Update lazywriter.go

ARC replaced with LFU 

dalhelper/lazywriter.go

@@ -86,7 +86,7 @@ func (lfd *LazyFDPHelper) StartProcess(objectCount int, taskName string,
 
 	// Use default ARC algo for store
 	lfd.gc = gcache.New(objectCount).
-		ARC().
+		LFU().
 		Build()
 
 	//Init timer