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https://issues.apache.org/jira/browse/HDFS-2060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13078407#comment-13078407
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Allen Wittenauer commented on HDFS-2060:
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This isn't a Linux thing. It's a processor thing. Large (or Huge) pages on
most Intel CPUs are around 2MB. Something like an UltraSPARC and Itanium can
do 256MB. Power5's can do crazy things like 16GB.
> DFS client RPCs using protobufs
> -------------------------------
>
> Key: HDFS-2060
> URL: https://issues.apache.org/jira/browse/HDFS-2060
> Project: Hadoop HDFS
> Issue Type: New Feature
> Affects Versions: 0.23.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hdfs-2060-getblocklocations.txt
>
>
> The most important place for wire-compatibility in DFS is between clients and
> the cluster, since lockstep upgrade is very difficult and a single client may
> want to talk to multiple server versions. So, I'd like to focus this JIRA on
> making the RPCs between the DFS client and the NN/DNs wire-compatible using
> protocol buffer based serialization.
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