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https://issues.apache.org/jira/browse/HDFS-958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16148519#comment-16148519
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Zhe Zhang edited comment on HDFS-958 at 8/31/17 6:34 AM:
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Actually it does make sense to at least make it an option to avoid creating a
{{FileStatus}} for each audit log. {{FSNamesystem#logAuditEvent}} only uses the
{{FileStatus}} to log the permission, which is not really that necessary in
many environments.
In a busy cluster, 30~60K audit logs are written every second. This is a
significant portion of GC pressure.
was (Author: zhz):
Actually it does make sense to at least make it an option to avoid creating a
{{FileStatus}} for each audit log. {{FSNamesystem#logAuditEvent}} only uses the
{{FileStatus}} to log the permission, which is not really that necessary in
many environments.
> Remove uneccessary creation of FileStatus objects in NameNode
> -------------------------------------------------------------
>
> Key: HDFS-958
> URL: https://issues.apache.org/jira/browse/HDFS-958
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Attachments: reduceFileStatus.patch
>
>
> NameNode creates FileStatus objects when
> 1. write audit logs
> 2. change file's lease
> The uses of FileStatus in these places are not necessary. We could use INode
> instead.
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