refactoring

weed/storage/needle_map/needle_value.go

@@ -0,0 +1,17 @@
+package needle_map
+
+import (
+	. "github.com/chrislusf/seaweedfs/weed/storage/types"
+	"github.com/google/btree"
+)
+
+type NeedleValue struct {
+	Key    NeedleId
+	Offset Offset `comment:"Volume offset"` //since aligned to 8 bytes, range is 4G*8=32G
+	Size   uint32 `comment:"Size of the data portion"`
+}
+
+func (this NeedleValue) Less(than btree.Item) bool {
+	that := than.(NeedleValue)
+	return this.Key < that.Key
+}