code: @Override
  	public String  startRestoreFromSnapshot(String snapshotName) {
  		String jobID = consNextJobID();
  		String jobName = consJobName("restoreBackup", snapshotName);
  		LongJob job = getNode().consRestoreFromSnapshotJob(jobID, jobName,
  				snapshotName);
  		startJob(job);
  		return jobID;
  	}
docs: Starts the asynchronous operation (- "long job") that will restore the
  data of local (!) storage node from specified snapshot. The operation
  will be completed with FAILED status if storage node is not local,
  storage node is not in NORMAL mode, or specified snapshot does not exist.
  
  <p>
  WARN: This operation will shut down and restart the storage node using
  the "doradus-cassandra.bat" utility tool (- STOP and START commands).
  That is, it is supposed that 1) <i>Cassandra</i> works as a Windows
  service, and 2) the running <i>Doradus</i>-server has rights of Windows
  administrator.
  
  @param snapshotName
  The name of snapshot.
  @exception java.lang.IllegalStateException
  If other job is executing currently.