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From Praveen Sripati <praveensrip...@gmail.com>
Subject NameNode Safe Mode and CheckPointing
Date Sun, 08 Jan 2012 03:43:54 GMT
When the checkpointing starts, the primary namenode starts a new edits
file. During the checkpointing process will the namenode go into safe
mode? According
to the Hadoop - The Definitive Guide

> The schedule for checkpointing is controlled by two configuration
parameters. The secondary namenode checkpoints every hour
(fs.checkpoint.period in seconds) or sooner if the edit log has reached 64
MB (fs.checkpoint.size in bytes), which it checks every five minutes.


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