Namespace check pointing is not performed until the namenode restarts.
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Key: HADOOP-227
URL: http://issues.apache.org/jira/browse/HADOOP-227
Project: Hadoop
Type: Bug
Components: dfs
Reporter: Konstantin Shvachko
In current implementation when the name node starts, it reads its image file,
then
the edits file, and then saves the updated image back into the image file.
The image file is never updated after that.
In order to provide the system reliability reliability the namespace
information should
be check pointed periodically, and the edits file should be kept relatively
small.
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