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https://issues.apache.org/jira/browse/HADOOP-9421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13683823#comment-13683823
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Luke Lu commented on HADOOP-9421:
---------------------------------

bq. I also have measured that the NEGOTIATE header is ~61 bytes + length of 
hostname. On my test cluster, it's 92 bytes.

You forgot to count the [protocol 
overhead|http://sd.wareonearth.com/~phil/net/overhead/], which is between 78 
bytes to 114 bytes per packet for TCP over ethernet. 
                
> Convert SASL to use ProtoBuf and add lengths for non-blocking processing
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-9421
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9421
>             Project: Hadoop Common
>          Issue Type: Sub-task
>    Affects Versions: 2.0.3-alpha
>            Reporter: Sanjay Radia
>            Assignee: Daryn Sharp
>         Attachments: HADOOP-9421.patch, HADOOP-9421.patch, HADOOP-9421.patch, 
> HADOOP-9421.patch, HADOOP-9421-v2-demo.patch
>
>


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