title: MariaDB Galera Cluster: change wresp_sst_method in production server
body: <p>I have a MariaDB Galera Cluster with 3 nodes and multi-master setup.<br>
  my current configuration for State Snapshot Transfer method is <code>rsync</code>.</p>
  
  <p>How to change this method to <code>xtrabackup-v2</code> without downtime and data loss?<br>
  Can I shutdown and setup nodes one by one?</p>