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https://issues.apache.org/jira/browse/HADOOP-14688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16154008#comment-16154008
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Wei-Chiu Chuang commented on HADOOP-14688:
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+1. will commit today.
> Intern strings in KeyVersion and EncryptedKeyVersion
> ----------------------------------------------------
>
> Key: HADOOP-14688
> URL: https://issues.apache.org/jira/browse/HADOOP-14688
> Project: Hadoop Common
> Issue Type: Improvement
> Components: kms
> Reporter: Xiao Chen
> Assignee: Xiao Chen
> Attachments: GC root of the String.png, HADOOP-14688.01.patch,
> heapdump analysis.png, jxray.report
>
>
> This is inspired by [[email protected]]'s work on HDFS-11383.
> The key names and key version names are usually the same for a bunch of
> {{KeyVersion}} and {{EncryptedKeyVersion}}. We should not create duplicate
> objects for them.
> This is more important to HDFS-10899, where we try to re-encrypt all files'
> EDEKs in a given EZ. Those EDEKs all has the same key name, and mostly using
> no more than a couple of key version names.
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