From 2c595d2d16629f7163587e1a08f2419c3df78ecc Mon Sep 17 00:00:00 2001
From: chrislusf <chris.lu@gmail.com>
Date: Fri, 10 Jul 2015 09:43:49 -0700
Subject: [PATCH] skip isFileUnchanged checking since ttl always change

skip checking since ttl always change. Fixing
https://github.com/chrislusf/seaweedfs/issues/166
---
 go/storage/volume.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/go/storage/volume.go b/go/storage/volume.go
index 0e6cadecc..998b0dd64 100644
--- a/go/storage/volume.go
+++ b/go/storage/volume.go
@@ -152,6 +152,9 @@ func (v *Volume) NeedToReplicate() bool {
 // isFileUnchanged checks whether this needle to write is same as last one.
 // It requires serialized access in the same volume.
 func (v *Volume) isFileUnchanged(n *Needle) bool {
+	if v.Ttl == EMPTY_TTL || v.Ttl.String() == "" {
+		return true
+	}
 	nv, ok := v.nm.Get(n.Id)
 	if ok && nv.Offset > 0 {
 		oldNeedle := new(Needle)