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https://issues.apache.org/jira/browse/HDFS-12172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16116028#comment-16116028
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Xiao Chen commented on HDFS-12172:
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The failed tests and findbug warnings are not related to this jira.
Hi [~daryn],
Do you have cycles to review the slightly modified version of your patch? (Hope
you don't mind me updating it. :) )
> Reduce EZ lookup overhead
> -------------------------
>
> Key: HDFS-12172
> URL: https://issues.apache.org/jira/browse/HDFS-12172
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.7.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: HDFS-12172.01.patch, HDFS-12172.patch
>
>
> A number of inefficiencies exist in EZ lookups. These are amplified by
> frequent operations like list status. Once one encryption zone exists, all
> operations take the performance penalty.
> Ex. Operations should not perform redundant lookups. EZ path reconstruction
> should be lazy since it's not required in the common case. Renames do not
> need to reallocate new IIPs to check parent dirs for EZ.
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