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https://issues.apache.org/jira/browse/HADOOP-10768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16057543#comment-16057543
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Daryn Sharp commented on HADOOP-10768:
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I specifically ensured the rpcv9 protocol (very early 2.x releases) is designed
to support a rpc proxy to reduce connections for instance to the NN. Ex. Every
rpc packet is framed so a proxy can mux/demux the packets to clients even if
encryption is used. I know the sasl wrap/unwrap path is expensive but haven't
had the cycles to improve it.
Adding encryption to the entire stream will negate the proxy capability which
is something I think will soon be needed with very large clusters. *-1* if
that's what this patch does. I'll review shortly.
> Optimize Hadoop RPC encryption performance
> ------------------------------------------
>
> Key: HADOOP-10768
> URL: https://issues.apache.org/jira/browse/HADOOP-10768
> Project: Hadoop Common
> Issue Type: Improvement
> Components: performance, security
> Affects Versions: 3.0.0-alpha1
> Reporter: Yi Liu
> Assignee: Dian Fu
> Attachments: HADOOP-10768.001.patch, HADOOP-10768.002.patch, Optimize
> Hadoop RPC encryption performance.pdf
>
>
> Hadoop RPC encryption is enabled by setting {{hadoop.rpc.protection}} to
> "privacy". It utilized SASL {{GSSAPI}} and {{DIGEST-MD5}} mechanisms for
> secure authentication and data protection. Even {{GSSAPI}} supports using
> AES, but without AES-NI support by default, so the encryption is slow and
> will become bottleneck.
> After discuss with [~atm], [~tucu00] and [~umamaheswararao], we can do the
> same optimization as in HDFS-6606. Use AES-NI with more than *20x* speedup.
> On the other hand, RPC message is small, but RPC is frequent and there may be
> lots of RPC calls in one connection, we needs to setup benchmark to see real
> improvement and then make a trade-off.
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