Hadoop "hadoop dfsadmin command -triggerBlockReport"
BlockReports are sent to Namenode from the Datanodes periodically (every 6 hours
by default). This command hdfs dfsadmin -triggerBlockReport
is to send them on demand. These reports are not available as a local file for view.
You can use hdfs fsck / -files -blocks
to view the block report of entire filesystem.