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From "Xiao Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10899) Add functionality to re-encrypt EDEKs
Date Tue, 22 Aug 2017 07:41:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16136462#comment-16136462
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Xiao Chen commented on HDFS-10899:
----------------------------------

bq. It looks like ReencryptionTask.batch does not need to use file name as the key; instead,
it can use INode id as key, and this way it reduces the overhead to translate inode to file
name back and forth.
Yup, I think that's inline with Daryn's comment.

bq. ReencryptionUpdater#processOneTask ... better part of ReencryptionTask instead of ReencryptionUpdater...
Intention was that handler produces callables, and updater consumes callables. {{ReencryptionTask}}
is a struct holding information about the callable, so I think process on updater makes sense.

bq. Does task.numFilesUpdated equal task.batch.size()?
May or may not. If things caused a file to be skipped (those conditions above which would
lead to a {{continue}}), then not equal.

bq. This variable name is a little cryptic: zst
Renamed to 'tracker', better name suggestion welcome.

bq. There are a few TODOs
Failure handling wasn't done at the time. patch 15 does it, with added unit tests that utilize
fault injector.



> Add functionality to re-encrypt EDEKs
> -------------------------------------
>
>                 Key: HDFS-10899
>                 URL: https://issues.apache.org/jira/browse/HDFS-10899
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: encryption, kms
>            Reporter: Xiao Chen
>            Assignee: Xiao Chen
>         Attachments: editsStored, HDFS-10899.01.patch, HDFS-10899.02.patch, HDFS-10899.03.patch,
HDFS-10899.04.patch, HDFS-10899.05.patch, HDFS-10899.06.patch, HDFS-10899.07.patch, HDFS-10899.08.patch,
HDFS-10899.09.patch, HDFS-10899.10.patch, HDFS-10899.10.wip.patch, HDFS-10899.11.patch, HDFS-10899.12.patch,
HDFS-10899.13.patch, HDFS-10899.14.patch, HDFS-10899.wip.2.patch, HDFS-10899.wip.patch, Re-encrypt
edek design doc.pdf, Re-encrypt edek design doc V2.pdf
>
>
> Currently when an encryption zone (EZ) key is rotated, it only takes effect on new EDEKs.
We should provide a way to re-encrypt EDEKs after the EZ key rotation, for improved security.



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