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https://issues.apache.org/jira/browse/HDFS-14109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16711810#comment-16711810
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Kihwal Lee commented on HDFS-14109:
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This has less to do with federation itself. Rather, it is more about the way
audit logs are collected and processed from multiple namenodes. People deal
with logs from multiple systems today without having to insert the source
identity in every single log line.
> Improve hdfs auditlog format and support federation friendly
> ------------------------------------------------------------
>
> Key: HDFS-14109
> URL: https://issues.apache.org/jira/browse/HDFS-14109
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: He Xiaoqiao
> Assignee: He Xiaoqiao
> Priority: Major
> Attachments: HDFS-14109.patch
>
>
> The following auditlog format does not well meet requirement for federation
> arch currently. Since some case we need to aggregate all namespace audit log,
> if there are some common path request(e.g. /tmp, /user/ etc. some path may
> not appear in mountTable, but the path is very real), we will have no idea to
> split them that which namespace it request to. So I propose add column
> {{nsid}} to support federation more friendly.
> {quote}2018-11-27 13:20:30,028 INFO FSNamesystem.audit: allowed=true
> ugi=hdfs/hostn...@realm.com (auth:KERBEROS) ip=/10.1.1.2 cmd=getfileinfo
> src=/path dst=null perm=null proto=rpc clientName=null
> {quote}
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