FileInput should have own limiter algorithm

limiter.go

@@ -36,10 +36,20 @@ func NewLimiter(plugin interface{}, options string) io.ReadWriter {
 	l.plugin = plugin
 	l.currentTime = time.Now().UnixNano()
 
+	// FileInput have its own rate limiting. Unlike other inputs we not just dropping requests, we can slow down or speed up request emittion.
+	if fi, ok := l.plugin.(*FileInput); ok && l.isPercent {
+		fi.speedFactor = float64(l.limit) / float64(100)
+	}
+
 	return l
 }
 
 func (l *Limiter) isLimited() bool {
+	// File input have its own limiting algorithm
+	if _, ok := l.plugin.(*FileInput); ok {
+		return false
+	}
+
 	if l.isPercent {
 		return l.limit <= rand.Intn(100)
 	}
@@ -71,9 +81,9 @@ func (l *Limiter) Write(data []byte) (n int, err error) {
 func (l *Limiter) Read(data []byte) (n int, err error) {
 	n, err = l.plugin.(io.Reader).Read(data)
 
-	if l.isLimited() {		
+	if l.isLimited() {
 		return 0, nil
-	}	
+	}
 
 	return
 }