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https://issues.apache.org/jira/browse/MAPREDUCE-5890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14043900#comment-14043900
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Alejandro Abdelnur commented on MAPREDUCE-5890:
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bq. If this really is a requirement, aren't we better off asking cluster admins
to either install disks with local file-systems that support encryption
specifically for intermediate data or just create some partitions that support
encryption? That seems like the right layer to handle something like this
instead of adding a whole lot of complexity into the software that only has a
downside of performance.
Asking to install additional soft to encrypt local FS means installing Kernel
modules.
Also, this would mean that ALL MR jobs are going to pay the penalty of
encrypted intermediate data. That is not reasonable.
I don't agree on the statement that this is "adding a lot of complexity", it is
simply wrapping the streams where necessary.
bq. Wearing my YARN hat, it is not enough to do this just for MapReduce. Every
other framework running on YARN will need to add this complexity - this is
asking for too much complexity. We are better off handling it at the
file-system/partition/disk level.
This patch is not touching anything in Yarn, but in MapReduce, private/evolving
classes of it.
> Support for encrypting Intermediate data and spills in local filesystem
> -----------------------------------------------------------------------
>
> Key: MAPREDUCE-5890
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5890
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: security
> Affects Versions: 2.4.0
> Reporter: Alejandro Abdelnur
> Assignee: Arun Suresh
> Labels: encryption
> Attachments: MAPREDUCE-5890.3.patch, MAPREDUCE-5890.4.patch,
> MAPREDUCE-5890.5.patch, MAPREDUCE-5890.6.patch, MAPREDUCE-5890.7.patch,
> MAPREDUCE-5890.8.patch,
> org.apache.hadoop.mapred.TestMRIntermediateDataEncryption-output.txt,
> syslog.tar.gz
>
>
> For some sensitive data, encryption while in flight (network) is not
> sufficient, it is required that while at rest it should be encrypted.
> HADOOP-10150 & HDFS-6134 bring encryption at rest for data in filesystem
> using Hadoop FileSystem API. MapReduce intermediate data and spills should
> also be encrypted while at rest.
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