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https://issues.apache.org/jira/browse/HDFS-1073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12853631#action_12853631
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Robert Chansler commented on HDFS-1073:
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The name of a file is not the issue, but rather knowing what is in the file.
Sanjay (in an early comment) stated the correctness rule in terms of TxIDs. Is
there a proposal to substitute some other correctness rules? Another rule set
seems to be more complex than what Sanjay proposes if it presupposes file name
rules and coordination about when particular files are created, written and
closed.
Describing correctness in terms of TxIDs is attractive in that it is then
possible to state retention rules for edits and image files conveniently. And
it seems to facilitate the charming idea of having a utility service create
checkpoints for any number of name servers without coordination/cooperation.
> 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
>
> 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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