Hello Reena, No there isn't a programmatic way to invoke the block scanner. Note though that the property to control its period is DN-local, so you can change it on DNs and do a DN rolling restart to make it take effect without requiring a HDFS downtime.
On Fri, Mar 28, 2014 at 3:07 PM, reena upadhyay <reena2...@outlook.com> wrote: > How to run data node block scanner on data node in a cluster from a remote > machine? > By default data node executes block scanner in 504 hours. This is the > default value of dfs.datanode.scan.period . If I want to run the data node > block scanner then one way is to configure the property of > dfs.datanode.scan.period in hdfs-site.xml but is there any other other way. > Is it possible to run data node block scanner on data node either through > command or pragmatically. -- Harsh J
