dqutils::MonitoringFile::CopyHistogram Node1 dqutils::MonitoringFile ::CopyHistogram # m_target # m_dirName # m_metadata + CopyHistogram() + CopyHistogram() + operator=() + ~CopyHistogram() + execute() + execute() + execute() + executeMD() + executeMD() + executeMD() # fillMD() Node2 dqutils::MonitoringFile ::HistogramOperation + ~HistogramOperation() + execute() + execute() + execute() + executeMD() + executeMD() + executeMD() Node2->Node1