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https://issues.apache.org/jira/browse/HDFS-1087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Douglas updated HDFS-1087:
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Attachment: H1087-0.patch
In studying slowdowns in the MR scheduler, Amar Kamat found that {{Formatter}}
is expensive, particularly compared to appending to a {{StringBuilder}}. Since
the namenode may emit an entry to the audit log for every successful
transaction, small improvements will help.
> Use StringBuilder instead of Formatter for audit logs
> -----------------------------------------------------
>
> Key: HDFS-1087
> URL: https://issues.apache.org/jira/browse/HDFS-1087
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Reporter: Chris Douglas
> Priority: Minor
> Attachments: H1087-0.patch
>
>
> The audit logs do not use any {{format}} functionality that cannot be
> replaced by a simple, more efficient set of appends.
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