How do you capacity plan for Circuit breakers?

Capacity planning for circuit breakers is essential to ensure that your system can handle failure gracefully without impacting user experience. Circuit breakers are an important part of microservices architecture, preventing cascading failures by stopping calls to failing services for a predetermined period. Proper capacity planning involves understanding your system's load, failure rates, and response times, and ensuring that the circuit breaker's thresholds are set appropriately.

Example of Capacity Planning for Circuit Breakers

<?php // Circuit Breaker Configuration $circuitBreakerConfig = [ 'timeout' => 3000, // Timeout in milliseconds 'failureRateThreshold' => 50, // Failure rate in percentage 'slidingWindowSize' => 10, // Number of requests to consider 'slidingWindowType' => 'COUNT', // COUNT or TIME 'minimumNumberOfCalls' => 5, // Minimum number of calls before evaluation 'waitDurationInOpenState' => 10000 // Wait time before retrying ]; // Configure and Initialize Circuit Breaker $circuitBreaker = new CircuitBreaker($circuitBreakerConfig); // Function to execute with Circuit Breaker function executeWithCircuitBreaker($circuitBreaker, $serviceCall) { try { $circuitBreaker->execute($serviceCall); } catch (CircuitBreakerOpenException $e) { // Handle open circuit breaker echo "Service is unavailable, please try again later."; } } ?>

circuit breaker capacity planning microservices resilience fault tolerance

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