// monitor http requests
	var serverType string
	if s.auth == nil {
		serverType = "readonly"
	} else {
		serverType = "readwrite"
	}

	method, path := s.getMetricMethodBucket(req.Method), s.getMetricBucket(req.URL.Path)

	longRunning := strconv.FormatBool(isLongRunningRequest(path))

	servermetrics.HTTPRequests.WithLabelValues(method, path, serverType, longRunning).Inc()

		// Init and run test on ErasureSD backend with signature v4.
		{serverType: "ErasureSD", signer: signerV4},
		// Init and run test on ErasureSD backend, with tls enabled.
		{serverType: "ErasureSD", signer: signerV4, secure: true},
		// Init and run test on Erasure backend.
		{serverType: "Erasure", signer: signerV4},
		// Init and run test on ErasureSet backend.
		{serverType: "ErasureSet", signer: signerV4},
	}