Checkpointing process is defined in 2 configuration parameters: dfs.namenode.checkpoint.period -> 10 hr which will set the time for every checkpoint. Aslos dfs.namenode.checkpoint.txns is by default set to 1 million. What does this configuration do, in apache wiki website it says this configurations sets the number of uncheckpointed transactions. In the first configuration we are setting it for every 10hrs, in such scenario what is the necessity for setting value for uncheckpointed transactions. ... View more