#Introduction

#Introduction Global Rate Limiting for Services

The Global Rate Limiting module protects services from overload in high-concurrency scenarios through intelligent traffic control. It enables:

• Prevention of service breakdowns during traffic spikes
• Fine-grained access control via multi-dimensional rules
• Safe capacity planning through shadow mode analysis

#Advantages

• ​High-Concurrency Protection: Maintains service stability within resource limits
• ​Precision Control: API path/method/header-based rate limiting
• ​Risk-Free Testing: Shadow mode simulation without affecting production
• ​Real-Time Visibility: Visual monitoring of throttling effects

#Scenarios

• ​API Overload Protection Safeguard critical APIs from sudden traffic surges

• ​Sensitive Operation Throttling Enforce strict limits on write/delete operations

• ​Multi-Tenant Quota Management Implement fair usage policies across client groups

#Limitations

• Requires Redis cluster integration pre-configured
• Sidecar injection mandatory for target services
• Maximum 1 global policy per service
• Regex matching supports RE2 syntax only
• Shadow mode data retention period: 7 days