From 9bcaa655742649ca54c2663a914a2479a6a0db05 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Mon, 25 Jun 2018 01:20:15 -0700
Subject: [PATCH] avoid divided by 0

fix https://github.com/chrislusf/seaweedfs/issues/650
---
 weed/storage/volume_vacuum.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/weed/storage/volume_vacuum.go b/weed/storage/volume_vacuum.go
index 230fca104..c0bdcdf96 100644
--- a/weed/storage/volume_vacuum.go
+++ b/weed/storage/volume_vacuum.go
@@ -10,6 +10,9 @@ import (
 )
 
 func (v *Volume) garbageLevel() float64 {
+	if v.ContentSize() == 0 {
+		return 0
+	}
 	return float64(v.nm.DeletedSize()) / float64(v.ContentSize())
 }