// return FS/Erasure object layer and temp backend.
	objLayer, disks, err := prepareTestBackend(ctx, instanceType)
	if err != nil {
		t.Fatal(err)
	}

	// set new server configuration.
	if err = newTestConfig(globalMinioDefaultRegion, objLayer); err != nil {
		t.Fatalf("%s", err)
	}

	return initTestServerWithBackend(ctx, t, testServer, objLayer, disks)
}

	if err != nil {
		t.Fatal(err)
	}
	defer obj.Shutdown(context.Background())

	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	if err = newTestConfig(globalMinioDefaultRegion, obj); err != nil {
		t.Fatalf("Unable to initialize server config. %s", err)
	}

	defer removeRoots(fsDirs)

	z := obj.(*erasureServerPools)
	er := z.serverPools[0].sets[0]

func initFSObjectsB(disk string, t *testing.B) (obj ObjectLayer) {
	obj, _, err := initObjectLayer(context.Background(), mustGetPoolEndpoints(0, disk))
	if err != nil {
		t.Fatal(err)
	}

	newTestConfig(globalMinioDefaultRegion, obj)

	initAllSubsystems(GlobalContext)
	return obj
}

// BenchmarkListObjects - Run ListObject Repeatedly and benchmark.
func BenchmarkListObjects(b *testing.B) {