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https://issues.apache.org/jira/browse/HDFS-1073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928682#action_12928682
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Sanjay Radia commented on HDFS-1073:
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>.. not understand the rational for "I'm quitting!" record. Why should NN care
>whether last record was lost or not, just keep going with what it has.
The quitting record basically shows that the NN did a shutdown and did not die.
This is useful to know. The NN will still continue to keep going as before.
If we were to add a similar "rolled" transaction at the end of every roll then
we could avoid the edits_100-100 since it will become edits_100-101.
Also the "rolled" transaction is a nice way to to tell the BN that the primary
did a roll without any special message from NN to BNN.
> Simpler model for Namenode's fs Image and edit Logs
> ----------------------------------------------------
>
> Key: HDFS-1073
> URL: https://issues.apache.org/jira/browse/HDFS-1073
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Sanjay Radia
> Assignee: Todd Lipcon
> Attachments: hdfs-1073.txt, hdfs1073.pdf
>
>
> The naming and handling of NN's fsImage and edit logs can be significantly
> improved resulting simpler and more robust code.
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