diff --git a/config/options.go b/config/options.go
index 4aca2cc..eae6afe 100644
--- a/config/options.go
+++ b/config/options.go
@@ -19,8 +19,9 @@ type OptionsType struct {
 
 	Printer string `short:"p" long:"printer" description:"the output printer to use (valid printers: ncurses, text, json)" default:"ncurses"`
 
-	Output       string `short:"o" long:"output" description:"the output channel to send printer output (valid output: stdout, file, tcp, udp)" default:"stdout"`
-	OutputTarget string `long:"target" description:"for output 'file' the location, for 'tcp' or 'udp' the url (host:port) to the server"`
+	Output                string `short:"o" long:"output" description:"the output channel to send printer output (valid output: stdout, file, tcp, udp)" default:"stdout"`
+	OutputTarget          string `long:"target" description:"for output 'file' the location, for 'tcp' or 'udp' the url (host:port) to the server"`
+	OutputTargetTruncate  bool `long:"targettruncate" description:"for output 'file' the target will only contain the latest result (can be used for prometheus json exporter)"`
 
 	NetworkDevice string `long:"netdev" description:"The network device used for the virtual traffic"`
 	StorageDevice string `long:"storedev" description:"The storage device used for the virtual block devices"`
diff --git a/runners/printer.go b/runners/printer.go
index 878eb74..69a02a9 100644
--- a/runners/printer.go
+++ b/runners/printer.go
@@ -41,6 +41,14 @@ func InitializePrinter(wg *sync.WaitGroup) {
 
 // Print runs one printing cycle
 func Print() {
+	if config.Options.Output == "file" && config.Options.OutputTargetTruncate {
+		err := os.Truncate(config.Options.OutputTarget, 0)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to truncate the output file")
+			os.Exit(1)
+		}
+	}
+
 	printable := models.Printable{}
 
 	// add general domain fields first