pre-allocate volumes

test/s3/iam/Makefile

@@ -70,6 +70,7 @@ start-services: ## Start SeaweedFS services for testing
 	@$(WEED_BINARY) volume -port=$(VOLUME_PORT) \
 		-dataCenter=dc1 -rack=rack1 \
 		-dir=test-volume-data \
+		-max=100 \
 		-mserver=localhost:$(MASTER_PORT) > weed-volume.log 2>&1 & \
 		echo $$! > $(VOLUME_PID_FILE)
 	
@@ -103,6 +104,8 @@ wait-for-services: ## Wait for all services to be ready
 	@echo "Checking S3 API server..."
 	@timeout 30 bash -c 'until curl -s http://localhost:$(S3_PORT) > /dev/null 2>&1; do sleep 1; done' || (echo "❌ S3 API failed to start" && exit 1)
 	
+	@echo "Pre-allocating volumes for concurrent operations..."
+	@curl -s "http://localhost:$(MASTER_PORT)/vol/grow?collection=default&count=10&replication=000" > /dev/null || echo "⚠️  Volume pre-allocation failed, but continuing..."
 	@sleep 3
 	@echo "✅ All services are ready"
 

test/s3/iam/s3_iam_distributed_test.go

@@ -105,10 +105,10 @@ func TestS3IAMDistributedTests(t *testing.T) {
 	t.Run("distributed_concurrent_operations", func(t *testing.T) {
 		// Test concurrent operations across distributed instances with robust retry mechanisms
 		// This approach implements proper retry logic instead of tolerating errors to catch real concurrency issues
-		const numGoroutines = 4             // Optimal concurrency for CI reliability
-		const numOperationsPerGoroutine = 2 // Minimal operations per goroutine
-		const maxRetries = 3                // Maximum retry attempts for transient failures
-		const retryDelay = 100 * time.Millisecond
+		const numGoroutines = 3                   // Reduced concurrency for better CI reliability
+		const numOperationsPerGoroutine = 2       // Minimal operations per goroutine
+		const maxRetries = 3                      // Maximum retry attempts for transient failures
+		const retryDelay = 200 * time.Millisecond // Increased delay for better stability
 
 		var wg sync.WaitGroup
 		errors := make(chan error, numGoroutines*numOperationsPerGoroutine)
@@ -224,8 +224,8 @@ func TestS3IAMDistributedTests(t *testing.T) {
 						t.Logf("Warning: Failed to cleanup bucket %s: %v", bucketName, err)
 					}
 
-					// Small delay between operation sequences to reduce server load
-					time.Sleep(50 * time.Millisecond)
+					// Increased delay between operation sequences to reduce server load and improve stability
+					time.Sleep(100 * time.Millisecond)
 				}
 			}(i)
 		}