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https://issues.apache.org/jira/browse/HDFS-12746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16225651#comment-16225651
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Anu Engineer commented on HDFS-12746:
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[~xkrogen] It is an interesting idea. Recently I had an off-line chat with
[~arpitagarwal] and we came to the conclusion that it would be nice to have an
audit log in the data nodes. In the idea that we chatted about, we were
thinking that we should log all commands that come to data node, both via
heartbeats and from the client. Would that be something that is interesting to
you? We also wanted these to be machine-readable -- so that RPC sans data can
be logged. This gives us the ability to reconstruct data node activity. I am
hoping that this data is useful for trace-based simulation also.
> DataNode Audit Logger
> ---------------------
>
> Key: HDFS-12746
> URL: https://issues.apache.org/jira/browse/HDFS-12746
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode, logging
> Reporter: Erik Krogen
>
> I would like to discuss adding in an audit logger for the Datanodes. We have
> audit logging on pretty much all other components: Namenode, ResourceManager,
> NodeManager. It seems the DN should have a similar concept to log, at
> minimum, all block reads/writes. I think all of the interesting information
> does already appear in the DN logs at INFO level but it would be nice to have
> a specific audit class that this gets logged through, a la {{RMAuditLogger}}
> and {{NMAuditLogger}}, to enable special handling.
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