance
• Peace of mind for sensitive data

For SiYuan:

• Unlock EU enterprise market
• Competitive advantage vs Obsidian/Notion
• Avoid regulatory risks

Describe the optimal solution

Technical Requirements

• EU-based hosting provider (AWS/Azure/Google EU regions)
• End-to-end encryption
• GDPR audit trail
• Data export/deletion capabilities

Implementation Timeline

• Phase 1 (3-4 months): Infrastructure setup
• Phase 2 (2 months): UI development & migration tools
• Phase 3 (1-2 months): GDPR compliance & testing

Impact

This would enable SiYuan adoption by:

• EU healthcare professionals (patient data protection)
• Legal firms (attorney-client privilege)
• Educational institutions (student data protection)
• Government agencies (data sovereignty requirements)

Describe the candidate solution

No response

Other information

No response