public final static TaskName getStandbyTaskName(TaskName activeTaskName, int replicaNum) {
    return new TaskName(STANDBY_TASKNAME_PREFIX.concat(TASKNAME_SEPARATOR)
        .concat(activeTaskName.getTaskName())
        .concat(TASKNAME_SEPARATOR)
        .concat(String.valueOf(replicaNum)));
  }
Returns true if the containerName implies a standby container, false otherwise.
@param containerID The desired containerID
@return
samza-core/src/main/java/org/apache/samza/clustermanager/StandbyTaskUtil.java