From 9ba52db5858c480cb8cf4125b0d698f188f22ba8 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Sat, 26 Nov 2016 12:14:06 -0800
Subject: [PATCH] add writable checking

fix https://github.com/chrislusf/seaweedfs/issues/405
---
 weed/topology/topology_vacuum.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/weed/topology/topology_vacuum.go b/weed/topology/topology_vacuum.go
index 3a6fcbae2..a7ef52336 100644
--- a/weed/topology/topology_vacuum.go
+++ b/weed/topology/topology_vacuum.go
@@ -86,7 +86,14 @@ func (t *Topology) Vacuum(garbageThreshold string) int {
 		for _, vl := range c.storageType2VolumeLayout.Items() {
 			if vl != nil {
 				volumeLayout := vl.(*VolumeLayout)
+				writableSet := make(map[storage.VolumeId]bool)
+				for _, id := range volumeLayout.writables {
+					writableSet[id] = true
+				}
 				for vid, locationlist := range volumeLayout.vid2location {
+					if _, isWritable := writableSet[vid]; !isWritable {
+						continue
+					}
 					glog.V(0).Infof("check vacuum on collection:%s volume:%d", c.Name, vid)
 					if batchVacuumVolumeCheck(volumeLayout, vid, locationlist, garbageThreshold) {
 						if batchVacuumVolumeCompact(volumeLayout, vid, locationlist) {