diff --git a/backup.go b/backup.go
index c38ce73..3e08851 100644
--- a/backup.go
+++ b/backup.go
@@ -33,7 +33,7 @@ func (bacupKey *BackupKey) IsDirectory() (isDirectory bool) {
 
 func (bacupKey *BackupKey) IsExpired() (isExpired bool) {
 	if bacupKey.Expiration != nil {
-		bacupKey.TTL = int64(bacupKey.Expiration.Sub(time.Now().UTC()))
+		bacupKey.TTL = int64(bacupKey.Expiration.Sub(time.Now().UTC()).Seconds())
 		isExpired = bacupKey.TTL <= 0
 	}
 
@@ -115,7 +115,7 @@ func DumpDataSet(dataSet []*BackupKey, dumpFilePath string) {
 		config.LogFatal("Error when trying to encode data set into json. Error: ", err)
 	}
 
-	file, error := os.OpenFile(dumpFilePath, os.O_WRONLY|os.O_CREATE, 0666)
+	file, error := os.OpenFile(dumpFilePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
 	defer file.Close()
 	if error != nil {
 		config.LogFatal("Error when trying to open the file `"+dumpFilePath+"`. Error: ", error)
diff --git a/config.go b/config.go
index cdf1696..cadaefe 100644
--- a/config.go
+++ b/config.go
@@ -14,6 +14,7 @@ type Config struct {
 	EtcdConfigPath     string          `json:"etcdConfigPath,omitempty"`
 	DumpFilePath       string          `json:"dumpFilePath,omitempty"`
 	BackupStrategy     *BackupStrategy `json:"backupStrategy,omitempty"`
+	SyncCluster        bool            `json:"syncCluster,omitempty"`
 	LogFatal           func(v ...interface{})
 	LogPrintln         func(v ...interface{})
 }
@@ -30,6 +31,7 @@ func (config *Config) ToString() string {
 	stringVersion += ", EtcdConfigPath: " + config.EtcdConfigPath
 	stringVersion += ", DumpFilePath: " + config.DumpFilePath
 	stringVersion += ", BackupStrategy: " + fmt.Sprintf("%#v", config.BackupStrategy)
+	stringVersion += ", SyncCluster: " + fmt.Sprintf("%#v", config.SyncCluster)
 
 	return stringVersion
 }
diff --git a/fixtures/etcd-configuration.json b/fixtures/etcd-configuration.json
index 31811a2..8f3a602 100644
--- a/fixtures/etcd-configuration.json
+++ b/fixtures/etcd-configuration.json
@@ -1,10 +1,8 @@
 {
   "cluster": {
-    "leader": "http://my-leader.com:4001/",
+    "leader": "http://127.0.0.1:2379",
     "machines": [
-      "http://my-follower1.com:4001/",
-      "http://my-follower2.com:4001/",
-      "http://my-follower3.com:4001/"
+      "http://127.0.0.1:2379"
     ]
   },
   "config": {
diff --git a/main.go b/main.go
index e82db29..9758435 100644
--- a/main.go
+++ b/main.go
@@ -27,9 +27,11 @@ func initializeClient(configFilePath string) *etcd.Client {
 		config.LogFatal("Error when trying to load the configuration file: `"+configFilePath+"`. Error: ", error)
 	}
 
-	success := etcdClient.SyncCluster()
-	if !success {
-		config.LogFatal("cannot sync machines")
+	if config.SyncCluster {
+		success := etcdClient.SyncCluster()
+		if !success {
+			config.LogFatal("cannot sync machines")
+		}
 	}
 
 	return etcdClient