public void setSubTaskPercntgInWholeTask(float subTaskPercntgInWholeTask) {
    this.subTaskPercntgInWholeTask = subTaskPercntgInWholeTask;
  }
Set the current copy task percentage within the whole task if multiple copies are needed. Must
be called before calling
{@link #copy(BackupInfo, BackupManager, Configuration, BackupType, String[])}
@param subTaskPercntgInWholeTask The percentage of the copy subtask
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/mapreduce/MapReduceBackupCopyJob.java