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https://issues.apache.org/jira/browse/HADOOP-14705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16129874#comment-16129874
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Xiao Chen commented on HADOOP-14705:
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Sorry figured I omitted the comment about stopwatch.
bq. Also, does it return time in milliseconds? Can you add the time unit into
log message as well?
>From recent debugging experience, I think it makes sense to add this message
>to info level, so we can easily find how the underlying keyprovider performed
>in the hind sight.
The stopwatch used is a {{com.google.common.base.Stopwatch}}, and can
conveniently handle units dynamically in toString. A sample log reads this:
bq. ... reencryptEncryptedKeys 1000 keys for key k1 took 51.64 ms
> Add batched reencryptEncryptedKey interface to KMS
> --------------------------------------------------
>
> Key: HADOOP-14705
> URL: https://issues.apache.org/jira/browse/HADOOP-14705
> Project: Hadoop Common
> Issue Type: Improvement
> Components: kms
> Reporter: Xiao Chen
> Assignee: Xiao Chen
> Attachments: HADOOP-14705.01.patch, HADOOP-14705.02.patch,
> HADOOP-14705.03.patch, HADOOP-14705.04.patch, HADOOP-14705.05.patch
>
>
> HADOOP-13827 already enabled the KMS to re-encrypt a {{EncryptedKeyVersion}}.
> As the performance results of HDFS-10899 turns out, communication overhead
> with the KMS occupies the majority of the time. So this jira proposes to add
> a batched interface to re-encrypt multiple EDEKs in 1 call.
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